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Vuong NL, Quyen NTH, Tien NTH, Duong Thi Hue K, Duyen HTL, Lam PK, Tam DTH, Van Ngoc T, Jaenisch T, Simmons CP, Yacoub S, Wills BA, Geskus R. Dengue viremia kinetics and effects on platelet count and clinical outcomes: An analysis of 2340 patients from Vietnam. eLife 2024; 13:RP92606. [PMID: 38904662 PMCID: PMC11192532 DOI: 10.7554/elife.92606] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024] Open
Abstract
Background Viremia is a critical factor in understanding the pathogenesis of dengue infection, but limited data exist on viremia kinetics. This study aimed to investigate the kinetics of viremia and its effects on subsequent platelet count, severe dengue, and plasma leakage. Methods We pooled data from three studies conducted in Vietnam between 2000 and 2016, involving 2340 dengue patients with daily viremia measurements and platelet counts after symptom onset. Viremia kinetics were assessed using a random effects model that accounted for left-censored data. The effects of viremia on subsequent platelet count and clinical outcomes were examined using a landmark approach with a random effects model and logistic regression model with generalized estimating equations, respectively. The rate of viremia decline was derived from the model of viremia kinetics. Its effect on the clinical outcomes was assessed by logistic regression models. Results Viremia levels rapidly decreased following symptom onset, with variations observed depending on the infecting serotype. DENV-1 exhibited the highest mean viremia levels during the first 5-6 days, while DENV-4 demonstrated the shortest clearance time. Higher viremia levels were associated with decreased subsequent platelet counts from day 6 onwards. Elevated viremia levels on each illness day increased the risk of developing severe dengue and plasma leakage. However, the effect size decreased with later illness days. A more rapid decline in viremia is associated with a reduced risk of the clinical outcomes. Conclusions This study provides comprehensive insights into viremia kinetics and its effect on subsequent platelet count and clinical outcomes in dengue patients. Our findings underscore the importance of measuring viremia levels during the early febrile phase for dengue studies and support the use of viremia kinetics as outcome for phase-2 dengue therapeutic trials. Funding Wellcome Trust and European Union Seventh Framework Programme.
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Affiliation(s)
- Nguyen Lam Vuong
- University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityViet Nam
- Oxford University Clinical Research UnitHo Chi Minh CityViet Nam
| | | | | | | | | | - Phung Khanh Lam
- University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityViet Nam
- Oxford University Clinical Research UnitHo Chi Minh CityViet Nam
| | | | - Tran Van Ngoc
- Hospital for Tropical DiseasesHo Chi Minh CityViet Nam
| | - Thomas Jaenisch
- Center for Global Health, Colorado School of Public HealthAuroraUnited States
- Heidelberg Institute of Global Health (HIGH), Heidelberg University HospitalHeidelbergGermany
| | - Cameron P Simmons
- Centre for Tropical Medicine and Global health, Nuffield Department of Clinical Medicine, University of OxfordOxfordUnited Kingdom
- World Mosquito Program, Monash UniversityClaytonAustralia
| | - Sophie Yacoub
- Oxford University Clinical Research UnitHo Chi Minh CityViet Nam
- Centre for Tropical Medicine and Global health, Nuffield Department of Clinical Medicine, University of OxfordOxfordUnited Kingdom
| | - Bridget A Wills
- Oxford University Clinical Research UnitHo Chi Minh CityViet Nam
- Centre for Tropical Medicine and Global health, Nuffield Department of Clinical Medicine, University of OxfordOxfordUnited Kingdom
| | - Ronald Geskus
- Oxford University Clinical Research UnitHo Chi Minh CityViet Nam
- Centre for Tropical Medicine and Global health, Nuffield Department of Clinical Medicine, University of OxfordOxfordUnited Kingdom
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2
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Dias AG, Duarte E, Zambrana JV, Cardona-Ospina JA, Bos S, Roy V, Kuan G, Balmaseda A, Alter G, Harris E. Complement-dependent virion lysis mediated by dengue-Zika virus cross-reactive antibodies correlates with protection from severe dengue disease. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.06.03.24308395. [PMID: 38883768 PMCID: PMC11177908 DOI: 10.1101/2024.06.03.24308395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Primary infection with one of four dengue virus serotypes (DENV1-4) may generate antibodies that protect or enhance subsequent secondary heterotypic infections. However, the characteristics of heterotypic cross-reactive antibodies associated with protection from symptomatic infection and severe disease are not well-defined. We selected plasma samples collected before a secondary DENV heterotypic infection that was classified either as dengue fever (DF, n = 31) or dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS, n = 33) from our longstanding pediatric cohort in Nicaragua. We screened various antibody properties to determine the features correlated with protection from DHF/DSS. Protection was associated with high levels of binding of various antibody isotypes, IgG subclasses and effector functions, including antibody-dependent complement deposition, ADCD. Although the samples were derived from DENV-exposed, Zika virus (ZIKV)-naïve individuals, the protective ADCD association was stronger when assays were conducted with recombinant ZIKV antigens. Further, we showed that a complement-mediated virion lysis (virolysis) assay conducted with ZIKV virions was strongly associated with protection, a finding reproduced in an independent sample set collected prior to secondary heterotypic inapparent versus symptomatic DENV infection. Virolysis was the main antibody feature correlated with protection from DHF/DSS and severe symptoms, such as thrombocytopenia, hemorrhagic manifestations, and plasma leakage. Hence, anti-DENV antibodies that cross-react with ZIKV, target virion-associated epitopes, and mediate complement-dependent virolysis are correlated with protection from secondary symptomatic DENV infection and DHF/DSS. These findings may support the rational design and evaluation of dengue vaccines and development of therapeutics.
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Affiliation(s)
- Antonio G Dias
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Elias Duarte
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Jose Victor Zambrana
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Harbor, MI, USA
| | - Jaime A Cardona-Ospina
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Sandra Bos
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Vicky Roy
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - Guillermina Kuan
- Sustainable Sciences Institute, Managua, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua, Nicaragua
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virologia, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
| | - Galit Alter
- Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
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3
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Vicco A, McCormack C, Pedrique B, Ribeiro I, Malavige GN, Dorigatti I. A scoping literature review of global dengue age-stratified seroprevalence data: estimating dengue force of infection in endemic countries. EBioMedicine 2024; 104:105134. [PMID: 38718682 PMCID: PMC11096825 DOI: 10.1016/j.ebiom.2024.105134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND Dengue poses a significant burden worldwide, and a more comprehensive understanding of the heterogeneity in the intensity of dengue transmission within endemic countries is necessary to evaluate the potential impact of public health interventions. METHODS This scoping literature review aimed to update a previous study of dengue transmission intensity by collating global age-stratified dengue seroprevalence data published in the Medline, Embase and Web of Science databases from 2014 to 2023. These data were then utilised to calibrate catalytic models and estimate the force of infection (FOI), which is the yearly per-capita risk of infection for a typical susceptible individual. FINDINGS We found a total of 66 new publications containing 219 age-stratified seroprevalence datasets across 30 endemic countries. Together with the previously available average FOI estimates, there are now more than 250 dengue average FOI estimates obtained from seroprevalence studies from across the world. INTERPRETATION The results show large heterogeneities in average dengue FOI both across and within countries. These new estimates can be used to inform ongoing modelling efforts to improve our understanding of the drivers of the heterogeneity in dengue transmission globally, which in turn can help inform the optimal implementation of public health interventions. FUNDING UK Medical Research Council, Wellcome Trust, Community Jameel, Drugs for Neglected Disease initiative (DNDi) funded by the French Development Agency, Médecins Sans Frontières International; Swiss Agency for Development and Cooperation and UK aid.
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Affiliation(s)
- Anna Vicco
- Department of Molecular Medicine, University of Padua, Padua, Italy; MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom.
| | - Clare McCormack
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom
| | - Belen Pedrique
- Drugs for Neglected Diseases Initiative (DNDi), Geneva, Switzerland
| | - Isabela Ribeiro
- Drugs for Neglected Diseases Initiative (DNDi), Geneva, Switzerland
| | | | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom.
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4
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Zambrana JV, Hasund CM, Aogo RA, Bos S, Arguello S, Gonzalez K, Collado D, Miranda T, Kuan G, Gordon A, Balmaseda A, Katzelnick LC, Harris E. Primary exposure to Zika virus is linked with increased risk of symptomatic dengue virus infection with serotypes 2, 3, and 4, but not 1. Sci Transl Med 2024; 16:eadn2199. [PMID: 38809964 DOI: 10.1126/scitranslmed.adn2199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 04/23/2024] [Indexed: 05/31/2024]
Abstract
Infection with any of the four dengue virus serotypes (DENV1-4) can protect against or enhance subsequent dengue depending on preexisting antibodies and infecting serotype. Additionally, primary infection with the related flavivirus Zika virus (ZIKV) is associated with increased risk of DENV2 disease. Here, we measured how prior DENV and ZIKV immunity influenced risk of disease caused by DENV1-4 in a pediatric Nicaraguan cohort. Of 3412 participants in 2022, 10.6% experienced dengue cases caused by DENV1 (n = 139), DENV4 (n = 133), DENV3 (n = 54), DENV2 (n = 9), or an undetermined serotype (n = 39). Longitudinal clinical and serological data were used to define infection histories, and generalized linear and additive models adjusted for age, sex, time since last infection, and year, and repeat measurements were used to predict disease risk. Compared with flavivirus-naïve participants, primary ZIKV infection was associated with increased risk of disease caused by DENV4 (relative risk = 2.62, 95% confidence interval: 1.48 to 4.63) and DENV3 (2.90, 1.34 to 6.27), but not DENV1 infection. Primary DENV infection or DENV followed by ZIKV infection was also associated with increased risk of DENV4 disease. We reanalyzed 19 years of cohort data and demonstrated that prior flavivirus immunity and antibody titer had distinct associations with disease risk depending on incoming serotype. We thus find that prior ZIKV infection, like prior DENV infection, is associated with increased risk of disease with certain DENV serotypes. Cross-reactivity among flaviviruses should be considered when assessing vaccine safety and efficacy.
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Affiliation(s)
- José Victor Zambrana
- Sustainable Sciences Institute, Managua 14006, Nicaragua
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Chloe M Hasund
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-3203, USA
| | - Rosemary A Aogo
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-3203, USA
| | - Sandra Bos
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA 94720-3370, USA
| | - Sonia Arguello
- Sustainable Sciences Institute, Managua 14006, Nicaragua
| | - Karla Gonzalez
- Sustainable Sciences Institute, Managua 14006, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua 14062, Nicaragua
| | | | | | - Guillermina Kuan
- Sustainable Sciences Institute, Managua 14006, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua 12037, Nicaragua
| | - Aubree Gordon
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua 14006, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua 14062, Nicaragua
| | - Leah C Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-3203, USA
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA 94720-3370, USA
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5
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Mpingabo PI, Ylade M, Aogo RA, Crisostomo MV, Thiono DJ, Daag JV, Agrupis KA, Escoto AC, Raimundi-Rodriguez GL, Odio CD, Fernandez MA, White L, de Silva AM, Deen J, Katzelnick LC. Envelope-dimer epitope-like broadly protective antibodies against dengue in children following natural infection and vaccination. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.04.30.24306574. [PMID: 38746253 PMCID: PMC11092691 DOI: 10.1101/2024.04.30.24306574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Cross-reactive antibodies (Abs) to epitopes that span envelope proteins on the virion surface are hypothesized to protect against dengue. Here, we measured Abs targeting the quaternary envelope dimer epitope (EDE) as well as neutralizing and binding Abs and evaluate their association with dengue virus (DENV) infection, vaccine response, and disease outcome in dengue vaccinated and unvaccinated children (n=252) within a longitudinal cohort in Cebu, Philippines (n=2,996). Abs targeting EDE were prevalent and strongly associated with broad neutralization of DENV1-4 in those with baseline multitypic immunity. Subsequent natural infection and vaccination boosted EDE-like, neutralizing, and binding Abs. EDE-like Abs were associated with reduced dengue risk and mediated the protective effect of binding and neutralizing Abs on symptomatic and severe dengue. Thus, Abs targeting quaternary epitopes help explain broad cross protection in those with multiple prior DENV exposures, making them useful for evaluation and development of future vaccines and therapeutics.
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6
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Lim JT, Bansal S, Chong CS, Dickens B, Ng Y, Deng L, Lee C, Tan LY, Chain G, Ma P, Sim S, Tan CH, Cook AR, Ng LC. Efficacy of Wolbachia-mediated sterility to reduce the incidence of dengue: a synthetic control study in Singapore. THE LANCET. MICROBE 2024; 5:e422-e432. [PMID: 38342109 DOI: 10.1016/s2666-5247(23)00397-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 02/13/2024]
Abstract
BACKGROUND Due to the absence of available therapeutics and good vaccines, vector control solutions are needed to mitigate the spread of dengue. Matings between male Aedes aegypti mosquitoes infected with the wAlbB strain of Wolbachia and wildtype females yield non-viable eggs. We evaluated the efficacy of releasing wAlbB-infected A aegypti male mosquitoes to suppress dengue incidence. METHODS In this synthetic control study, we conducted large-scale field trials in Singapore involving release of wAlbB-infected A aegypti male mosquitoes for dengue control via vector population suppression, from epidemiological week (EW) 27, 2018, to EW 26, 2022. We selected two large towns (Yishun and Tampines) to adopt an expanding release strategy and two smaller towns (Bukit Batok and Choa Chu Kang) to adopt a targeted-release approach. Releases were conducted two times a week in high-rise public housing estates. All intervention and control locations practised the same baseline dengue control protocol. The main outcome was weekly dengue incidence rate caused by any dengue virus serotype. We used incidence data collected by the Singapore Ministry of Health to assess the efficacy of the interventions. To compare interventions, we used the synthetic control method to generate appropriate counterfactuals for the intervention towns using a weighted combination of 30 control towns between EW 1, 2014 and EW 26, 2022. FINDINGS Our study comprised an at-risk population of 607 872 individuals living in intervention sites and 3 894 544 individuals living in control sites. Interventions demonstrated up to 77·28% (121/156, 95% CI 75·81-78·58) intervention efficacy despite incomplete coverage across all towns until EW 26, 2022. Intervention efficacies increased as release coverage increased across all intervention sites. Releases led to 2242 (95% CI 2092-2391) fewer cases per 100 000 people in intervention sites during the study period. Secondary analysis showed that these intervention effects were replicated across all age groups and both sexes for intervention sites. INTERPRETATION Our results demonstrated the potential of Wolbachia-mediated incompatible insect technique for strengthening dengue control in tropical cities, where dengue burden is the greatest. FUNDING Singapore Ministry of Finance, Ministry of Sustainability, and the National Environment Agency, and the Singapore National Robotics Program.
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Affiliation(s)
- Jue Tao Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Environmental Health Institute, National Environment Agency, Singapore
| | - Somya Bansal
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Chee Seng Chong
- Environmental Health Institute, National Environment Agency, Singapore
| | - Borame Dickens
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Youming Ng
- Environmental Health Institute, National Environment Agency, Singapore
| | - Lu Deng
- Environmental Health Institute, National Environment Agency, Singapore
| | - Caleb Lee
- Environmental Health Institute, National Environment Agency, Singapore
| | - Li Yun Tan
- Environmental Health Institute, National Environment Agency, Singapore
| | - Grace Chain
- Environmental Health Institute, National Environment Agency, Singapore
| | - Pei Ma
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Shuzhen Sim
- Environmental Health Institute, National Environment Agency, Singapore
| | - Cheong Huat Tan
- Environmental Health Institute, National Environment Agency, Singapore
| | - Alex R Cook
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore
| | - Lee Ching Ng
- School of Biological Sciences, Nanyang Technological University, Singapore; Environmental Health Institute, National Environment Agency, Singapore.
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7
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Wang L, Huang AT, Katzelnick LC, Lefrancq N, Escoto AC, Duret L, Chowdhury N, Jarman R, Conte MA, Berry IM, Fernandez S, Klungthong C, Thaisomboonsuk B, Suntarattiwong P, Vandepitte W, Whitehead SS, Cauchemez S, Cummings DAT, Salje H. Antigenic distance between primary and secondary dengue infections correlates with disease risk. Sci Transl Med 2024; 16:eadk3259. [PMID: 38657027 DOI: 10.1126/scitranslmed.adk3259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 03/21/2024] [Indexed: 04/26/2024]
Abstract
Many pathogens continuously change their protein structure in response to immune-driven selection, resulting in weakened protection even in previously exposed individuals. In addition, for some pathogens, such as dengue virus, poorly targeted immunity is associated with increased risk of severe disease through a mechanism known as antibody-dependent enhancement. However, it remains unclear whether the antigenic distances between an individual's first infection and subsequent exposures dictate disease risk, explaining the observed large-scale differences in dengue hospitalizations across years. Here, we develop a framework that combines detailed antigenic and genetic characterization of viruses with details on hospitalized cases from 21 years of dengue surveillance in Bangkok, Thailand, to identify the role of the antigenic profile of circulating viruses in determining disease risk. We found that the risk of hospitalization depended on both the specific order of infecting serotypes and the antigenic distance between an individual's primary and secondary infections, with risk maximized at intermediate antigenic distances. These findings suggest that immune imprinting helps determine dengue disease risk and provide a pathway to monitor the changing risk profile of populations and to quantifying risk profiles of candidate vaccines.
