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Sebastianelli A, Spiller D, Carmo R, Wheeler J, Nowakowski A, Jacobson LV, Kim D, Barlevi H, Cordero ZER, Colón-González FJ, Lowe R, Ullo SL, Schneider R. A reproducible ensemble machine learning approach to forecast dengue outbreaks. Sci Rep 2024; 14:3807. [PMID: 38360915 PMCID: PMC10869339 DOI: 10.1038/s41598-024-52796-9] [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: 09/15/2023] [Accepted: 01/23/2024] [Indexed: 02/17/2024] Open
Abstract
Dengue fever, a prevalent and rapidly spreading arboviral disease, poses substantial public health and economic challenges in tropical and sub-tropical regions worldwide. Predicting infectious disease outbreaks on a countrywide scale is complex due to spatiotemporal variations in dengue incidence across administrative areas. To address this, we propose a machine learning ensemble model for forecasting the dengue incidence rate (DIR) in Brazil, with a focus on the population under 19 years old. The model integrates spatial and temporal information, providing one-month-ahead DIR estimates at the state level. Comparative analyses with a dummy model and ablation studies demonstrate the ensemble model's qualitative and quantitative efficacy across the 27 Brazilian Federal Units. Furthermore, we showcase the transferability of this approach to Peru, another Latin American country with differing epidemiological characteristics. This timely forecast system can aid local governments in implementing targeted control measures. The study advances climate services for health by identifying factors triggering dengue outbreaks in Brazil and Peru, emphasizing collaborative efforts with intergovernmental organizations and public health institutions. The innovation lies not only in the algorithms themselves but in their application to a domain marked by data scarcity and operational scalability challenges. We bridge the gap by integrating well-curated ground data with advanced analytical methods, addressing a significant deficiency in current practices. The successful transfer of the model to Peru and its consistent performance during the 2019 outbreak in Brazil showcase its scalability and practical application. While acknowledging limitations in handling extreme values, especially in regions with low DIR, our approach excels where accurate predictions are critical. The study not only contributes to advancing DIR forecasting but also represents a paradigm shift in integrating advanced analytics into public health operational frameworks. This work, driven by a collaborative spirit involving intergovernmental organizations and public health institutions, sets a precedent for interdisciplinary collaboration in addressing global health challenges. It not only enhances our understanding of factors triggering dengue outbreaks but also serves as a template for the effective implementation of advanced analytical methods in public health.
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Affiliation(s)
- Alessandro Sebastianelli
- Engineering Department, University of Sannio, Benevento, Italy.
- European Space Agency, Φ-lab, Frascati, Italy.
| | - Dario Spiller
- School of Aerospace Engineering, Sapienza University of Rome, Rome, Italy
| | | | | | - Artur Nowakowski
- Faculty of Geodesy and Cartography, Warsaw University of Technology, Warsaw, Poland
| | | | | | | | | | - Felipe J Colón-González
- Wellcome Trust, Data for Science and Health, London, UK
- Centre on Climate Change and Planetary Health and Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, UK
- Tyndall Centre for Climate Change Research, School of Environmental Sciences, University of East Anglia, Norwich, UK
| | - Rachel Lowe
- Centre on Climate Change and Planetary Health and Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, UK
- Barcelona Supercomputing Center (BSC), Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
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Roelofs B, Vos D, Halabi Y, Gerstenbluth I, Duits A, Grillet ME, Tami A, Vincenti-Gonzalez MF. Spatial and temporal trends of dengue infections in Curaçao: A 21-year analysis. Parasite Epidemiol Control 2024; 24:e00338. [PMID: 38323192 PMCID: PMC10844965 DOI: 10.1016/j.parepi.2024.e00338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 12/22/2023] [Accepted: 01/23/2024] [Indexed: 02/08/2024] Open
Abstract
Dengue viruses are a significant global health concern, causing millions of infections annually and putting approximately half of the world's population at risk, as reported by the World Health Organization (WHO). Understanding the spatial and temporal patterns of dengue virus spread is crucial for effective prevention of future outbreaks. By investigating these patterns, targeted dengue surveillance and control measures can be improved, aiding in the management of outbreaks in dengue-affected regions. Curaçao, where dengue is endemic, has experienced frequent outbreaks over the past 25 years. To examine the spatial and temporal trends of dengue outbreaks in Curaçao, this study employs an interdisciplinary and multi-method approach. Data on >6500 cases of dengue infections in Curaçao between the years 1995 and 2016 were used. Temporal and spatial statistics were applied. The Moran's I index identified the presence of spatial autocorrelation for incident locations, allowing us to reject the null hypothesis of spatial randomness. The majority of cases were recorded in highly populated areas and a relationship was observed between population density and dengue cases. Temporal analysis demonstrated that cases mostly occurred from October to January, during the rainy season. Lower average temperatures, higher precipitation and a lower sea surface temperature appear to be related to an increase in dengue cases. This effect has a direct link to La Niña episodes, which is the cooling phase of El Niño Southern Oscillation. The spatial and temporal analyses conducted in this study are fundamental to understanding the timing and locations of outbreaks, and ultimately improving dengue outbreak management.