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Affiliation(s)
- Lin Wang
- Department of Genetics, University of Cambridge, Cambridge CB2 1TN, UK
| | - Angkana T Huang
- Department of Genetics, University of Cambridge, Cambridge CB2 1TN, UK
| | - Leah C Katzelnick
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Noémie Lefrancq
- Department of Genetics, University of Cambridge, Cambridge CB2 1TN, UK
| | - Ana Coello Escoto
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Loréna Duret
- Department of Genetics, University of Cambridge, Cambridge CB2 1TN, UK
| | - Nayeem Chowdhury
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Richard Jarman
- Coalition for Epidemic Preparedness Initiative, Washington, DC 20006, USA
| | - Matthew A Conte
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Irina Maljkovic Berry
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Stefan Fernandez
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand
| | - Chonticha Klungthong
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand
| | - Butsaya Thaisomboonsuk
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand
| | | | - Warunee Vandepitte
- Queen Sirikit National Institute of Child Health, Bangkok 10400, Thailand
| | - Stephen S Whitehead
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Simon Cauchemez
- Mathematical Modelling of Infectious Diseases Unit, Institut Pasteur, Université Paris Cité, CNRS UMR 2000, Paris 75015, France
| | - Derek A T Cummings
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA
| | - Henrik Salje
- Department of Genetics, University of Cambridge, Cambridge CB2 1TN, UK
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL 32611, USA
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8
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Mercado-Hernandez R, Myers R, Carillo FB, Zambrana JV, López B, Sanchez N, Gordon A, Balmaseda A, Kuan G, Harris E. Obesity is associated with increased pediatric dengue virus infection and disease: A 9-year cohort study in Managua, Nicaragua. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.04.02.24305219. [PMID: 38633790 PMCID: PMC11023673 DOI: 10.1101/2024.04.02.24305219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Background Obesity is on the rise globally in adults and children, including in tropical areas where diseases such as dengue have a substantial burden, particularly in children. Obesity impacts the risk of severe dengue disease; however, the impact on dengue virus (DENV) infection and dengue cases remains an open question. Methods We used 9 years of data from 5,940 children in the Pediatric Dengue Cohort Study in Nicaragua to examine whether pediatric obesity is associated with increased susceptibility to DENV infection and symptomatic presentation. Analysis was performed using Generalized Estimating Equations adjusted for age, sex, and pre-infection DENV antibody titers. Results From 2011 to 2019, children contributed 26,273 person-years of observation, and we observed an increase in the prevalence of overweight (from 12% to 17%) and obesity (from 7% to 13%). There were 1,682 DENV infections and 476 dengue cases in the study population. Compared to participants with normal weight, participants with obesity had higher odds of DENV infection (Adjusted Odds Ratio [aOR] 1.21, 95% confidence interval [CI] 1.03-1.42) and higher odds of dengue disease given infection (aOR 1.59, 95% CI 1.15-2.19). Children with obesity infected with DENV showed increased odds of presenting fever (aOR 1.46, 95% CI 1.05-2.02), headache (aOR 1.51, 95% CI 1.07-2.14), and rash (aOR 2.26, 95% CI 1.49-3.44) when compared with children with normal weight. Conclusions Our results indicate that obesity is associated with increased susceptibility to DENV infection and dengue cases in children, independently of age, sex, and pre-infection DENV antibody titers.
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Affiliation(s)
- Reinaldo Mercado-Hernandez
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Rachel Myers
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Fausto Bustos Carillo
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - José Victor Zambrana
- Sustainable Sciences Institute, Managua, Nicaragua
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
| | - Brenda López
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Nery Sanchez
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Aubree Gordon
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
| | - Guillermina Kuan
- Sustainable Sciences Institute, Managua, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua, Nicaragua
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
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9
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Wong MP, Juan EYW, Pahmeier F, Chelluri SS, Wang P, Castillo-Rojas B, Blanc SF, Biering SB, Vance RE, Harris E. The inflammasome pathway is activated by dengue virus non-structural protein 1 and is protective during dengue virus infection. PLoS Pathog 2024; 20:e1012167. [PMID: 38662771 DOI: 10.1371/journal.ppat.1012167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 05/07/2024] [Accepted: 04/01/2024] [Indexed: 05/07/2024] Open
Abstract
Dengue virus (DENV) is a medically important flavivirus causing an estimated 50-100 million dengue cases annually, some of whom progress to severe disease. DENV non-structural protein 1 (NS1) is secreted from infected cells and has been implicated as a major driver of dengue pathogenesis by inducing endothelial barrier dysfunction. However, less is known about how DENV NS1 interacts with immune cells and what role these interactions play. Here we report that DENV NS1 can trigger activation of inflammasomes, a family of cytosolic innate immune sensors that respond to infectious and noxious stimuli, in mouse and human macrophages. DENV NS1 induces the release of IL-1β in a caspase-1 dependent manner. Additionally, we find that DENV NS1-induced inflammasome activation is independent of the NLRP3, Pyrin, and AIM2 inflammasome pathways, but requires CD14. Intriguingly, DENV NS1-induced inflammasome activation does not induce pyroptosis and rapid cell death; instead, macrophages maintain cellular viability while releasing IL-1β. Lastly, we show that caspase-1/11-deficient, but not NLRP3-deficient, mice are more susceptible to lethal DENV infection. Together, these results indicate that the inflammasome pathway acts as a sensor of DENV NS1 and plays a protective role during infection.
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Affiliation(s)
- Marcus P Wong
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Evan Y W Juan
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Felix Pahmeier
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Sai S Chelluri
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Phoebe Wang
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Bryan Castillo-Rojas
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Sophie F Blanc
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Scott B Biering
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Russell E Vance
- Division of Immunology and Molecular Medicine, Department of Molecular and Cell Biology University of California, Berkeley, Berkeley, California, United States of America
- Howard Hughes Medical Institute, University of California, Berkeley, California, United States of America
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
- Division of Immunology and Molecular Medicine, Department of Molecular and Cell Biology University of California, Berkeley, Berkeley, California, United States of America
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10
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Paz-Bailey G, Adams LE, Deen J, Anderson KB, Katzelnick LC. Dengue. Lancet 2024; 403:667-682. [PMID: 38280388 DOI: 10.1016/s0140-6736(23)02576-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 11/01/2023] [Accepted: 11/15/2023] [Indexed: 01/29/2024]
Abstract
Dengue, caused by four closely related viruses, is a growing global public health concern, with outbreaks capable of overwhelming health-care systems and disrupting economies. Dengue is endemic in more than 100 countries across tropical and subtropical regions worldwide, and the expanding range of the mosquito vector, affected in part by climate change, increases risk in new areas such as Spain, Portugal, and the southern USA, while emerging evidence points to silent epidemics in Africa. Substantial advances in our understanding of the virus, immune responses, and disease progression have been made within the past decade. Novel interventions have emerged, including partially effective vaccines and innovative mosquito control strategies, although a reliable immune correlate of protection remains a challenge for the assessment of vaccines. These developments mark the beginning of a new era in dengue prevention and control, offering promise in addressing this pressing global health issue.
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Affiliation(s)
| | - Laura E Adams
- Centers for Disease Control and Prevention, San Juan, Puerto Rico
| | - Jacqueline Deen
- Institute of Child Health and Human Development, National Institutes of Health, University of the Philippines, Manila, Philippines
| | - Kathryn B Anderson
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Leah C Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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11
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Narvaez F, Montenegro C, Juarez JG, Zambrana JV, Gonzalez K, Arguello S, Barrios F, Ojeda S, Plazaola M, Sanchez N, Camprubi D, Kuan G, Bailey GP, Harris E, Balmaseda A. Dengue severity by serotype in 19 years of pediatric clinical studies in Nicaragua. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.02.11.24302393. [PMID: 38405964 PMCID: PMC10889012 DOI: 10.1101/2024.02.11.24302393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Background Dengue virus, a major global health threat, consists of four serotypes (DENV1-4) that cause a range of clinical manifestations from mild to severe and potentially fatal disease. Methods This study, based on 19 years of data from the Pediatric Dengue Cohort Study and Pediatric Dengue Hospital-based Study in Managua, Nicaragua, investigates the influence of serotype and immune status on dengue severity. Study participants 6 months to 17 years old were followed during their hospital stay or as ambulatory patients, with dengue cases confirmed by molecular, serological, and/or virological methods. Results We enrolled a total of 14071 participants, of whom 2954 (21%) were positive for DENV infection. Of 2425 cases with serotype result by RT-PCR, 541 corresponded to DENV1, 996 to DENV2, 718 to DENV3 and 170 to DENV4. Severe disease was more prevalent among secondary DENV2 and DENV4 cases, while similar disease severity was observed in both primary and secondary DENV1 and DENV3 cases. According to the 1997 World Health Organization (WHO) severity classification, both DENV2 and DENV3 had a higher proportion of severe disease compared to other serotypes, whereas DENV3 had the greatest percentage of severity under the WHO-2009 classification. DENV2 was associated with pleural effusion and low platelet count, while DENV3 correlated with both hypotensive and compensated shock. Conclusions These findings emphasize the critical need for a dengue vaccine with balanced efficacy against all four serotypes, particularly as existing vaccines show variable efficacy by serotype and immune status, posing challenges for comprehensive protection, particularly in dengue-naïve individuals.
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Affiliation(s)
- Federico Narvaez
- Unidad de Infectología, Hospital Infantil Manuel de Jesús Rivera, Ministerio de Salud, Managua, Nicaragua
- Sustainable Sciences Institute, Managua, Nicaragua
| | | | | | - Jose Victor Zambrana
- Sustainable Sciences Institute, Managua, Nicaragua
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
| | - Karla Gonzalez
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
| | | | - Fanny Barrios
- Unidad de Infectología, Hospital Infantil Manuel de Jesús Rivera, Ministerio de Salud, Managua, Nicaragua
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Sergio Ojeda
- Sustainable Sciences Institute, Managua, Nicaragua
| | | | - Nery Sanchez
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Daniel Camprubi
- Dengue Branch, Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, San Juan, Puerto Rico
| | - Guillermina Kuan
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua, Nicaragua
| | - Gabriela Paz Bailey
- Dengue Branch, Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, San Juan, Puerto Rico
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, University of California, Berkeley, Berkeley, CA
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
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12
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Bos S, Graber AL, Cardona-Ospina JA, Duarte EM, Zambrana JV, Ruíz Salinas JA, Mercado-Hernandez R, Singh T, Katzelnick LC, de Silva A, Kuan G, Balmaseda A, Harris E. Protection against symptomatic dengue infection by neutralizing antibodies varies by infection history and infecting serotype. Nat Commun 2024; 15:382. [PMID: 38195666 PMCID: PMC10776616 DOI: 10.1038/s41467-023-44330-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 12/08/2023] [Indexed: 01/11/2024] Open
Abstract
Dengue viruses (DENV1-4) are the most prevalent arboviruses in humans and a major public health concern. Understanding immune mechanisms that modulate DENV infection outcome is critical for vaccine development. Neutralizing antibodies (nAbs) are an essential component of the protective immune response, yet their measurement often relies on a single cellular substrate and partially mature virions, which does not capture the full breadth of neutralizing activity and may lead to biased estimations of nAb potency. Here, we analyze 125 samples collected after one or more DENV infections but prior to subsequent symptomatic or inapparent DENV1, DENV2, or DENV3 infections from a long-standing pediatric cohort study in Nicaragua. By assessing nAb responses using Vero cells with or without DC-SIGN and with mature or partially mature virions, we find that nAb potency and the protective NT50 cutoff are greatly influenced by cell substrate and virion maturation state. Additionally, the correlation between nAb titer and protection from disease depends on prior infection history and infecting serotype. Finally, we uncover variations in nAb composition that contribute to protection from symptomatic infection differently after primary and secondary prior infection. These findings have important implications for identifying antibody correlates of protection for vaccines and natural infections.
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Affiliation(s)
- Sandra Bos
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA.
| | - Aaron L Graber
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Jaime A Cardona-Ospina
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
- Grupo de Investigación Biomedicina, Facultad de Medicina, Institución Universitaria Visión de las Américas, Pereira, Colombia
| | - Elias M Duarte
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Jose Victor Zambrana
- Sustainable Sciences Institute, Managua, Nicaragua
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | | | - Reinaldo Mercado-Hernandez
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Tulika Singh
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Leah C Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Aravinda de Silva
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC, USA
| | - Guillermina Kuan
- Sustainable Sciences Institute, Managua, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua, Nicaragua
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA.
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13
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Zardini A, Menegale F, Gobbi A, Manica M, Guzzetta G, d'Andrea V, Marziano V, Trentini F, Montarsi F, Caputo B, Solimini A, Marques-Toledo C, Wilke ABB, Rosà R, Marini G, Arnoldi D, Pastore Y Piontti A, Pugliese A, Capelli G, Della Torre A, Teixeira MM, Beier JC, Rizzoli A, Vespignani A, Ajelli M, Merler S, Poletti P. Estimating the potential risk of transmission of arboviruses in the Americas and Europe: a modelling study. Lancet Planet Health 2024; 8:e30-e40. [PMID: 38199719 DOI: 10.1016/s2542-5196(23)00252-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 10/19/2023] [Accepted: 10/30/2023] [Indexed: 01/12/2024]
Abstract
BACKGROUND Estimates of the spatiotemporal distribution of different mosquito vector species and the associated risk of transmission of arboviruses are key to design adequate policies for preventing local outbreaks and reducing the number of human infections in endemic areas. In this study, we quantified the abundance of Aedes albopictus and Aedes aegypti and the local transmission potential for three arboviral infections at an unprecedented spatiotemporal resolution in areas where no entomological surveillance is available. METHODS We developed a computational model to quantify the daily abundance of Aedes mosquitoes, leveraging temperature and precipitation records. The model was calibrated on mosquito surveillance data collected in 115 locations in Europe and the Americas between 2007 and 2018. Model estimates were used to quantify the reproduction number of dengue virus, Zika virus, and chikungunya in Europe and the Americas, at a high spatial resolution. FINDINGS In areas colonised by both Aedes species, A aegypti was estimated to be the main vector for the transmission of dengue virus, Zika virus, and chikungunya, being associated with a higher estimate of R0 when compared with A albopictus. Our estimates highlighted that these arboviruses were endemic in tropical and subtropical countries, with the highest risks of transmission found in central America, Venezuela, Colombia, and central-east Brazil. A non-negligible potential risk of transmission was also estimated for Florida, Texas, and Arizona (USA). The broader ecological niche of A albopictus could contribute to the emergence of chikungunya outbreaks and clusters of dengue autochthonous cases in temperate areas of the Americas, as well as in mediterranean Europe (in particular, in Italy, southern France, and Spain). INTERPRETATION Our results provide a comprehensive overview of the transmission potential of arboviral diseases in Europe and the Americas, highlighting areas where surveillance and mosquito control capacities should be prioritised. FUNDING EU and Ministero dell'Università e della Ricerca, Italy (Piano Nazionale di Ripresa e Resilienza Extended Partnership initiative on Emerging Infectious Diseases); EU (Horizon 2020); Ministero dell'Università e della Ricerca, Italy (Progetti di ricerca di Rilevante Interesse Nazionale programme); Brazilian National Council of Science, Technology and Innovation; Ministry of Health, Brazil; and Foundation of Research for Minas Gerais, Brazil.
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Affiliation(s)
- Agnese Zardini
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy
| | - Francesco Menegale
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Department of Mathematics, University of Trento, Trento, Italy
| | - Andrea Gobbi
- Digital Industry Center, Fondazione Bruno Kessler, Trento, Italy
| | - Mattia Manica
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy
| | - Giorgio Guzzetta
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy
| | - Valeria d'Andrea
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy
| | | | - Filippo Trentini
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Dondena Centre for Research on Social Dynamics and Public Policy, Bocconi University, Milan, Italy; Department of Decision Sciences, Bocconi University, Milan, Italy
| | - Fabrizio Montarsi
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy
| | - Beniamino Caputo
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, Rome, Italy
| | - Angelo Solimini
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, Rome, Italy
| | - Cecilia Marques-Toledo
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - André B B Wilke
- Laboratory for Computational Epidemiology and Public Health, Department of Epidemiology and Biostatistics, Indiana University School of Public Health, Bloomington, IN, USA
| | - Roberto Rosà
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy; Center Agriculture Food Environment, University of Trento, San Michele all'Adige, Trento, Italy
| | - Giovanni Marini
- Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy; Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Daniele Arnoldi
- Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy; Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Ana Pastore Y Piontti
- Laboratory for the Modeling of Biological and Socio-technical Systems, Northeastern University, Boston, MA, USA
| | - Andrea Pugliese
- Department of Mathematics, University of Trento, Trento, Italy
| | - Gioia Capelli
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy
| | - Alessandra Della Torre
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, Rome, Italy
| | - Mauro M Teixeira
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - John C Beier
- Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Annapaola Rizzoli
- Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy; Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Trento, Italy
| | - Alessandro Vespignani
- Laboratory for the Modeling of Biological and Socio-technical Systems, Northeastern University, Boston, MA, USA
| | - Marco Ajelli
- Laboratory for Computational Epidemiology and Public Health, Department of Epidemiology and Biostatistics, Indiana University School of Public Health, Bloomington, IN, USA
| | - Stefano Merler
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy
| | - Piero Poletti
- Center for Health Emergencies, Fondazione Bruno Kessler, Trento, Italy; Epilab-Joint Research Unit, Fondazione Edmund Mach-Fondazione Bruno Kessler Joint Research Unit, Trento, Italy.
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14
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Hamins-Puértolas M, Buddhari D, Salje H, Cummings DAT, Fernandez S, Farmer A, Kaewhiran S, Khampaen D, Iamsirithaworn S, Srikiatkhachorn A, Waickman A, Thomas SJ, Rothman AL, Endy T, Rodriguez-Barraquer I, Anderson KB. Household immunity and individual risk of infection with dengue virus in a prospective, longitudinal cohort study. Nat Microbiol 2024; 9:274-283. [PMID: 38110699 PMCID: PMC10895643 DOI: 10.1038/s41564-023-01543-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 11/02/2023] [Indexed: 12/20/2023]
Abstract
Although it is known that household infections drive the transmission of dengue virus (DENV), it is unclear how household composition and the immune status of inhabitants affect the individual risk of infection. Most population-based studies to date have focused on paediatric cohorts because more severe forms of dengue mainly occur in children, and the role of adults in dengue transmission is understudied. Here we analysed data from a multigenerational cohort study of 470 households, comprising 2,860 individuals, in Kamphaeng Phet, Thailand, to evaluate risk factors for DENV infection. Using a gradient-boosted regression model trained on annual haemagglutination inhibition antibody titre inputs, we identified 1,049 infections, 90% of which were subclinical. By analysing imputed infections, we found that individual antibody titres, household composition and antibody titres of other members in the same household affect an individual's risk of DENV infection. Those individuals living in households with high average antibody titres, or households with more adults, had a reduced risk of infection. We propose that herd immunity to dengue acts at the household level and may provide insight into the drivers of the recent change in the shifting age distribution of dengue cases in Thailand.
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Affiliation(s)
| | - Darunee Buddhari
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Henrik Salje
- Department of Genetics, University of Cambridge, Cambridge, UK
- Department of Biology, University of Florida, Gainesville, FL, USA
| | - Derek A T Cummings
- Department of Biology, University of Florida, Gainesville, FL, USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - Stefan Fernandez
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Aaron Farmer
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | | | | | - Anon Srikiatkhachorn
- Institute for Immunology and Informatics, Department of Cell and Molecular Biology, University of Rhode Island, Providence, RI, USA
- Faculty of Medicine, King Mongkut's Institute of Technology Ladkrabang, Bangkok, Thailand
| | - Adam Waickman
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Stephen J Thomas
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
- Institute for Global Health and Translational Sciences, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Alan L Rothman
- Institute for Immunology and Informatics, Department of Cell and Molecular Biology, University of Rhode Island, Providence, RI, USA
| | - Timothy Endy
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
- Coalition for Epidemic Preparedness Innovations (CEPI), Washington DC, USA
| | | | - Kathryn B Anderson
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, USA.
- Institute for Global Health and Translational Sciences, SUNY Upstate Medical University, Syracuse, NY, USA.
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15
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Katzelnick LC, Quentin E, Colston S, Ha TA, Andrade P, Eisenberg JNS, Ponce P, Coloma J, Cevallos V. Increasing transmission of dengue virus across ecologically diverse regions of Ecuador and associated risk factors. PLoS Negl Trop Dis 2024; 18:e0011408. [PMID: 38295108 PMCID: PMC10861087 DOI: 10.1371/journal.pntd.0011408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 02/12/2024] [Accepted: 01/15/2024] [Indexed: 02/02/2024] Open
Abstract
The distribution and intensity of viral diseases transmitted by Aedes aegypti mosquitoes, including dengue, have rapidly increased over the last century. Here, we study dengue virus (DENV) transmission across the ecologically and demographically distinct regions or Ecuador. We analyzed province-level age-stratified dengue incidence data from 2000-2019 using catalytic models to estimate the force of infection of DENV over eight decades. We found that provinces established endemic DENV transmission at different time periods. Coastal provinces with the largest and most connected cities had the earliest and highest increase in DENV transmission, starting around 1980 and continuing to the present. In contrast, remote and rural areas with reduced access, like the northern coast and the Amazon regions, experienced a rise in DENV transmission and endemicity only in the last 10 to 20 years. The newly introduced chikungunya and Zika viruses have age-specific distributions of hospital-seeking cases consistent with recent emergence across all provinces. To evaluate factors associated with geographic differences in DENV transmission potential, we modeled DENV vector risk using 11,693 Aedes aegypti presence points to the resolution of 1 hectare. In total, 56% of the population of Ecuador, including in provinces identified as having increasing DENV transmission in our models, live in areas with high risk of Aedes aegypti, with population size, trash collection, elevation, and access to water as important determinants. Our investigation serves as a case study of the changes driving the expansion of DENV and other arboviruses globally and suggest that control efforts should be expanded to semi-urban and rural areas and to historically isolated regions to counteract increasing dengue outbreaks.
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Affiliation(s)
- Leah C. Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Emmanuelle Quentin
- Centro de Investigación en Salud Pública y Epidemiología Clínica (CISPEC), Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Ecuador
| | - Savannah Colston
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Thien-An Ha
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Paulina Andrade
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Joseph N. S. Eisenberg
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Patricio Ponce
- Centro de Investigación en Enfermedades Infeciosas y Vectoriales (CIREV), Instituto Nacional de Investigación en Salud Pública (INSPI), Quito, Ecuador
| | - Josefina Coloma
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, United States of America
| | - Varsovia Cevallos
- Centro de Investigación en Enfermedades Infeciosas y Vectoriales (CIREV), Instituto Nacional de Investigación en Salud Pública (INSPI), Quito, Ecuador
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16
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Maraschin M, Talyuli OAC, Luíza Rulff da Costa C, Granella LW, Moi DA, Figueiredo BRS, Mansur DS, Oliveira PL, Oliveira JHM. Exploring dose-response relationships in Aedes aegypti survival upon bacteria and arbovirus infection. JOURNAL OF INSECT PHYSIOLOGY 2023; 151:104573. [PMID: 37838284 DOI: 10.1016/j.jinsphys.2023.104573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/16/2023]
Abstract
A detailed understanding of how host fitness changes in response to variations in microbe density (an ecological measure of disease tolerance) is an important aim of infection biology. Here, we applied dose-response curves to study Aedes aegypti survival upon exposure to different microbes. We challenged female mosquitoes with Listeria monocytogenes, a model bacterial pathogen, Dengue 4 virus and Zika virus, two medically relevant arboviruses, to understand the distribution of mosquito survival following microbe exposure. By correlating microbe loads and host health, we found that a blood meal promotes disease tolerance in our systemic bacterial infection model and that mosquitoes orally infected with bacteria had an enhanced defensive capacity than insects infected through injection. We also showed that Aedes aegypti displays a higher survival profile following arbovirus infection when compared to bacterial infections. Here, we applied a framework for investigating microbe-induced mosquito mortality and details how the lifespan of Aedes aegypti varies with different inoculum sizes of bacteria and arboviruses.
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Affiliation(s)
- Mariana Maraschin
- Departamento de Microbiologia, Imunologia e Parasitologia. Universidade Federal de Santa Catarina. Florianópolis, Brazil
| | - Octávio A C Talyuli
- Instituto de Bioquímica Médica Leopoldo de Meis. Universidade Federal do Rio de Janeiro. Rio de Janeiro, Brazil
| | - Clara Luíza Rulff da Costa
- Instituto de Bioquímica Médica Leopoldo de Meis. Universidade Federal do Rio de Janeiro. Rio de Janeiro, Brazil
| | - Lucilene W Granella
- Departamento de Microbiologia, Imunologia e Parasitologia. Universidade Federal de Santa Catarina. Florianópolis, Brazil
| | - Dieison A Moi
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-862, Brazil
| | - Bruno R S Figueiredo
- Graduate Program in Ecology, Department of Ecology and Zoology, Federal University of Santa Catarina, Campus Universitário, Edifício Fritz Müller, Bloco B, Córrego Grande, CEP 88040-970, Florianópolis, Santa Catarina, Brazil
| | - Daniel S Mansur
- Departamento de Microbiologia, Imunologia e Parasitologia. Universidade Federal de Santa Catarina. Florianópolis, Brazil
| | - Pedro L Oliveira
- Instituto de Bioquímica Médica Leopoldo de Meis. Universidade Federal do Rio de Janeiro. Rio de Janeiro, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular. Brazil
| | - José Henrique M Oliveira
- Departamento de Microbiologia, Imunologia e Parasitologia. Universidade Federal de Santa Catarina. Florianópolis, Brazil; Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular. Brazil.
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17
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Zambrana JV, Hasund CM, Aogo RA, Bos S, Arguello S, Gonzalez K, Collado D, Miranda T, Kuan G, Gordon A, Balmaseda A, Katzelnick L, Harris E. Primary exposure to Zika virus increases risk of symptomatic dengue virus infection with serotypes 2, 3, and 4 but not serotype 1. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.11.29.23299187. [PMID: 38077039 PMCID: PMC10705633 DOI: 10.1101/2023.11.29.23299187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Infection with any of the four dengue virus serotypes (DENV1-4) can protect against or enhance subsequent dengue depending on pre-existing antibodies and the subsequent infecting serotype. Additionally, primary infection with the related flavivirus Zika virus (ZIKV) has been shown to increase DENV2 disease. Here, we measured how prior DENV and ZIKV immunity influenced risk of disease caused by all four serotypes in a pediatric Nicaraguan cohort. Of 3,412 participants in 2022, 10.6% experienced symptomatic DENV infections caused by DENV1 (n=139), DENV4 (n=133), DENV3 (n=54), DENV2 (n=9), or an undetermined serotype (n=39). Longitudinal clinical and serological data were used to define infection histories, and generalized linear and additive models adjusted for age, sex, time since the last infection, cohort year, and repeat measurements were used to predict disease risk. Compared to flavivirus-naïve participants, primary ZIKV infection increased disease risk of DENV4 (relative risk = 2.62, 95% confidence interval: 1.48-4.63) and DENV3 (2.90, 1.34-6.27) but not DENV1 (1.20, 0.72-1.99). Primary DENV infection or a DENV followed by ZIKV infection also increased DENV4 risk. We re-analyzed 19 years of cohort data and demonstrated that prior flavivirus-immunity and pre-existing antibody titer differentially affected disease risk for incoming serotypes, increasing risk of DENV2 and DENV4, protecting against DENV1, and protecting at high titers but enhancing at low titers against DENV3. We thus find that prior ZIKV infection, like prior DENV infection, increases risk of certain DENV serotypes. Cross-reactivity among flaviviruses should be carefully considered when assessing vaccine safety and efficacy.
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Affiliation(s)
- Jose Victor Zambrana
- Sustainable Sciences Institute; Managua, Nicaragua
- Department of Epidemiology, School of Public Health, University of Michigan; Ann Arbor, MI, USA
| | - Chloe M. Hasund
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda; MD, USA
| | - Rosemary A. Aogo
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda; MD, USA
| | - Sandra Bos
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | | | - Karla Gonzalez
- Sustainable Sciences Institute; Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud; Managua, Nicaragua
| | | | | | - Guillermina Kuan
- Sustainable Sciences Institute; Managua, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud; Managua, Nicaragua
| | - Aubree Gordon
- Department of Epidemiology, School of Public Health, University of Michigan; Ann Arbor, MI, USA
| | - Angel Balmaseda
- Sustainable Sciences Institute; Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud; Managua, Nicaragua
| | - Leah Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda; MD, USA
| | - Eva Harris
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
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18
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Keelapang P, Ketloy C, Puttikhunt C, Sriburi R, Prompetchara E, Sae-Lim M, Siridechadilok B, Duangchinda T, Noisakran S, Charoensri N, Suriyaphol P, Suparattanagool P, Utaipat U, Masrinoul P, Avirutnan P, Mongkolsapaya J, Screaton G, Auewarakul P, Malaivijitnond S, Yoksan S, Malasit P, Ruxrungtham K, Pulmanausahakul R, Sittisombut N. Heterologous prime-boost immunization induces protection against dengue virus infection in cynomolgus macaques. J Virol 2023; 97:e0096323. [PMID: 37846984 PMCID: PMC10688363 DOI: 10.1128/jvi.00963-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 09/06/2023] [Indexed: 10/18/2023] Open
Abstract
IMPORTANCE Currently licensed dengue vaccines do not induce long-term protection in children without previous exposure to dengue viruses in nature. These vaccines are based on selected attenuated strains of the four dengue serotypes and employed in combination for two or three consecutive doses. In our search for a better dengue vaccine candidate, live attenuated strains were followed by non-infectious virus-like particles or the plasmids that generate these particles upon injection into the body. This heterologous prime-boost immunization induced elevated levels of virus-specific antibodies and helped to prevent dengue virus infection in a high proportion of vaccinated macaques. In macaques that remained susceptible to dengue virus, distinct mechanisms were found to account for the immunization failures, providing a better understanding of vaccine actions. Additional studies in humans in the future may help to establish whether this combination approach represents a more effective means of preventing dengue by vaccination.
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Affiliation(s)
- Poonsook Keelapang
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Chutitorn Ketloy
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Chunya Puttikhunt
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Rungtawan Sriburi
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Eakachai Prompetchara
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Laboratory Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Malinee Sae-Lim
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Bunpote Siridechadilok
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Frontier Biodesign and Bioengineering Research Team, National Center for Genetic Engineering and Biotechnology, Pathumthani, Thailand
| | - Thaneeya Duangchinda
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sansanee Noisakran
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nicha Charoensri
- Center for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Prapat Suriyaphol
- Siriraj Informatics and Data Innovation Center, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Utaiwan Utaipat
- Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Promsin Masrinoul
- Center for Vaccine Development, Institute of Molecular Biosciences, Mahidol University at Salaya, Nakhon Pathom, Thailand
| | - Panisadee Avirutnan
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Juthathip Mongkolsapaya
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Gavin Screaton
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Prasert Auewarakul
- Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Sutee Yoksan
- Center for Vaccine Development, Institute of Molecular Biosciences, Mahidol University at Salaya, Nakhon Pathom, Thailand
| | - Prida Malasit
- Molecular Biology of Dengue and Flaviviruses Research Team, Medical Molecular Biotechnology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
- Division of Dengue Hemorrhagic Fever Research, Siriraj Center of Research Excellence in Dengue and Emerging Pathogens, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kiat Ruxrungtham
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | | | - Nopporn Sittisombut
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
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19
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Pascar J, Middleton H, Dorus S. Aedes aegypti microbiome composition covaries with the density of Wolbachia infection. MICROBIOME 2023; 11:255. [PMID: 37978413 PMCID: PMC10655336 DOI: 10.1186/s40168-023-01678-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/27/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Wolbachia is a widespread bacterial endosymbiont that can inhibit vector competency when stably transinfected into the mosquito, Aedes aegypti, a primary vector of the dengue virus (DENV) and other arboviruses. Although a complete mechanistic understanding of pathogen blocking is lacking, it is likely to involve host immunity induction and resource competition between Wolbachia and DENV, both of which may be impacted by microbiome composition. The potential impact of Wolbachia transinfection on host fitness is also of importance given the widespread release of mosquitos infected with the Drosophila melanogaster strain of Wolbachia (wMel) in wild populations. Here, population-level genomic data from Ae. aegypti was surveyed to establish the relationship between the density of wMel infection and the composition of the host microbiome. RESULTS Analysis of genomic data from 172 Ae. aegypti females across six populations resulted in an expanded and quantitatively refined, species-level characterization of the bacterial, archaeal, and fungal microbiome. This included 844 species of bacteria across 23 phyla, of which 54 species were found to be ubiquitous microbiome members across these populations. The density of wMel infection was highly variable between individuals and negatively correlated with microbiome diversity. Network analyses revealed wMel as a hub comprised solely of negative interactions with other bacterial species. This contrasted with the large and highly interconnected network of other microbiome species that may represent members of the midgut microbiome community in this population. CONCLUSION Our bioinformatic survey provided a species-level characterization of Ae. aegypti microbiome composition and variation. wMel load varied substantially across populations and individuals and, importantly, wMel was a major hub of a negative interactions across the microbiome. These interactions may be an inherent consequence of heightened pathogen blocking in densely infected individuals or, alternatively, may result from antagonistic Wolbachia-incompatible bacteria that could impede the efficacy of wMel as a biological control agent in future applications. The relationship between wMel infection variation and the microbiome warrants further investigation in the context of developing wMel as a multivalent control agent against other arboviruses. Video Abstract.
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Affiliation(s)
- Jane Pascar
- Center for Reproductive Evolution, Department of Biology, Syracuse University, Syracuse, NY, USA
| | - Henry Middleton
- Center for Reproductive Evolution, Department of Biology, Syracuse University, Syracuse, NY, USA
| | - Steve Dorus
- Center for Reproductive Evolution, Department of Biology, Syracuse University, Syracuse, NY, USA.
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20
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Vicco A, McCormack CP, Pedrique B, Amuasi JH, Awuah AAA, Obirikorang C, Struck NS, Lorenz E, May J, Ribeiro I, Malavige GN, Donnelly CA, Dorigatti I. A simulation-based method to inform serosurvey design for estimating the force of infection using existing blood samples. PLoS Comput Biol 2023; 19:e1011666. [PMID: 38011203 PMCID: PMC10727435 DOI: 10.1371/journal.pcbi.1011666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 12/18/2023] [Accepted: 11/06/2023] [Indexed: 11/29/2023] Open
Abstract
The extent to which dengue virus has been circulating globally and especially in Africa is largely unknown. Testing available blood samples from previous cross-sectional serological surveys offers a convenient strategy to investigate past dengue infections, as such serosurveys provide the ideal data to reconstruct the age-dependent immunity profile of the population and to estimate the average per-capita annual risk of infection: the force of infection (FOI), which is a fundamental measure of transmission intensity. In this study, we present a novel methodological approach to inform the size and age distribution of blood samples to test when samples are acquired from previous surveys. The method was used to inform SERODEN, a dengue seroprevalence survey which is currently being conducted in Ghana among other countries utilizing samples previously collected for a SARS-CoV-2 serosurvey. The method described in this paper can be employed to determine sample sizes and testing strategies for different diseases and transmission settings.
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Affiliation(s)
- Anna Vicco
- Department of Molecular Medicine, University of Padua, Padua, Italy
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Clare P. McCormack
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Belen Pedrique
- Drugs for Neglected Diseases initiative, Geneva, Switzerland
| | - John H. Amuasi
- Department of Global Health, School of Public Health, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
- Global Health and Infectious Diseases Research Group, Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
- Research Group Global One Health, Department of Implementation Research, Bernhard Nocht Institute of Tropical Medicine, Hamburg, Germany
- Division for Tropical Medicine, Department of Medicine, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Anthony Afum-Adjei Awuah
- Global Health and Infectious Diseases Research Group, Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
- Research Group Global One Health, Department of Implementation Research, Bernhard Nocht Institute of Tropical Medicine, Hamburg, Germany
- Department of Molecular Medicine, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Christian Obirikorang
- Global Health and Infectious Diseases Research Group, Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana
- Research Group Global One Health, Department of Implementation Research, Bernhard Nocht Institute of Tropical Medicine, Hamburg, Germany
- Department of Molecular Medicine, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Nicole S. Struck
- Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- German Center for Infection Research (DZIF), partner site Hamburg-Borstel-Lübeck-Riems, Germany
| | - Eva Lorenz
- Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- German Center for Infection Research (DZIF), partner site Hamburg-Borstel-Lübeck-Riems, Germany
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Centre of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Jürgen May
- Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- German Center for Infection Research (DZIF), partner site Hamburg-Borstel-Lübeck-Riems, Germany
- Department of Tropical Medicine I, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Isabela Ribeiro
- Drugs for Neglected Diseases initiative, Geneva, Switzerland
| | | | - Christl A. Donnelly
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
- Department of Statistics, University of Oxford, Oxford, United Kingdom
- Pandemic Sciences Institute, University of Oxford, Oxford, United Kingdom
| | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
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21
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Lim AY, Jafari Y, Caldwell JM, Clapham HE, Gaythorpe KAM, Hussain-Alkhateeb L, Johansson MA, Kraemer MUG, Maude RJ, McCormack CP, Messina JP, Mordecai EA, Rabe IB, Reiner RC, Ryan SJ, Salje H, Semenza JC, Rojas DP, Brady OJ. A systematic review of the data, methods and environmental covariates used to map Aedes-borne arbovirus transmission risk. BMC Infect Dis 2023; 23:708. [PMID: 37864153 PMCID: PMC10588093 DOI: 10.1186/s12879-023-08717-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/16/2023] [Indexed: 10/22/2023] Open
Abstract
BACKGROUND Aedes (Stegomyia)-borne diseases are an expanding global threat, but gaps in surveillance make comprehensive and comparable risk assessments challenging. Geostatistical models combine data from multiple locations and use links with environmental and socioeconomic factors to make predictive risk maps. Here we systematically review past approaches to map risk for different Aedes-borne arboviruses from local to global scales, identifying differences and similarities in the data types, covariates, and modelling approaches used. METHODS We searched on-line databases for predictive risk mapping studies for dengue, Zika, chikungunya, and yellow fever with no geographical or date restrictions. We included studies that needed to parameterise or fit their model to real-world epidemiological data and make predictions to new spatial locations of some measure of population-level risk of viral transmission (e.g. incidence, occurrence, suitability, etc.). RESULTS We found a growing number of arbovirus risk mapping studies across all endemic regions and arboviral diseases, with a total of 176 papers published 2002-2022 with the largest increases shortly following major epidemics. Three dominant use cases emerged: (i) global maps to identify limits of transmission, estimate burden and assess impacts of future global change, (ii) regional models used to predict the spread of major epidemics between countries and (iii) national and sub-national models that use local datasets to better understand transmission dynamics to improve outbreak detection and response. Temperature and rainfall were the most popular choice of covariates (included in 50% and 40% of studies respectively) but variables such as human mobility are increasingly being included. Surprisingly, few studies (22%, 31/144) robustly tested combinations of covariates from different domains (e.g. climatic, sociodemographic, ecological, etc.) and only 49% of studies assessed predictive performance via out-of-sample validation procedures. CONCLUSIONS Here we show that approaches to map risk for different arboviruses have diversified in response to changing use cases, epidemiology and data availability. We identify key differences in mapping approaches between different arboviral diseases, discuss future research needs and outline specific recommendations for future arbovirus mapping.
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Affiliation(s)
- Ah-Young Lim
- Department of Infectious Disease Epidemiology and Dynamics, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
- Centre for Mathematical Modelling of Infectious Diseases, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
| | - Yalda Jafari
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Jamie M Caldwell
- High Meadows Environmental Institute, Princeton University, Princeton, NJ, USA
| | - Hannah E Clapham
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
| | - Katy A M Gaythorpe
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Laith Hussain-Alkhateeb
- School of Public Health and Community Medicine, Sahlgrenska Academy, Institute of Medicine, Global Health, University of Gothenburg, Gothenburg, Sweden
- Population Health Research Section, King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Michael A Johansson
- Dengue Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, San Juan, Puerto Rico, USA
| | | | - Richard J Maude
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Clare P McCormack
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, UK
| | - Jane P Messina
- School of Geography and the Environment, University of Oxford, Oxford, UK
- Oxford School of Global and Area Studies, University of Oxford, Oxford, UK
| | - Erin A Mordecai
- Department of Biology, Stanford University, Stanford, CA, USA
| | - Ingrid B Rabe
- Department of Epidemic and Pandemic Preparedness and Prevention, World Health Organization, Geneva, Switzerland
| | - Robert C Reiner
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - Sadie J Ryan
- Department of Geography and Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - Henrik Salje
- Department of Genetics, University of Cambridge, Cambridge, UK
| | - Jan C Semenza
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
| | - Diana P Rojas
- Department of Epidemic and Pandemic Preparedness and Prevention, World Health Organization, Geneva, Switzerland
| | - Oliver J Brady
- Department of Infectious Disease Epidemiology and Dynamics, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
- Centre for Mathematical Modelling of Infectious Diseases, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
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22
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Bos S, Graber AL, Cardona-Ospina JA, Duarte EM, Zambrana JV, Ruíz Salinas JA, Mercado-Hernandez R, Singh T, Katzelnick LC, de Silva A, Kuan G, Balmaseda A, Harris E. The association of neutralizing antibodies with protection against symptomatic dengue virus infection varies by serotype, prior infection history, and assay condition. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.06.20.23291522. [PMID: 37502957 PMCID: PMC10371115 DOI: 10.1101/2023.06.20.23291522] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
The four dengue virus serotypes (DENV1-4) are the most prevalent arboviruses in humans and a major public health concern worldwide. Understanding immune mechanisms that modulate DENV infection outcome is critical for epidemic preparedness and development of a safe and effective vaccine. Neutralizing antibodies (nAbs) are an essential component of the protective response, yet their measurement often relies on a single cellular substrate and partially mature virions, which do not capture the full breadth of neutralizing activity and may lead to biased estimations of nAb potency. Here, we investigated the characteristics of nAbs associated with protection against dengue cases using samples collected after one or more DENV infections but prior to subsequent symptomatic or inapparent DENV1, DENV2, or DENV3 infections from a long- standing pediatric cohort study in Nicaragua. By assessing nAb responses using Vero cells with or without the attachment factor DC-SIGN and with mature or partially mature virions, we found that nAb potency and the protective NT 50 cutoff were greatly influenced by cell substrate and virion maturation state. Additionally, the correlation between nAb titer and protection from disease depended on an individual's prior infection history and the subsequent infecting DENV serotype. Finally, we uncovered variations in nAbs composition that contributed to protection from symptomatic DENV infection differently after primary and secondary prior infection. These findings have important implications for identifying antibody correlates of protection in the context of vaccines and natural infections.
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23
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Ledien J, Cucunubá ZM, Parra-Henao G, Rodríguez-Monguí E, Dobson AP, Adamo SB, Castellanos LG, Basáñez MG, Nouvellet P. From serological surveys to disease burden: a modelling pipeline for Chagas disease. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220278. [PMID: 37598701 PMCID: PMC10440172 DOI: 10.1098/rstb.2022.0278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 06/29/2023] [Indexed: 08/22/2023] Open
Abstract
In 2012, the World Health Organization (WHO) set the elimination of Chagas disease intradomiciliary vectorial transmission as a goal by 2020. After a decade, some progress has been made, but the new 2021-2030 WHO roadmap has set even more ambitious targets. Innovative and robust modelling methods are required to monitor progress towards these goals. We present a modelling pipeline using local seroprevalence data to obtain national disease burden estimates by disease stage. Firstly, local seroprevalence information is used to estimate spatio-temporal trends in the Force-of-Infection (FoI). FoI estimates are then used to predict such trends across larger and fine-scale geographical areas. Finally, predicted FoI values are used to estimate disease burden based on a disease progression model. Using Colombia as a case study, we estimated that the number of infected people would reach 506 000 (95% credible interval (CrI) = 395 000-648 000) in 2020 with a 1.0% (95%CrI = 0.8-1.3%) prevalence in the general population and 2400 (95%CrI = 1900-3400) deaths (approx. 0.5% of those infected). The interplay between a decrease in infection exposure (FoI and relative proportion of acute cases) was overcompensated by a large increase in population size and gradual population ageing, leading to an increase in the absolute number of Chagas disease cases over time. This article is part of the theme issue 'Challenges and opportunities in the fight against neglected tropical diseases: a decade from the London Declaration on NTDs'.
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Affiliation(s)
- Julia Ledien
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9RH, UK
| | - Zulma M. Cucunubá
- Departamento de Epidemiología Clínica y Bioestadística, Facultad de Medicina, Universidad Pontificia Javeriana, 110231 Bogotá, Colombia
| | - Gabriel Parra-Henao
- Centro de Investigación en Salud para el Trópico, Universidad Cooperativa de Colombia, 470002, Santa Marta, Colombia
- National Institute of Health, 111321 Bogotá, Colombia
| | - Eliana Rodríguez-Monguí
- Departamento de Epidemiología Clínica y Bioestadística, Facultad de Medicina, Universidad Pontificia Javeriana, 110231 Bogotá, Colombia
- Independent consultant to the Neglected, Tropical and Vector Borne Diseases Program, Pan American Health Organization (PAHO), Colombia
| | - Andrew P. Dobson
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA
| | - Susana B. Adamo
- Center for International Earth Science Information Network (CIESIN), Columbia Climate School, Columbia University, New York, NY 10025, USA
| | - Luis Gerardo Castellanos
- Department of Communicable Diseases and Environmental Determinants of Health, Pan American Health Organization (PAHO), Washington, DC 20037, USA
| | - María-Gloria Basáñez
- London Centre for Neglected Tropical Disease Research (LCNTDR) & MRC Centre for Global Infectious Disease Analysis (GIDA), Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London SW7 2AZ, UK
| | - Pierre Nouvellet
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9RH, UK
- London Centre for Neglected Tropical Disease Research (LCNTDR) & MRC Centre for Global Infectious Disease Analysis (GIDA), Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London SW7 2AZ, UK
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24
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Tran VT, Inward RPD, Gutierrez B, Nguyen NM, Nguyen PT, Rajendiran I, Cao TT, Duong KTH, Kraemer MUG, Yacoub S. Reemergence of Cosmopolitan Genotype Dengue Virus Serotype 2, Southern Vietnam. Emerg Infect Dis 2023; 29:2180-2182. [PMID: 37735803 PMCID: PMC10521597 DOI: 10.3201/eid2910.230529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023] Open
Abstract
We performed phylogenetic analysis on dengue virus serotype 2 Cosmopolitan genotype in Ho Chi Minh City, Vietnam. We document virus emergence, probable routes of introduction, and timeline of events. Our findings highlight the need for continuous, systematic genomic surveillance to manage outbreaks and forecast future epidemics.
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Wong MP, Juan EYW, Chelluri SS, Wang P, Pahmeier F, Castillo-Rojas B, Blanc SF, Biering SB, Vance RE, Harris E. The Inflammasome Pathway is Activated by Dengue Virus Non-structural Protein 1 and is Protective During Dengue Virus Infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.21.558875. [PMID: 37790301 PMCID: PMC10543007 DOI: 10.1101/2023.09.21.558875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Dengue virus (DENV) is a medically important flavivirus causing an estimated 50-100 million dengue cases annually, some of whom progress to severe disease. DENV non-structural protein 1 (NS1) is secreted from infected cells and has been implicated as a major driver of dengue pathogenesis by inducing endothelial barrier dysfunction. However, less is known about how DENV NS1 interacts with immune cells and what role these interactions play. Here we report that DENV NS1 can trigger activation of inflammasomes, a family of cytosolic innate immune sensors that respond to infectious and noxious stimuli, in mouse and human macrophages. DENV NS1 induces the release of IL-1β in a caspase-1 dependent manner. Additionally, we find that DENV NS1-induced inflammasome activation is independent of the NLRP3, Pyrin, and AIM2 inflammasome pathways, but requires CD14. Intriguingly, DENV NS1-induced inflammasome activation does not induce pyroptosis and rapid cell death; instead, macrophages maintain cellular viability while releasing IL-1β. Lastly, we show that caspase-1/11-deficient, but not NLRP3-deficient, mice are more susceptible to lethal DENV infection. Together, these results indicate that the inflammasome pathway acts as a sensor of DENV NS1 and plays a protective role during infection.
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Affiliation(s)
- Marcus P Wong
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Evan Y W Juan
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Sai S Chelluri
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Phoebe Wang
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Felix Pahmeier
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Bryan Castillo-Rojas
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Sophie F Blanc
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Scott B Biering
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
| | - Russell E Vance
- Division of Immunology and Molecular Medicine, Department of Molecular and Cell Biology University of California, Berkeley, Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California, Berkeley, California, USA
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
- Infectious Diseases and Immunity Graduate Group, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
- Division of Immunology and Molecular Medicine, Department of Molecular and Cell Biology University of California, Berkeley, Berkeley, CA, USA
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Asish PR, Dasgupta S, Rachel G, Bagepally BS, Girish Kumar CP. Global prevalence of asymptomatic dengue infections - a systematic review and meta-analysis. Int J Infect Dis 2023; 134:292-298. [PMID: 37463631 DOI: 10.1016/j.ijid.2023.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 06/20/2023] [Accepted: 07/13/2023] [Indexed: 07/20/2023] Open
Abstract
OBJECTIVES The burden of asymptomatic dengue infections is understudied. Therefore, we systematically reviewed the literature to estimate the global prevalence of asymptomatic dengue infections. METHODS We searched cross-sectional studies reporting the prevalence of asymptomatic dengue infections from PubMed, Scopus, and Embase. Prevalence of asymptomatic dengue infections was pooled and reported as proportions with a 95% confidence interval (CI). This systematic review protocol was a priori registered in The International Prospective Register of Systematic Reviews (Reg: No. CRD42020218446). RESULTS We included 41 studies with 131,953 cases in our analysis. The overall pooled prevalence of asymptomatic dengue infections was 59.26% (95% CI: 43.76-74.75, I2 = 99.93%), with 65.52% (95% CI: 38.73-92.32, I2 = 99.95%) during outbreaks and 30.78% (95% CI: 21.39-40.16, I2 = 98.78%) during non-outbreak periods. The pooled prevalence among the acutely infected individuals was 54.52% (95% CI: 17.73-46.76, I2 = 99.91%), whereas, among primary and secondary asymptomatic dengue infections, it was 65.36% (95% CI: 45.76-84.96, I2 = 98.82) and 48.99% (95% CI: 27.85-70.13, I2 = 99.08%) respectively. CONCLUSION The majority of dengue cases are asymptomatic and may play a significant role in disease transmission. Public health strategies aimed at dengue outbreak response and mitigation of disease burden should include early detection of asymptomatic cases.
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Affiliation(s)
| | | | - Gladys Rachel
- ICMR-National Institute of Epidemiology, Chennai, India
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27
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Jones AM, Saretsky TL, Panter C, Wells JR, White F, Smith V, Kendal H, Russell K, Ruggieri M, Calhoun SR, Gater A, O'Hagan J, Anderson KB, Paz-Soldan VA, Morrison AC, Ware L, Klick M, Thomas S, Marks MA. Measuring dengue illness intensity: Development and content validity of the dengue virus daily diary (DENV-DD). J Patient Rep Outcomes 2023; 7:84. [PMID: 37610665 PMCID: PMC10447358 DOI: 10.1186/s41687-023-00624-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 08/01/2023] [Indexed: 08/24/2023] Open
Abstract
BACKGROUND Dengue is the most prevalent arboviral infection causing an estimated 50-60 million cases of febrile illness globally per year, exacting considerable disease burden. Few instruments exist to assess the patient illness experience, with most based on healthcare provider assessment, lacking standardization in timepoints and symptom assessment. This study aimed to evaluate the content validity of the novel 'Dengue Virus Daily Diary (DENV-DD)', designed to measure symptom intensity and disease burden within outpatient infant to adult populations. METHODS The Dengue Illness Index Report Card was used as a foundation to create the DENV-DD, consisting of patient- and observer-reported outcome (PRO/ObsRO) instruments. In two South American dengue-endemic communities, qualitative combined concept elicitation and cognitive debriefing interviews were conducted among individuals and caregivers of children with symptomatic laboratory-confirmed dengue. Interviews were conducted across two rounds allowing DENV-DD modifications. A small-scale quantitative assessment of the DENV-DD was also conducted with data from an independent Dengue Human Infection Model (DHIM) to generate early evidence of feasibility of DENV-DD completion, instrument performance and insight into the sign/symptom trajectory over the course of illness. RESULTS Forty-eight participants were interviewed (20 adults, 20 older children/adolescents with their caregivers, 8 caregivers of younger children). A wide spectrum of signs/symptoms lasting 3-15 days were reported with fever, headache, body ache/pain, loss of appetite, and body weakness each reported by > 70% participants. DENV-DD instructions, items and response scales were understood, and items were considered relevant across ages. DHIM data supported feasibility of DENV-DD completion. CONCLUSIONS Findings demonstrate content validity of the DENV-DD (PRO/ObsRO instruments) in dengue-endemic populations. Psychometric and cultural validity studies are ongoing to support use of the DENV-DD in clinical studies.
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Affiliation(s)
- Amy M Jones
- Adelphi Values Ltd., Patient Centered Outcomes, Cheshire, UK.
| | | | | | | | - Frances White
- Adelphi Values Ltd., Patient Centered Outcomes, Cheshire, UK
| | - Verity Smith
- Adelphi Values Ltd., Patient Centered Outcomes, Cheshire, UK
| | - Helen Kendal
- Adelphi Values Ltd., Patient Centered Outcomes, Cheshire, UK
| | | | | | | | - Adam Gater
- Adelphi Values Ltd., Patient Centered Outcomes, Cheshire, UK
| | | | - Kathryn B Anderson
- Institute for Global Health and Translational Sciences, State University of New York, Upstate Medical University, Syracuse, NY, USA
| | - Valerie A Paz-Soldan
- Department of Tropical Medicine, Tulane School of Public Health and Tropical Medicine, New Orleans, LA, USA
| | - Amy C Morrison
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Lisa Ware
- Institute for Global Health and Translational Sciences, State University of New York, Upstate Medical University, Syracuse, NY, USA
| | - Michelle Klick
- Institute for Global Health and Translational Sciences, State University of New York, Upstate Medical University, Syracuse, NY, USA
| | - Stephen Thomas
- Institute for Global Health and Translational Sciences, State University of New York, Upstate Medical University, Syracuse, NY, USA
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Sharp TM, Tufa AJ, Cotter CJ, Lozier MJ, Santiago GA, Johnson SS, Mataia'a M, Waterman SH, Muñoz-Jordán JL, Paz-Bailey G, Hemme RR, Schmaedick MA, Anesi S. Identification of risk factors and mosquito vectors associated with dengue virus infection in American Samoa, 2017. PLOS GLOBAL PUBLIC HEALTH 2023; 3:e0001604. [PMID: 37418355 DOI: 10.1371/journal.pgph.0001604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 01/25/2023] [Indexed: 07/09/2023]
Abstract
INTRODUCTION The first outbreak of dengue in American Samoa was reported in 1911. Sporadic outbreaks have been reported since, as were outbreaks of other pathogens transmitted by Aedes species mosquitoes including Ross River, chikungunya, and Zika viruses. During an outbreak of dengue virus-type 2 (DENV-2) in 2016-2018, we conducted household-based cluster investigations to identify population-specific risk factors associated with infection and performed entomologic surveillance to determine the relative abundance of Ae. aegypti and Ae. polynesiensis. METHODS AND FINDINGS We contacted dengue patients who had tested positive for DENV infection and offered them as well as their household members participation in household-based cluster investigations. For those that accepted participation, we also offered participation to residents of households within a 50-meter radius of each case-patient's home. Questionnaires were administered and serum specimens collected for testing by RT-PCR and anti-DENV IgM ELISA. Adult female mosquitoes were aspirated from inside and outside participating households and tested by RT-PCR. We analyzed characteristics associated with DENV infection in bivariate analyses. A total of 226 participants was enrolled from 91 households in 20 clusters. Median age of participants was 34 years (range: <1-94), and 56.2% were female. In total, 7 (3.2%) participants had evidence of DENV infection by IgM ELISA (n = 5) or RT-PCR (n = 2). Factors significantly associated with DENV infection were reporting a febrile illness in the past three months (prevalence ratio: 7.5 [95% confidence interval: 1.9-29.8]) and having a household septic tank (Fisher's Exact Test, p = 0.004). Of 93 Ae. aegypti and 90 Ae. polynesiensis females collected, 90% of Ae. aegypti were collected inside homes whereas 83% of Ae. polynesiensis were collected outside homes. DENV nucleic acid was not detected in any mosquito pools. Sequencing of the DENV-2 from patient specimens identified the Cosmopolitan genotype of DENV-2 and was most closely related to virus detected in the Solomon Islands during 2016. CONCLUSIONS This investigation demonstrated that dengue is a continuing risk in American Samoa. Increased frequency of infection among residents with a septic tank suggests a need to investigate whether septic tanks serve as larval habitats for mosquito vectors of DENV in American Samoa. Future efforts should also evaluate the role of Ae. polynesiensis in DENV transmission in the wild.
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Affiliation(s)
- Tyler M Sharp
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
- United States Public Health Service, Silver Springs, Maryland, United States of America
| | - A John Tufa
- Pacific Island Health Officers' Association, Honolulu, Hawaii, United States of America
- American Samoa Department of Health, Pago Pago, American Samoa
| | - Caitlin J Cotter
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
- United States Public Health Service, Silver Springs, Maryland, United States of America
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Matthew J Lozier
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
- United States Public Health Service, Silver Springs, Maryland, United States of America
| | - Gilberto A Santiago
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
| | - Stephanie S Johnson
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
- Applied Epidemiology Fellowship, Council of State and Territorial Epidemiologists, Atlanta, Georgia, United States of America
| | - Mary Mataia'a
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Stephen H Waterman
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
- United States Public Health Service, Silver Springs, Maryland, United States of America
| | - Jorge L Muñoz-Jordán
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
| | - Gabriela Paz-Bailey
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
| | - Ryan R Hemme
- Dengue Branch, Centers for Disease Control and Prevention, San Juan, Puerto Rico
| | | | - Scott Anesi
- American Samoa Department of Health, Pago Pago, American Samoa
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Katzelnick LC, Quentin E, Colston S, Ha TA, Andrade P, Eisenberg JN, Ponce P, Coloma J, Cevallos V. Increasing transmission of dengue virus across ecologically diverse regions of Ecuador and associated risk factors. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.05.25.23290519. [PMID: 37398346 PMCID: PMC10312896 DOI: 10.1101/2023.05.25.23290519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
The distribution and intensity of viral diseases transmitted by Aedes aegypti mosquitoes, including dengue, have rapidly increased over the last century. Ecuador is an interesting country to study drivers of dengue virus (DENV) transmission given it has multiple ecologically and demographically distinct regions. Here, we analyze province-level age-stratified dengue prevalence data from 2000-2019 using catalytic models to estimate the force of infection of DENV over eight decades and across provinces in Ecuador. We found that provinces established endemic DENV transmission at different time periods. Coastal provinces with the largest and most connected cities had the earliest and highest increase in DENV transmission, starting around 1980 and continuing to the present. In contrast, remote and rural areas with reduced access, like the northern coast and the Amazon regions, experienced a rise in DENV transmission and endemicity only in the last 10 to 20 years. The newly introduced chikungunya and Zika viruses have distinct age-specific prevalence distributions consistent with recent emergence across all provinces. We evaluated factors to the resolution of 1 hectare associated with geographic differences in vector suitability and arbovirus disease in the last 10 years by modeling 11,693 A aegypti presence points and 73,550 arbovirus cases. In total, 56% of the population of Ecuador lives in areas with high risk of Aedes aegypti. Most suitable provinces had hotspots for arbovirus disease risk, with population size, elevation, sewage connection, trash collection, and access to water as important determinants. Our investigation serves as a case study of the changes driving the expansion of DENV and other arboviruses globally and suggest that control efforts should be expanded to semi-urban and rural areas and to historically isolated regions to counteract increasing dengue outbreaks.
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Affiliation(s)
- Leah C. Katzelnick
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-3203, USA
| | - Emmanuelle Quentin
- Centro de Investigación en Salud Pública y Epidemiología Clínica, Universidad Tecnológica Equinoccial, Quito, 170129, Ecuador
| | - Savannah Colston
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA
| | - Thien-An Ha
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
| | - Paulina Andrade
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
| | - Joseph N.S. Eisenberg
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, 48109-2029, USA
| | - Patricio Ponce
- Centro de Investigación en Enfermedades Infeciosas y Vectoriales (CIREV), Instituto Nacional de Investigación en Salud Pública (INSPI), Quito, 170136, Ecuador
| | - Josefina Coloma
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
| | - Varsovia Cevallos
- Centro de Investigación en Enfermedades Infeciosas y Vectoriales (CIREV), Instituto Nacional de Investigación en Salud Pública (INSPI), Quito, 170136, Ecuador
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30
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Kaagaard MD, Matos LO, Evangelista MVP, Wegener A, Holm AE, Vestergaard LS, Do Valle SCN, Silvestre OM, Lacerda MVG, de Souza RM, Barreto Dos Santos F, Biering-Sørensen T, Brainin P. Frequency of pleural effusion in dengue patients by severity, age and imaging modality: a systematic review and meta-analysis. BMC Infect Dis 2023; 23:327. [PMID: 37189054 PMCID: PMC10184094 DOI: 10.1186/s12879-023-08311-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/06/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND Identification of pleural effusion (PE) in dengue infection is an objective measure of plasma leakage and may predict disease progression. However, no studies have systematically assessed the frequency of PE in patients with dengue, and whether this differs across age and imaging modality. METHODS We searched Pubmed, Embase Web of Science and Lilacs (period 1900-2021) for studies reporting on PE in dengue patients (hospitalized and outpatient). We defined PE as fluid in the thoracic cavity detected by any imaging test. The study was registered in PROSPERO (CRD42021228862). Complicated dengue was defined as hemorrhagic fever, dengue shock syndrome or severe dengue. RESULTS The search identified 2,157 studies of which 85 studies were eligible for inclusion. The studies (n = 31 children, n = 10 adults, n = 44 mixed age) involved 12,800 patients (30% complicated dengue). The overall frequency of PE was 33% [95%CI: 29 to 37%] and the rate of PE increased significantly with disease severity (P = 0.001) such that in complicated vs. uncomplicated dengue the frequencies were 48% and 17% (P < 0.001). When assessing all studies, PE occurred significantly more often in children compared to adults (43% vs. 13%, P = 0.002) and lung ultrasound more frequently detected PE than conventional chest X-ray (P = 0.023). CONCLUSIONS We found that 1/3 of dengue patients presented with PE and the frequency increased with severity and younger age. Importantly, lung ultrasound demonstrated the highest rate of detection. Our findings suggest that PE is a relatively common finding in dengue and that bedside imaging tools, such as lung ultrasound, potentially may enhance detection.
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Affiliation(s)
- Molly D Kaagaard
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil.
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev-Gentofte University Hospital, Hellerup, Denmark.
| | - Luan Oliveira Matos
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
| | - Marliton V P Evangelista
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
| | - Alma Wegener
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev-Gentofte University Hospital, Hellerup, Denmark
| | - Anna Engell Holm
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev-Gentofte University Hospital, Hellerup, Denmark
| | - Lasse S Vestergaard
- Department of Bacteria, Parasites and Fungi, National Malaria Reference Laboratory, Statens Serum Institut, Copenhagen, Denmark
| | - Suiane C N Do Valle
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
| | - Odilson M Silvestre
- Health and Sport Science Center, Federal University of Acre, Rio Branco, Acre, Brazil
| | | | - Rodrigo Medeiros de Souza
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
| | | | - Tor Biering-Sørensen
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev-Gentofte University Hospital, Hellerup, Denmark
- Faculty of Biomedical Sciences, Copenhagen University, Copenhagen, Denmark
| | - Philip Brainin
- Multidisciplinary Center, Federal University of Acre, Campus Floresta, Cruzeiro do Sul, Acre, Brazil
- Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev-Gentofte University Hospital, Hellerup, Denmark
- Sound Bioventures, Hellerup, Denmark
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31
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Lin DCD, Weng SC, Tsao PN, Chu JJH, Shiao SH. Co-infection of dengue and Zika viruses mutually enhances viral replication in the mosquito Aedes aegypti. Parasit Vectors 2023; 16:160. [PMID: 37165438 PMCID: PMC10172068 DOI: 10.1186/s13071-023-05778-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 04/16/2023] [Indexed: 05/12/2023] Open
Abstract
BACKGROUND The mosquito Aedes aegypti transmits two of the most serious mosquito-borne viruses, dengue virus (DENV) and Zika virus (ZIKV), which results in significant human morbidity and mortality worldwide. The quickly shifting landscapes of DENV and ZIKV endemicity worldwide raise concerns that their co-circulation through the Ae. aegypti mosquito vector could greatly exacerbate the disease burden in humans. Recent reports have indicated an increase in the number of co-infection cases in expanding co-endemic regions; however, the impact of co-infection on viral infection and the detailed molecular mechanisms remain to be defined. METHODS C6/36 (Aedes albopictus) cells were cultured in Dulbecco's modified Eagle medium/Mitsuhashi and Maramorosch Insect Medium (DMEM/MM) (1:1) containing 2% heat-inactivated fetal bovine serum and 1× penicillin/streptomycin solution. For virus propagation, the cells were infected with either DENV serotype 2 (DENV2) strain 16681 or ZIKV isolate Thailand/1610acTw (MF692778.1). Mosquitoes (Ae. aegypti UGAL [University of Georgia Laboratory]/Rockefeller strain) were orally infected with DENV2 and ZIKV through infectious blood-feeding. RESULTS We first examined viral replication activity in cells infected simultaneously, or sequentially, with DENV and ZIKV, and found interspecies binding of viral genomic transcripts to the non-structural protein 5 (NS5). When we challenged Ae. aegypti mosquitos with both DENV2 and ZIKV sequentially to probe similar interactions, virus production and vector susceptibility to infection were significantly enhanced. CONCLUSIONS Our results suggest that DENV2 and ZIKV simultaneously establishing infection in the Ae. aegypti mosquito vector may augment one another during replication. The data also implicate the homologous NS5 protein as a key intersection between the flaviviruses in co-infection, highlighting it as a potential target for vector control.
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Affiliation(s)
- Daniel Chieh-Ding Lin
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Shih-Che Weng
- Department of Tropical Medicine and Parasitology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Po-Nien Tsao
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
- Research Center for Developmental Biology & Regenerative Medicine, National Taiwan University, Taipei, Taiwan
| | - Justin Jang Hann Chu
- Laboratory of Molecular RNA Virology and Antiviral Strategies, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Shin-Hong Shiao
- Department of Tropical Medicine and Parasitology, College of Medicine, National Taiwan University, Taipei, Taiwan.
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32
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Rodriguez DM, Major CG, Sánchez-González L, Jones E, Delorey MJ, Alonso C, Rivera-Amill V, Paz-Bailey G, Adams LE. Dengue vaccine acceptability before and after the availability of COVID-19 vaccines in Puerto Rico. Vaccine 2023:S0264-410X(23)00516-9. [PMID: 37173267 PMCID: PMC10160531 DOI: 10.1016/j.vaccine.2023.04.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 04/30/2023] [Indexed: 05/15/2023]
Abstract
Dengue is a growing public health threat, causing approximately 400 million infections annually. In June 2021, the Advisory Committee on Immunization Practices recommended the first dengue vaccine (CYD-TDV) for children aged 9-16 years with a previous dengue infection, living in endemic areas, such as Puerto Rico (PR). As the COVID-19 pandemic affected vaccine intention worldwide, we assessed dengue vaccine intention before (pre-COVID) and after (post-COVID) COVID-19 vaccine availability among participants enrolled in the Communities Organized to Prevent Arboviruses (COPA) cohort to prepare for dengue vaccine implementation in PR. We used logistic regression models to evaluate changes in dengue vaccine intention by interview timing and participant characteristics. Among 2,513 participants pre-COVID, 2,512 answered the dengue vaccine intention question for themselves, and 1,564 answered relative to their children. Post-COVID, dengue vaccine intention in adults increased for themselves from 73.4% to 84.5% (adjusted odds ratio (aOR) = 2.27, 95%CI: 1.90-2.71) and relative to their children from 75.6% to 85.5% (aOR = 2.21, 95%CI: 1.75-2.78). Among all participants, groups with higher dengue vaccine intention included those who reported previous year influenza vaccine uptake and those who reported being frequently bitten by mosquitos, compared to those who did not. Adult males were also more likely to intend to vaccinate themselves than females. Respondents who were employed or in school were less likely to intend to vaccinate compared to those who were not working. The primary reasons for vaccine hesitancy were concerns with side effects and not believing in vaccines, which should be considered during educational strategies prior to dengue vaccine implementation. In general, dengue vaccine intention is high in PR and has increased after COVID-19 vaccine availability, potentially due to increased awareness of vaccine importance during the COVID-19 pandemic.
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Affiliation(s)
- Dania M Rodriguez
- Centers for Disease Control and Prevention, Dengue Branch, 1324 Calle Canada, San Juan 00920, Puerto Rico.
| | - Chelsea G Major
- Centers for Disease Control and Prevention, Dengue Branch, 1324 Calle Canada, San Juan 00920, Puerto Rico.
| | - Liliana Sánchez-González
- Centers for Disease Control and Prevention, Dengue Branch, 1324 Calle Canada, San Juan 00920, Puerto Rico.
| | - Emma Jones
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, 3156 Rampart Road, Fort Collins, CO 80521, United States.
| | - Mark J Delorey
- Centers for Disease Control and Prevention, Division of Vector-borne Diseases, 3156 Rampart Road, Fort Collins, CO 80521, United States.
| | - Claudia Alonso
- Columbia University Mailman School of Public Health, 722 West 168th St., New York, NY 10032, United States.
| | - Vanessa Rivera-Amill
- Ponce Health Sciences University/Ponce Research Institute, 395 Dr Luis F Sala Street, Ponce 00716, Puerto Rico.
| | - Gabriela Paz-Bailey
- Centers for Disease Control and Prevention, Dengue Branch, 1324 Calle Canada, San Juan 00920, Puerto Rico.
| | - Laura E Adams
- Centers for Disease Control and Prevention, Dengue Branch, 1324 Calle Canada, San Juan 00920, Puerto Rico.
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Joseph D, Ramachandran R, Alzabut J, Jose SA, Khan H. A Fractional-Order Density-Dependent Mathematical Model to Find the Better Strain of Wolbachia. Symmetry (Basel) 2023. [DOI: 10.3390/sym15040845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
The primary objective of the current study was to create a mathematical model utilizing fractional-order calculus for the purpose of analyzing the symmetrical characteristics of Wolbachia dissemination among Aedesaegypti mosquitoes. We investigated various strains of Wolbachia to determine the most sustainable one through predicting their dynamics. Wolbachia is an effective tool for controlling mosquito-borne diseases, and several strains have been tested in laboratories and released into outbreak locations. This study aimed to determine the symmetrical features of the most efficient strain from a mathematical perspective. This was accomplished by integrating a density-dependent death rate and the rate of cytoplasmic incompatibility (CI) into the model to examine the spread of Wolbachia and non-Wolbachia mosquitoes. The fractional-order mathematical model developed here is physically meaningful and was assessed for equilibrium points in the presence and absence of disease. Eight equilibrium points were determined, and their local and global stability were determined using the Routh–Hurwitz criterion and linear matrix inequality theory. The basic reproduction number was calculated using the next-generation matrix method. The research also involved conducting numerical simulations to evaluate the behavior of the basic reproduction number for different equilibrium points and identify the optimal CI value for reducing disease spread.
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Affiliation(s)
- Dianavinnarasi Joseph
- Centre for Nonlinear Systems, Chennai Institute of Technology, Chennai 600069, Tamil Nadu, India
| | - Raja Ramachandran
- Ramanujan Centre for Higher Mathematics, Alagappa University, Karaikudi 630004, India
- Department of Computer Science and Mathematics, Lebanese American University, Beirut 1102-2801, Lebanon
| | - Jehad Alzabut
- Department of Mathematics and Sciences, Prince Sultan University, Riyadh 11586, Saudi Arabia
- Department of Industrial Engineering, OSTIM Technical University, Ankara 06374, Turkey
| | - Sayooj Aby Jose
- Department of Mathematics, Alagappa University, Karaikudi 630004, India
- School of Mathematics & Statistics, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - Hasib Khan
- Department of Mathematics and Sciences, Prince Sultan University, Riyadh 11586, Saudi Arabia
- Department of Mathematics, Shaheed Benazir Bhutto University Sheringal Dir Upper, Khyber Pakhtunkhwa 18000, Pakistan
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Safadi DE, Lebeau G, Lagrave A, Mélade J, Grondin L, Rosanaly S, Begue F, Hoareau M, Veeren B, Roche M, Hoarau JJ, Meilhac O, Mavingui P, Desprès P, Viranaïcken W, Krejbich-Trotot P. Extracellular Vesicles Are Conveyors of the NS1 Toxin during Dengue Virus and Zika Virus Infection. Viruses 2023; 15:v15020364. [PMID: 36851578 PMCID: PMC9965858 DOI: 10.3390/v15020364] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/19/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
Extracellular vesicles (EVs), produced during viral infections, are of emerging interest in understanding infectious processes and host-pathogen interactions. EVs and exosomes in particular have the natural ability to transport nucleic acids, proteins, and other components of cellular or viral origin. Thus, they participate in intercellular communication, immune responses, and infectious and pathophysiological processes. Some viruses are known to hijack the cell production and content of EVs for their benefit. Here, we investigate whether two pathogenic flaviviruses i.e., Zika Virus (ZIKV) and Dengue virus (DENV2) could have an impact on the features of EVs. The analysis of EVs produced by infected cells allowed us to identify that the non-structural protein 1 (NS1), described as a viral toxin, is associated with exosomes. This observation could be confirmed under conditions of overexpression of recombinant NS1 from each flavivirus. Using different isolation methods (i.e., exosome isolation kit, size exclusion chromatography, Polyethylene Glycol enrichment, and ELISA capture), we showed that NS1 was present as a dimer at the surface of excreted exosomes, and that this association could occur in the extracellular compartment. This finding could be of major importance in a physiological context. Indeed, this capacity of NS1 to address EVs and its implication in the pathophysiology during Dengue or Zika diseases should be explored. Furthermore, exosomes that have demonstrated a natural capacity to vectorize NS1 could serve as useful tools for vaccine development.
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Affiliation(s)
- Daed El Safadi
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Grégorie Lebeau
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Alisé Lagrave
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Julien Mélade
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Lauriane Grondin
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Sarah Rosanaly
- Unité Mixte Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de la Réunion, INSERM, UMR 1188, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Floran Begue
- Unité Mixte Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de la Réunion, INSERM, UMR 1188, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Mathilde Hoareau
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Bryan Veeren
- Unité Mixte Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de la Réunion, INSERM, UMR 1188, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Marjolaine Roche
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Jean-Jacques Hoarau
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Olivier Meilhac
- Unité Mixte Diabète Athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de la Réunion, INSERM, UMR 1188, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Patrick Mavingui
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Philippe Desprès
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
| | - Wildriss Viranaïcken
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
- Correspondence: (W.V.); (P.K.-T.)
| | - Pascale Krejbich-Trotot
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Saint-Denis de La Réunion, France
- Correspondence: (W.V.); (P.K.-T.)
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35
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Hernandez B, Stiff O, Ming DK, Ho Quang C, Nguyen Lam V, Nguyen Minh T, Nguyen Van Vinh C, Nguyen Minh N, Nguyen Quang H, Phung Khanh L, Dong Thi Hoai T, Dinh The T, Huynh Trung T, Wills B, Simmons CP, Holmes AH, Yacoub S, Georgiou P. Learning meaningful latent space representations for patient risk stratification: Model development and validation for dengue and other acute febrile illness. Front Digit Health 2023; 5:1057467. [PMID: 36910574 PMCID: PMC9992802 DOI: 10.3389/fdgth.2023.1057467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/05/2023] [Indexed: 02/24/2023] Open
Abstract
Background Increased data availability has prompted the creation of clinical decision support systems. These systems utilise clinical information to enhance health care provision, both to predict the likelihood of specific clinical outcomes or evaluate the risk of further complications. However, their adoption remains low due to concerns regarding the quality of recommendations, and a lack of clarity on how results are best obtained and presented. Methods We used autoencoders capable of reducing the dimensionality of complex datasets in order to produce a 2D representation denoted as latent space to support understanding of complex clinical data. In this output, meaningful representations of individual patient profiles are spatially mapped in an unsupervised manner according to their input clinical parameters. This technique was then applied to a large real-world clinical dataset of over 12,000 patients with an illness compatible with dengue infection in Ho Chi Minh City, Vietnam between 1999 and 2021. Dengue is a systemic viral disease which exerts significant health and economic burden worldwide, and up to 5% of hospitalised patients develop life-threatening complications. Results The latent space produced by the selected autoencoder aligns with established clinical characteristics exhibited by patients with dengue infection, as well as features of disease progression. Similar clinical phenotypes are represented close to each other in the latent space and clustered according to outcomes broadly described by the World Health Organisation dengue guidelines. Balancing distance metrics and density metrics produced results covering most of the latent space, and improved visualisation whilst preserving utility, with similar patients grouped closer together. In this case, this balance is achieved by using the sigmoid activation function and one hidden layer with three neurons, in addition to the latent dimension layer, which produces the output (Pearson, 0.840; Spearman, 0.830; Procrustes, 0.301; GMM 0.321). Conclusion This study demonstrates that when adequately configured, autoencoders can produce two-dimensional representations of a complex dataset that conserve the distance relationship between points. The output visualisation groups patients with clinically relevant features closely together and inherently supports user interpretability. Work is underway to incorporate these findings into an electronic clinical decision support system to guide individual patient management.
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Affiliation(s)
- Bernard Hernandez
- Centre for Bio-Inspired Technology, Imperial College London, London, United Kingdom.,Centre for Amtimicrobial Optimisation, Imperial College London, London, United Kingdom
| | - Oliver Stiff
- Centre for Bio-Inspired Technology, Imperial College London, London, United Kingdom
| | - Damien K Ming
- Centre for Amtimicrobial Optimisation, Imperial College London, London, United Kingdom.,NIHR HPRU in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, London, United Kingdom
| | - Chanh Ho Quang
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Vuong Nguyen Lam
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | | | - Chau Nguyen Van Vinh
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | | | - Huy Nguyen Quang
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Lam Phung Khanh
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | | | - Trung Dinh The
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Trieu Huynh Trung
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - Bridget Wills
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Cameron P Simmons
- Institute of Vector Borne Disease, Monash University, Melbourne, VIC, Australia
| | - Alison H Holmes
- Centre for Amtimicrobial Optimisation, Imperial College London, London, United Kingdom.,NIHR HPRU in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, London, United Kingdom
| | - Sophie Yacoub
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Pantelis Georgiou
- Centre for Bio-Inspired Technology, Imperial College London, London, United Kingdom.,Centre for Amtimicrobial Optimisation, Imperial College London, London, United Kingdom
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Palanichamy Kala M, St. John AL, Rathore APS. Dengue: Update on Clinically Relevant Therapeutic Strategies and Vaccines. CURRENT TREATMENT OPTIONS IN INFECTIOUS DISEASES 2023; 15:27-52. [PMID: 37124673 PMCID: PMC10111087 DOI: 10.1007/s40506-023-00263-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2023] [Indexed: 05/02/2023]
Abstract
Dengue viruses (DENV) continue to circulate worldwide, resulting in a significant burden on human health. There are four antigenically distinct serotypes of DENV, an infection of which could result in a potentially life-threatening disease. Current treatment options are limited and rely on supportive care. Although one dengue vaccine is approved for dengue-immune individuals and has modest efficacy, there is still a need for therapeutics and vaccines that can reduce dengue morbidities and lower the infection burden. There have been recent advances in the development of promising drugs for the treatment of dengue. These include direct antivirals that can reduce virus replication as well as host-targeted drugs for reducing inflammation and/or vascular pathologies. There are also new vaccine candidates that are being evaluated for their safety and efficacy in preventing dengue disease. This review highlights nuances in the current standard-of-care treatment of dengue. We also discuss emerging treatment options, therapeutic drugs, and vaccines that are currently being pursued at various stages of preclinical and clinical development.
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Affiliation(s)
- Monica Palanichamy Kala
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, 8 College Rd., Level 9, Singapore, 169857 Singapore
| | - Ashley L. St. John
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, 8 College Rd., Level 9, Singapore, 169857 Singapore
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- SingHealth Duke-NUS Global Health Institute, Singapore, Singapore
- Department of Pathology, Duke University Medical Center, 207 Research Rd, Durham, NC 27705 USA
| | - Abhay P. S. Rathore
- Department of Pathology, Duke University Medical Center, 207 Research Rd, Durham, NC 27705 USA
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37
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Ong J, Ho SH, Soh SXH, Wong Y, Ng Y, Vasquez K, Lai YL, Setoh YX, Chong CS, Lee V, Wong JCC, Tan CH, Sim S, Ng LC, Lim JT. Assessing the efficacy of male Wolbachia-infected mosquito deployments to reduce dengue incidence in Singapore: study protocol for a cluster-randomized controlled trial. Trials 2022; 23:1023. [PMID: 36528590 PMCID: PMC9758775 DOI: 10.1186/s13063-022-06976-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 12/02/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Dengue is a severe environmental public health challenge in tropical and subtropical regions. In Singapore, decreasing seroprevalence and herd immunity due to successful vector control has paradoxically led to increased transmission potential of the dengue virus. We have previously demonstrated that incompatible insect technique coupled with sterile insect technique (IIT-SIT), which involves the release of X-ray-irradiated male Wolbachia-infected mosquitoes, reduced the Aedes aegypti population by 98% and dengue incidence by 88%. This novel vector control tool is expected to be able to complement current vector control to mitigate the increasing threat of dengue on a larger scale. We propose a multi-site protocol to study the efficacy of IIT-SIT at reducing dengue incidence. METHODS/DESIGN The study is designed as a parallel, two-arm, non-blinded cluster-randomized (CR) controlled trial to be conducted in high-rise public housing estates in Singapore, an equatorial city-state. The aim is to determine whether large-scale deployment of male Wolbachia-infected Ae. aegypti mosquitoes can significantly reduce dengue incidence in intervention clusters. We will use the CR design, with the study area comprising 15 clusters with a total area of 10.9 km2, covering approximately 722,204 residents in 1713 apartment blocks. Eight clusters will be randomly selected to receive the intervention, while the other seven will serve as non-intervention clusters. Intervention efficacy will be estimated through two primary endpoints: (1) odds ratio of Wolbachia exposure distribution (i.e., probability of living in an intervention cluster) among laboratory-confirmed reported dengue cases compared to test-negative controls and (2) laboratory-confirmed reported dengue counts normalized by population size in intervention versus non-intervention clusters. DISCUSSION This study will provide evidence from a multi-site, randomized controlled trial for the efficacy of IIT-SIT in reducing dengue incidence. The trial will provide valuable information to estimate intervention efficacy for this novel vector control approach and guide plans for integration into national vector control programs in dengue-endemic settings. TRIAL REGISTRATION ClinicalTrials.gov, identifier: NCT05505682 . Registered on 16 August 2022. Retrospectively registered.
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Affiliation(s)
- Janet Ong
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Soon Hoe Ho
- Environmental Health Institute, National Environment Agency, Singapore, Singapore.
| | - Stacy Xin Hui Soh
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Yvonne Wong
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Youming Ng
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Kathryn Vasquez
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Yee Ling Lai
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Yin Xiang Setoh
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Chee-Seng Chong
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Vernon Lee
- Communicable Diseases Division, Ministry of Health, Singapore, Singapore
| | | | - Cheong Huat Tan
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Shuzhen Sim
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Lee Ching Ng
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
| | - Jue Tao Lim
- Environmental Health Institute, National Environment Agency, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University Novena Campus, Singapore, Singapore
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38
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Bonnin L, Tran A, Herbreteau V, Marcombe S, Boyer S, Mangeas M, Menkes C. Predicting the Effects of Climate Change on Dengue Vector Densities in Southeast Asia through Process-Based Modeling. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:127002. [PMID: 36473499 PMCID: PMC9726451 DOI: 10.1289/ehp11068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
BACKGROUND Aedes aegypti and Ae. albopictus mosquitoes are major vectors for several human diseases of global importance, such as dengue and yellow fever. Their life cycles and hosted arboviruses are climate sensitive and thus expected to be impacted by climate change. Most studies investigating climate change impacts on Aedes at global or continental scales focused on their future global distribution changes, whereas a single study focused on its effects on Ae. aegypti densities regionally. OBJECTIVES A process-based approach was used to model densities of Ae. aegypti and Ae. albopictus and their potential evolution with climate change using a panel of nine CMIP6 climate models and climate scenarios ranging from strong to low mitigation measures at the Southeast Asian scale and for the next 80 y. METHODS The process-based model described, through a system of ordinary differential equations, the variations of mosquito densities in 10 compartments, corresponding to 10 different stages of mosquito life cycle, in response to temperature and precipitation variations. Local field data were used to validate model outputs. RESULTS We show that both species densities will globally increase due to future temperature increases. In Southeast Asia by the end of the century, Ae. aegypti densities are expected to increase from 25% with climate mitigation measures to 46% without; Ae. albopictus densities are expected to increase from 13%-21%, respectively. However, we find spatially contrasted responses at the seasonal scales with a significant decrease in Ae. albopictus densities in lowlands during summer in the future. DISCUSSION These results contrast with previous results, which brings new insight on the future impacts of climate change on Aedes densities. Major sources of uncertainties, such as mosquito model parametrization and climate model uncertainties, were addressed to explore the limits of such modeling. https://doi.org/10.1289/EHP11068.
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Affiliation(s)
- Lucas Bonnin
- ENTROPIE (UMR 9220), IRD, Université de la Réunion, CNRS, Ifremer, Université de Nouvelle Calédonie, Nouméa, Nouvelle-Calédonie
| | - Annelise Tran
- CIRAD, UMR TETIS, Sainte-Clotilde, Reunion Island, France
- TETIS, Université Montpellier, AgroParisTech, CIRAD, CNRS, INRAE, Montpellier, France
- CIRAD, UMR ASTRE, Sainte-Clotilde, Reunion Island, France
- ASTRE, Université Montpellier, CIRAD, INRAE, Montpellier, France
| | - Vincent Herbreteau
- ESPACE-DEV, IRD, Université Antilles, Université Guyane, Université Montpellier, Université de la Réunion, Montpellier, France
- ESPACE-DEV, IRD, Université Antilles, Université Guyane, Université Montpellier, Université de la Réunion, Phnom Penh, Cambodia
| | - Sébastien Marcombe
- Medical Entomology and Vector-Borne Disease Laboratory, Institut Pasteur du Laos, Vientiane, Lao PDR
| | - Sébastien Boyer
- Medical and Veterinary Entomology Unit, Institut Pasteur du Cambodge, Phnom Penh, Cambodia
| | - Morgan Mangeas
- ENTROPIE (UMR 9220), IRD, Université de la Réunion, CNRS, Ifremer, Université de Nouvelle Calédonie, Nouméa, Nouvelle-Calédonie
| | - Christophe Menkes
- ENTROPIE (UMR 9220), IRD, Université de la Réunion, CNRS, Ifremer, Université de Nouvelle Calédonie, Nouméa, Nouvelle-Calédonie
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Russell KL, Rupp RE, Morales-Ramirez JO, Diaz-Perez C, Andrews CP, Lee AW, Finn TS, Cox KS, Falk Russell A, Schaller MM, Martin JC, Hyatt DM, Gozlan-Kelner S, Bili A, Coller BAG. A phase I randomized, double-blind, placebo-controlled study to evaluate the safety, tolerability, and immunogenicity of a live-attenuated quadrivalent dengue vaccine in flavivirus-naïve and flavivirus-experienced healthy adults. Hum Vaccin Immunother 2022; 18:2046960. [PMID: 35290152 PMCID: PMC9225326 DOI: 10.1080/21645515.2022.2046960] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Dengue (DENV) is a mosquito-borne virus with four serotypes causing substantial morbidity in tropical and subtropical areas worldwide. V181 is an investigational, live, attenuated, quadrivalent dengue vaccine. In this phase 1 double-blind, placebo-controlled study, the safety, tolerability, and immunogenicity of V181 in baseline flavivirus-naïve (BFN) and flavivirus-experienced (BFE) healthy adults were evaluated in two formulations: TV003 and TV005. TV005 contains a 10-fold higher DENV2 level than TV003. Two-hundred adults were randomized 2:2:1 to receive TV003, TV005, or placebo on Days 1 and 180. Immunogenicity against the 4 DENV serotypes was measured using a Virus Reduction Neutralization Test (VRNT60) after each vaccination and out to 1 year after the second dose. There were no discontinuations due to adverse events (AE) or serious vaccine-related AEs in the study. Most common AEs after TV003 or TV005 were headache, rash, fatigue, and myalgia. Tri- or tetravalent vaccine-viremia was detected in 63.9% and 25.6% of BFN TV003 and TV005 participants, respectively, post-dose 1 (PD1). Tri- or tetravalent dengue VRNT60 seropositivity was demonstrated in 92.6% of BFN TV003, 74.2% of BFN TV005, and 100% of BFE TV003 and TV005 participants PD1. Increases in VRNT60 GMTs were observed after the first vaccination with TV003 and TV005 in both flavivirus subgroups for all dengue serotypes, and minimal increases were measured PD2. GMTs in the TV003 and TV005 BFE and BFN groups remained above the respective baselines and placebo through 1-year PD2. These data support further development of V181 as a single-dose vaccine for the prevention of dengue disease.
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Affiliation(s)
| | - Richard E Rupp
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX, USA
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40
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Pascoe L, Clemen T, Bradshaw K, Nyambo D. Review of Importance of Weather and Environmental Variables in Agent-Based Arbovirus Models. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15578. [PMID: 36497652 PMCID: PMC9740748 DOI: 10.3390/ijerph192315578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
The study sought to review the works of literature on agent-based modeling and the influence of climatic and environmental factors on disease outbreak, transmission, and surveillance. Thus, drawing the influence of environmental variables such as vegetation index, households, mosquito habitats, breeding sites, and climatic variables including precipitation or rainfall, temperature, wind speed, and relative humidity on dengue disease modeling using the agent-based model in an African context and globally was the aim of the study. A search strategy was developed and used to search for relevant articles from four databases, namely, PubMed, Scopus, Research4Life, and Google Scholar. Inclusion criteria were developed, and 20 articles met the criteria and have been included in the review. From the reviewed works of literature, the study observed that climatic and environmental factors may influence the arbovirus disease outbreak, transmission, and surveillance. Thus, there is a call for further research on the area. To benefit from arbovirus modeling, it is crucial to consider the influence of climatic and environmental factors, especially in Africa, where there are limited studies exploring this phenomenon.
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Affiliation(s)
- Luba Pascoe
- Nelson Mandela African Institution of Science and Technology, Arusha P.O Box 447, Tanzania
| | - Thomas Clemen
- Nelson Mandela African Institution of Science and Technology, Arusha P.O Box 447, Tanzania
- Department of Computer Science, Hamburg University of Applied Sciences, Berliner Tor 7, 20099 Hamburg, Germany
| | - Karen Bradshaw
- Nelson Mandela African Institution of Science and Technology, Arusha P.O Box 447, Tanzania
- Department of Computer Science, Rhodes University, Grahamstown 6139, South Africa
| | - Devotha Nyambo
- Nelson Mandela African Institution of Science and Technology, Arusha P.O Box 447, Tanzania
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Soh S, Ho SH, Seah A, Ong J, Richards DR, Gaw LYF, Dickens BS, Tan KW, Koo JR, Cook AR, Lim JT. Spatial Methods for Inferring Extremes in Dengue Outbreak Risk in Singapore. Viruses 2022; 14:v14112450. [PMID: 36366548 PMCID: PMC9695662 DOI: 10.3390/v14112450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/30/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022] Open
Abstract
Dengue is a major vector-borne disease worldwide. Here, we examined the spatial distribution of extreme weekly dengue outbreak risk in Singapore from 2007 to 2020. We divided Singapore into equal-sized hexagons with a circumradius of 165 m and obtained the weekly number of dengue cases and the surface characteristics of each hexagon. We accounted for spatial heterogeneity using max-stable processes. The 5-, 10-, 20-, and 30-year return levels, or the weekly dengue case counts expected to be exceeded once every 5, 10, 20, and 30 years, respectively, were determined for each hexagon conditional on their surface characteristics remaining constant over time. The return levels were higher in the country's east, with the maximum weekly dengue cases per hexagon expected to exceed 51 at least once in 30 years in many areas. The surface characteristics with the largest impact on outbreak risk were the age of public apartments and the percentage of impervious surfaces, where a 3-year and 10% increase in each characteristic resulted in a 3.8% and 3.3% increase in risk, respectively. Vector control efforts should be prioritized in older residential estates and places with large contiguous masses of built-up environments. Our findings indicate the likely scale of outbreaks in the long term.
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Affiliation(s)
- Stacy Soh
- Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
| | - Soon Hoe Ho
- Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
- Correspondence:
| | - Annabel Seah
- Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
| | - Janet Ong
- Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
| | | | - Leon Yan-Feng Gaw
- Department of Architecture, College of Design and Engineering, National University of Singapore, Singapore 117566, Singapore
| | - Borame Sue Dickens
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore 117549, Singapore
| | - Ken Wei Tan
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore 117549, Singapore
| | - Joel Ruihan Koo
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore 117549, Singapore
| | - Alex R. Cook
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore 117549, Singapore
| | - Jue Tao Lim
- Environmental Health Institute, National Environment Agency, Singapore 138667, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore 117549, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University Novena Campus, Singapore 639798, Singapore
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Dong B, Khan L, Smith M, Trevino J, Zhao B, Hamer GL, Lopez-Lemus UA, Molina AA, Lubinda J, Nguyen USDT, Haque U. Spatio-temporal dynamics of three diseases caused by Aedes-borne arboviruses in Mexico. COMMUNICATIONS MEDICINE 2022; 2:134. [PMID: 36317054 PMCID: PMC9616936 DOI: 10.1038/s43856-022-00192-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 09/20/2022] [Indexed: 11/07/2022] Open
Abstract
Background The intensity of transmission of Aedes-borne viruses is heterogeneous, and multiple factors can contribute to variation at small spatial scales. Illuminating drivers of heterogeneity in prevalence over time and space would provide information for public health authorities. The objective of this study is to detect the spatiotemporal clusters and determine the risk factors of three major Aedes-borne diseases, Chikungunya virus (CHIKV), Dengue virus (DENV), and Zika virus (ZIKV) clusters in Mexico. Methods We present an integrated analysis of Aedes-borne diseases (ABDs), the local climate, and the socio-demographic profiles of 2469 municipalities in Mexico. We used SaTScan to detect spatial clusters and utilize the Pearson correlation coefficient, Randomized Dependence Coefficient, and SHapley Additive exPlanations to analyze the influence of socio-demographic and climatic factors on the prevalence of ABDs. We also compare six machine learning techniques, including XGBoost, decision tree, Support Vector Machine with Radial Basis Function kernel, K nearest neighbors, random forest, and neural network to predict risk factors of ABDs clusters. Results DENV is the most prevalent of the three diseases throughout Mexico, with nearly 60.6% of the municipalities reported having DENV cases. For some spatiotemporal clusters, the influence of socio-economic attributes is larger than the influence of climate attributes for predicting the prevalence of ABDs. XGBoost performs the best in terms of precision-measure for ABDs prevalence. Conclusions Both socio-demographic and climatic factors influence ABDs transmission in different regions of Mexico. Future studies should build predictive models supporting early warning systems to anticipate the time and location of ABDs outbreaks and determine the stand-alone influence of individual risk factors and establish causal mechanisms.
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Affiliation(s)
- Bo Dong
- Department of Computer Science, University of Texas at Dallas, Richardson, TX 75080 USA
| | - Latifur Khan
- Department of Computer Science, University of Texas at Dallas, Richardson, TX 75080 USA
| | - Madison Smith
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX USA
| | - Jesus Trevino
- Department of Urban Affiars at the School of Architecture, Universidad Autónoma de Nuevo León, 66455 San Nicolás de los Garza, Nuevo Léon Mexico
| | - Bingxin Zhao
- Department of Statistics and Data Science, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Gabriel L Hamer
- Department of Entomology, Texas A&M University, College Station, TX USA
| | - Uriel A Lopez-Lemus
- Department of Health Sciences, Center for Biodefense and Global Infectious Diseases, Colima, 28078 Mexico
| | - Aracely Angulo Molina
- Department of Chemical and Biological Sciences, University of Sonora, Hermosillo 83000 Sonora, Mexico
| | - Jailos Lubinda
- Telethon Kids Institute, Malaria Atlas Project, Nedlands, WA Australia
| | - Uyen-Sa D T Nguyen
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX USA
| | - Ubydul Haque
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX USA
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Su W, Jiang L, Lu W, Xie H, Cao Y, Di B, Li Y, Nie K, Wang H, Zhang Z, Xu S. A Serotype-Specific and Multiplex PCR Method for Whole-Genome Sequencing of Dengue Virus Directly from Clinical Samples. Microbiol Spectr 2022; 10:e0121022. [PMID: 36094197 PMCID: PMC9602986 DOI: 10.1128/spectrum.01210-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 08/16/2022] [Indexed: 12/30/2022] Open
Abstract
Dengue virus (DENV) is the most globally prevalent member of the genus Flavivirus in the family Flaviviridae, which can be classified into four serotypes. Historically, molecular epidemiological studies of DENV depended on E gene sequencing. The development of next-generation sequencing (NGS) allowed its application to viral whole-genome sequencing (WGS). In this study, we report the improvement of the existing WGS process for DENV by optimizing the primer design procedure, designing serotype-specific primer panels and reducing the sizes of amplicons. A total of 31 DENV-positive serum samples belonging to 4 serotypes and 9 genotypes of DENV were involved in the validation of the primer panels. The threshold cycle (CT) values of these samples ranged from 23.91 to 35.11. The validation results showed that the length of consensus sequences generated at a coverage depth of 20× or more ranged from 10,370 to 10,672 bp, with 100.00% coverage of the open reading frames and 97.34% to 99.52% coverage of the DENV genome. The amplification efficiency varied across amplicons, genotypes, and serotypes of DENVs. These results indicate that the serotype-specific primer panels allow users to obtain the whole genome of DENV directly from clinical samples, providing a universal, rapid, and effective tool for the integration of genomics with dengue surveillance. IMPORTANCE Dengue virus (DENV) is becoming the most globally prevalent arbovirus. The number of people living under the threat of DENV is increasing year by year. With the development of next-generation sequencing (NGS) technology, whole-genome sequencing (WGS) has been more and more widely used in infectious disease surveillance and molecular epidemiological studies. DENV population sequencing by NGS can increase our understanding of the changing epidemiology and evolution of the DENV genome at the molecular level, which demands universal primer panels and combination with NGS platforms. Multiplex PCR with a short-amplicon approach proved superior for amplifying viral genomes from clinical samples, particularly when the viral RNA was present at low concentrations. Additionally, DENV are known for their genetic diversity within serotype groups and geographical regions, so the primer panels we designed focused on universality, which would be useful in future local DENV outbreaks.
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Affiliation(s)
- Wenzhe Su
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Liyun Jiang
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Weizhi Lu
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Huaping Xie
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Yimin Cao
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Biao Di
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Yan Li
- Shandong Center for Disease Control and Prevention, Jinan, China
| | - Kai Nie
- Department of Arboviruses, NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Beijing, China
- State Key Laboratory for Infectious Disease Control and Prevention, Beijing, China
| | - Huanyu Wang
- Department of Arboviruses, NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Beijing, China
- State Key Laboratory for Infectious Disease Control and Prevention, Beijing, China
| | - Zhoubin Zhang
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
- Institute of Public Health, Guangzhou Medical University & Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Songtao Xu
- Department of Arboviruses, NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Beijing, China
- State Key Laboratory for Infectious Disease Control and Prevention, Beijing, China
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Roster K, Connaughton C, Rodrigues FA. Machine-Learning-Based Forecasting of Dengue Fever in Brazilian Cities Using Epidemiologic and Meteorological Variables. Am J Epidemiol 2022; 191:1803-1812. [PMID: 35584963 DOI: 10.1093/aje/kwac090] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 03/15/2022] [Accepted: 05/10/2022] [Indexed: 01/29/2023] Open
Abstract
Dengue is a serious public health concern in Brazil and globally. In the absence of a universal vaccine or specific treatments, prevention relies on vector control and disease surveillance. Accurate and early forecasts can help reduce the spread of the disease. In this study, we developed a model for predicting monthly dengue cases in Brazilian cities 1 month ahead, using data from 2007-2019. We compared different machine learning algorithms and feature selection methods using epidemiologic and meteorological variables. We found that different models worked best in different cities, and a random forests model trained on monthly dengue cases performed best overall. It produced lower errors than a seasonal naive baseline model, gradient boosting regression, a feed-forward neural network, or support vector regression. For each city, we computed the mean absolute error between predictions and true monthly numbers of dengue cases on the test data set. The median error across all cities was 12.2 cases. This error was reduced to 11.9 when selecting the optimal combination of algorithm and input features for each city individually. Machine learning and especially decision tree ensemble models may contribute to dengue surveillance in Brazil, as they produce low out-of-sample prediction errors for a geographically diverse set of cities.
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Cruz-Arreola O, Orduña-Diaz A, Domínguez F, Reyes-Leyva J, Vallejo-Ruiz V, Domínguez-Ramírez L, Santos-López G. In silico testing of flavonoids as potential inhibitors of protease and helicase domains of dengue and Zika viruses. PeerJ 2022; 10:e13650. [PMID: 35945938 PMCID: PMC9357371 DOI: 10.7717/peerj.13650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 06/07/2022] [Indexed: 01/17/2023] Open
Abstract
Background Dengue and Zika are two major vector-borne diseases. Dengue causes up to 25,000 deaths and nearly a 100 million cases worldwide per year, while the incidence of Zika has increased in recent years. Although Zika has been associated to fetal microcephaly and Guillain-Barré syndrome both it and dengue have common clinical symptoms such as severe headache, retroocular pain, muscle and join pain, nausea, vomiting, and rash. Currently, vaccines have been designed and antivirals have been identified for these diseases but there still need for more options for treatment. Our group previously obtained some fractions from medicinal plants that blocked dengue virus (DENV) infection in vitro. In the present work, we explored the possible targets by molecular docking a group of molecules contained in the plant fractions against DENV and Zika virus (ZIKV) NS3-helicase (NS3-hel) and NS3-protease (NS3-pro) structures. Finally, the best ligands were evaluated by molecular dynamic simulations. Methods To establish if these molecules could act as wide spectrum inhibitors, we used structures from four DENV serotypes and from ZIKV. ADFR 1.2 rc1 software was used for docking analysis; subsequently molecular dynamics analysis was carried out using AMBER20. Results Docking suggested that 3,5-dicaffeoylquinic acid (DCA01), quercetin 3-rutinoside (QNR05) and quercetin 3,7-diglucoside (QND10) can tightly bind to both NS3-hel and NS3-pro. However, after a molecular dynamics analysis, tight binding was not maintained for NS3-hel. In contrast, NS3-pro from two dengue serotypes, DENV3 and DENV4, retained both QNR05 and QND10 which converged near the catalytic site. After the molecular dynamics analysis, both ligands presented a stable trajectory over time, in contrast to DCA01. These findings allowed us to work on the design of a molecule called MOD10, using the QND10 skeleton to improve the interaction in the active site of the NS3-pro domain, which was verified through molecular dynamics simulation, turning out to be better than QNR05 and QND10, both in interaction and in the trajectory. Discussion Our results suggests that NS3-hel RNA empty binding site is not a good target for drug design as the binding site located through docking is too big. However, our results indicate that QNR05 and QND10 could block NS3-pro activity in DENV and ZIKV. In the interaction with these molecules, the sub-pocket-2 remained unoccupied in NS3-pro, leaving opportunity for improvement and drug design using the quercetin scaffold. The analysis of the NS3-pro in complex with MOD10 show a molecule that exerts contact with sub-pockets S1, S1', S2 and S3, increasing its affinity and apparent stability on NS3-pro.
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Affiliation(s)
- Omar Cruz-Arreola
- Laboratorio de Biología Molecular y Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Atlixco, PUEBLA, México,Instrumentación Analítica y Biosensores, Centro de Investigación en Biotecnología Aplicada (CIBA), Instituto Politécnico Nacional, Tepetitla de Lardizábal, Tlaxcala, México
| | - Abdu Orduña-Diaz
- Instrumentación Analítica y Biosensores, Centro de Investigación en Biotecnología Aplicada (CIBA), Instituto Politécnico Nacional, Tepetitla de Lardizábal, Tlaxcala, México
| | - Fabiola Domínguez
- Laboratorio de Biotecnología de Productos Naturales, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Atlixco, Puebla, Mexico
| | - Julio Reyes-Leyva
- Laboratorio de Biología Molecular y Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Atlixco, PUEBLA, México
| | - Verónica Vallejo-Ruiz
- Laboratorio de Biología Molecular y Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Atlixco, PUEBLA, México
| | - Lenin Domínguez-Ramírez
- Department of Chemical and Biological Sciences, School of Sciences, Universidad de las Américas Puebla, San Andrés Cholula, Puebla, Mexico
| | - Gerardo Santos-López
- Laboratorio de Biología Molecular y Virología, Centro de Investigación Biomédica de Oriente, Instituto Mexicano del Seguro Social, Metepec, Atlixco, PUEBLA, México
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Linear and Machine Learning modelling for spatiotemporal disease predictions: Force-of-Infection of Chagas disease. PLoS Negl Trop Dis 2022; 16:e0010594. [PMID: 35853042 PMCID: PMC9337653 DOI: 10.1371/journal.pntd.0010594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 07/29/2022] [Accepted: 06/18/2022] [Indexed: 12/02/2022] Open
Abstract
Background Chagas disease is a long-lasting disease with a prolonged asymptomatic period. Cumulative indices of infection such as prevalence do not shed light on the current epidemiological situation, as they integrate infection over long periods. Instead, metrics such as the Force-of-Infection (FoI) provide information about the rate at which susceptible people become infected and permit sharper inference about temporal changes in infection rates. FoI is estimated by fitting (catalytic) models to available age-stratified serological (ground-truth) data. Predictive FoI modelling frameworks are then used to understand spatial and temporal trends indicative of heterogeneity in transmission and changes effected by control interventions. Ideally, these frameworks should be able to propagate uncertainty and handle spatiotemporal issues. Methodology/principal findings We compare three methods in their ability to propagate uncertainty and provide reliable estimates of FoI for Chagas disease in Colombia as a case study: two Machine Learning (ML) methods (Boosted Regression Trees (BRT) and Random Forest (RF)), and a Linear Model (LM) framework that we had developed previously. Our analyses show consistent results between the three modelling methods under scrutiny. The predictors (explanatory variables) selected, as well as the location of the most uncertain FoI values, were coherent across frameworks. RF was faster than BRT and LM, and provided estimates with fewer extreme values when extrapolating to areas where no ground-truth data were available. However, BRT and RF were less efficient at propagating uncertainty. Conclusions/significance The choice of FoI predictive models will depend on the objectives of the analysis. ML methods will help characterise the mean behaviour of the estimates, while LM will provide insight into the uncertainty surrounding such estimates. Our approach can be extended to the modelling of FoI patterns in other Chagas disease-endemic countries and to other infectious diseases for which serosurveys are regularly conducted for surveillance. Metrics such as the per susceptible rate of infection acquisition (Force-of-Infection) are crucial to understand the current epidemiological situation and the impact of control interventions for long-lasting diseases in which the infection event might have occurred many years previously, such as Chagas disease. FoI values are estimated from serological age profiles, often obtained in a few locations. However, when using predictive models to estimate the FoI over time and space (including areas where serosurveys had not been conducted), methods able to handle and propagate uncertainty must be implemented; otherwise, overconfident predictions may be obtained. Although Machine Learning (ML) methods are powerful tools, they may not be able to entirely handle this challenge. Therefore, the use of ML must be considered in relation to the aims of the analyses. ML will be more relevant to characterise the central trends of the estimates while Linear Models will help identify areas where further serosurveys should be conducted to improve the reliability of the predictions. Our approaches can be used to generate FoI predictions in other Chagas disease-endemic countries as well as in other diseases for which serological surveillance data are collected.
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Cox V, O’Driscoll M, Imai N, Prayitno A, Hadinegoro SR, Taurel AF, Coudeville L, Dorigatti I. Estimating dengue transmission intensity from serological data: A comparative analysis using mixture and catalytic models. PLoS Negl Trop Dis 2022; 16:e0010592. [PMID: 35816508 PMCID: PMC9302823 DOI: 10.1371/journal.pntd.0010592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 07/21/2022] [Accepted: 06/16/2022] [Indexed: 11/18/2022] Open
Abstract
Background Dengue virus (DENV) infection is a global health concern of increasing magnitude. To target intervention strategies, accurate estimates of the force of infection (FOI) are necessary. Catalytic models have been widely used to estimate DENV FOI and rely on a binary classification of serostatus as seropositive or seronegative, according to pre-defined antibody thresholds. Previous work has demonstrated the use of thresholds can cause serostatus misclassification and biased estimates. In contrast, mixture models do not rely on thresholds and use the full distribution of antibody titres. To date, there has been limited application of mixture models to estimate DENV FOI. Methods We compare the application of mixture models and time-constant and time-varying catalytic models to simulated data and to serological data collected in Vietnam from 2004 to 2009 (N ≥ 2178) and Indonesia in 2014 (N = 3194). Results The simulation study showed larger mean FOI estimate bias from the time-constant and time-varying catalytic models (-0.007 (95% Confidence Interval (CI): -0.069, 0.029) and -0.006 (95% CI -0.095, 0.043)) than from the mixture model (0.001 (95% CI -0.036, 0.065)). Coverage of the true FOI was > 95% for estimates from both the time-varying catalytic and mixture model, however the latter had reduced uncertainty. When applied to real data from Vietnam, the mixture model frequently produced higher FOI and seroprevalence estimates than the catalytic models. Conclusions Our results suggest mixture models represent valid, potentially less biased, alternatives to catalytic models, which could be particularly useful when estimating FOI from data with largely overlapping antibody titre distributions. Characterising the transmission intensity of dengue virus is essential to inform the implementation of interventions, such as vector control and vaccination, and to better understand the environmental drivers of transmission locally and globally. It is therefore important to understand how methodological differences and model choice may influence the accuracy of estimates of transmission intensity. Using a simulation study, we assessed the performance of catalytic and mixture models to reconstruct the force of infection (FOI) from simulated antibody titre data. Furthermore, we estimated the FOI of dengue virus from antibody titre data collected in Vietnam and Indonesia. The models produced consistent estimates of FOI when they were applied to data with clear separation between the distributions of seronegative and seropositive antibody titres. We observed greater bias in FOI estimates obtained from catalytic models than from mixture models when they were applied to data with high overlap in the bimodal distribution of antibody titres. Our results indicate that mixture models could be preferential to estimate dengue virus FOI when the antibody titre distributions of the seronegative and seropositive components largely overlap.
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Affiliation(s)
- Victoria Cox
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics, School of Public Health, Imperial College London, London, United Kingdom
- * E-mail:
| | - Megan O’Driscoll
- Department of Genetics, University of Cambridge, Cambridge, United Kingdom
| | - Natsuko Imai
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics, School of Public Health, Imperial College London, London, United Kingdom
| | - Ari Prayitno
- Department of Child Health, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | - Sri Rezeki Hadinegoro
- Department of Child Health, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
| | | | | | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis; and the Abdul Latif Jameel Institute for Disease and Emergency Analytics, School of Public Health, Imperial College London, London, United Kingdom
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Gounassegarane D, Gunalan A, Jamir I, Sharmila FM, Barathidasan R, Raj RV, Dhodapkar R. Potential impact of SARS COV-2 infection on the performance of serological assays used to diagnose arboviral diseases. J Immunol Methods 2022; 508:113312. [PMID: 35798263 PMCID: PMC9251896 DOI: 10.1016/j.jim.2022.113312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 11/11/2022]
Abstract
Background The COVID-19 pandemic caused by SARS-CoV-2 was first described in December 2019, in China. In addition, there has also been an increase in arboviral infections in recent years. As both infections have similar symptoms, misdiagnosis may occur if both outbreaks occur at the same time. Objective Our objective was to assess the potential impact of SARS-CoV-2 infection on diagnostic assays used for arboviral diseases. Materials and methods We conducted this study by testing samples obtained during the precovid phase (before November 2019) and during the covid period (after February 2020). Samples were further grouped as those with acute febrile illness (AFI) and those without. All samples were tested for anti SARS-CoV-2 Ab, Chikungunya and Dengue specific IgM antibodies to evaluate potential serological cross-reactions between COVID-19 and Arbovirus specific antibodies. Results One sample from the 62 cases of AFI during the pre-covid phase showed seropositivity for SARS-CoV-2 antibodies. Also, in asymptomatic individuals, arboviral seropositivity was significantly higher in the COVID period samples (22%) compared to pre-COVID samples (3%). Conclusion Due to similar clinical symptoms and cross reactions in both infections, relying solely on serological testing for arboviral diagnosis may be less sensitive; other clinical and laboratory parameters may be required.
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Dias AG, Atyeo C, Loos C, Montoya M, Roy V, Bos S, Narvekar P, Singh T, Katzelnick LC, Kuan G, Lauffenburger DA, Balmaseda A, Alter G, Harris E. Antibody Fc characteristics and effector functions correlate with protection from symptomatic dengue virus type 3 infection. Sci Transl Med 2022; 14:eabm3151. [PMID: 35767652 PMCID: PMC10115655 DOI: 10.1126/scitranslmed.abm3151] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Preexisting cross-reactive antibodies have been implicated in both protection and pathogenesis during subsequent infections with different dengue virus (DENV) serotypes (DENV1-4). Nonetheless, humoral immune correlates and mechanisms of protection have remained elusive. Using a systems serology approach to evaluate humoral responses, we profiled plasma collected before inapparent or symptomatic secondary DENV3 infection from our pediatric cohort in Nicaragua. Children protected from symptomatic infections had more anti-envelope (E) and anti-nonstructural protein 1 (NS1) total immunoglobulin G (IgG), IgG4, and greater Fc effector functions than those with symptoms. Fc effector functions were also associated with protection from hemorrhagic manifestations in the pre-symptomatic group. Furthermore, in vitro virological assays using these plasma samples revealed that protection mediated by antibody-dependent complement deposition was associated with both lysis of virions and DENV-infected cells. These data suggest that E- and NS1-specific Fc functions may serve as correlates of protection, which can be potentially applied toward the design and evaluation of dengue vaccines.
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Affiliation(s)
- Antonio G. Dias
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | - Caroline Atyeo
- Ragon Institute of MGH, MIT, and Harvard; Cambridge, MA, USA
| | - Carolin Loos
- Ragon Institute of MGH, MIT, and Harvard; Cambridge, MA, USA
- Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Magelda Montoya
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | - Vicky Roy
- Ragon Institute of MGH, MIT, and Harvard; Cambridge, MA, USA
| | - Sandra Bos
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | - Parnal Narvekar
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | - Tulika Singh
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
| | - Leah C. Katzelnick
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
- Viral Epidemiology and Immunity Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Guillermina Kuan
- Sustainable Sciences Institute, Managua, Nicaragua
- Centro de Salud Sócrates Flores Vivas, Ministerio de Salud, Managua, Nicaragua
| | | | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
| | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard; Cambridge, MA, USA
| | - Eva Harris
- Division of Infectious Disease and Vaccinology, School of Public Health, University of California, Berkeley; Berkeley, CA, USA
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Estimating the Time Reproduction Number in Kupang City Indonesia, 2016–2020, and Assessing the Effects of Vaccination and Different Wolbachia Strains on Dengue Transmission Dynamics. MATHEMATICS 2022. [DOI: 10.3390/math10122075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The use of a vaccine and Wolbachia bacterium have been proposed as new strategies against dengue. However, the performance of Wolbachia in reducing dengue incidence may depend on the Wolbachia strains. Therefore, in this paper, the performance of two Wolbachia strains which are WMel and WAu, in combination with the vaccine, has been assessed by using an age-dependent mathematical model. An effective reproduction number has been calculated using the Extended Kalman Filter (EKF) algorithm. The results revealed that the time reproduction number varies overtime with the highest one being around 2.75. Moreover, it has also found that use of the vaccine and Wolbachia possibly leads to dengue elimination. Furthermore, vaccination on one group only reduces dengue incidence in that group but dengue infection in the other group is still high. Furthermore, the performance of the WAu strain is better than the WMel strain in reducing dengue incidence. However, both strains can still be used for dengue elimination strategies depending on the level of loss of Wolbachia infections in both strains.
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