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Affiliation(s)
- Bart Roelofs
- University of Groningen, Faculty of Spatial Sciences, Groningen, the Netherlands
| | - Daniella Vos
- University of Groningen, Faculty of Spatial Sciences, Groningen, the Netherlands
| | | | | | - Ashley Duits
- Red Cross Blood Bank Foundation Curaçao, Curaçao
| | - Maria E. Grillet
- Laboratorio de Biología de Vectores y Parásitos, Instituto de Zoología y Ecología Tropical, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
| | - Adriana Tami
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Maria F. Vincenti-Gonzalez
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
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de Arruda TB, Bavia L, Mosimann ALP, Aoki MN, Sarzi ML, Conchon-Costa I, Wowk PF, Duarte dos Santos CN, Pavanelli WR, Silveira GF, Bordignon J. Viremia and Inflammatory Cytokines in Dengue: Interleukin-2 as a Biomarker of Infection, and Interferon-α and -γ as Markers of Primary versus Secondary Infection. Pathogens 2023; 12:1362. [PMID: 38003826 PMCID: PMC10675515 DOI: 10.3390/pathogens12111362] [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: 08/31/2023] [Revised: 10/26/2023] [Accepted: 11/01/2023] [Indexed: 11/26/2023] Open
Abstract
The pathogenesis of Dengue virus (DENV) infection is complex and involves viral replication that may trigger an inflammatory response leading to severe disease. Here, we investigated the correlation between viremia and cytokine levels in the serum of DENV-infected patients. Between 2013 and 2014, 138 patients with a diagnosis of acute-phase DENV infection and 22 patients with a non-dengue acute febrile illness (AFI) were enrolled. Through a focus-forming assay (FFU), we determined the viremia levels in DENV-infected patients and observed a peak in the first two days after the onset of symptoms. A higher level of viremia was observed in primary versus secondary DENV-infected patients. Furthermore, no correlation was observed between viremia and inflammatory cytokine levels in DENV-infected patients. Receiver operating characteristic (ROC) curve analysis revealed that IL-2 has the potential to act as a marker to distinguish dengue from other febrile illnesses and is positively correlated with Th1 cytokines. IFN-α and IFN-γ appear to be potential markers of primary versus secondary infection in DENV-infected patients, respectively. The results also indicate that viremia levels are not the main driving force behind inflammation in dengue and that cytokines could be used as infection biomarkers and for differentiation between primary versus secondary infection.
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Affiliation(s)
- Thaís Bonato de Arruda
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
| | - Lorena Bavia
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
- Departamento de Biologia Celular, Setor de Ciências Biológicas, Universidade Federal do Paraná (UFPR), Curitiba 81531-980, Paraná, Brazil
| | - Ana Luiza Pamplona Mosimann
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
| | - Mateus Nobrega Aoki
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
- Laboratório de Ciências & Tecnologias Aplicadas a Saúde, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil
| | - Maria Lo Sarzi
- Secretaria Municipal de Saúde de Cambé, Cambé 86057-970, Paraná, Brazil
| | - Ivete Conchon-Costa
- Laboratório de Protozoologia Experimental, Universidade Estadual de Londrina, Londrina 86057-970, Paraná, Brazil (W.R.P.)
| | - Pryscilla Fanini Wowk
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
| | - Claudia Nunes Duarte dos Santos
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
| | - Wander Rogério Pavanelli
- Laboratório de Protozoologia Experimental, Universidade Estadual de Londrina, Londrina 86057-970, Paraná, Brazil (W.R.P.)
| | | | - Juliano Bordignon
- Laboratório de Virologia Molecular, Instituto Carlos Chagas, Fiocruz, Curitiba 81350-010, Paraná, Brazil; (T.B.d.A.); (A.L.P.M.)
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Seposo X, Valenzuela S, Apostol GL. Socio-economic factors and its influence on the association between temperature and dengue incidence in 61 Provinces of the Philippines, 2010-2019. PLoS Negl Trop Dis 2023; 17:e0011700. [PMID: 37871125 PMCID: PMC10621993 DOI: 10.1371/journal.pntd.0011700] [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: 04/14/2023] [Revised: 11/02/2023] [Accepted: 10/04/2023] [Indexed: 10/25/2023] Open
Abstract
BACKGROUND Temperature has a significant impact on dengue incidence, however, changes on the temperature-dengue relationship across axes of socio-economic vulnerability is not well described. This study sought to determine the association between dengue and temperature in multiple locations in the Philippines and explore the effect modification by socio-economic factors. METHOD Nationwide dengue cases per province from 2010 to 2019 and data on temperature were obtained from the Philippines' Department of Health-Epidemiological Bureau and ERA5-land, respectively. A generalized additive mixed model (GAMM) with a distributed lag non-linear model was utilized to examine the association between temperature and dengue incidence. We further implemented an interaction analysis in determining how socio-economic factors modify the association. All analyses were implemented using R programming. RESULTS Nationwide temperature-dengue risk function was noted to depict an inverted U-shaped pattern. Dengue risk increased linearly alongside increasing mean temperature from 15.8 degrees Celsius and peaking at 27.5 degrees Celsius before declining. However, province-specific analyses revealed significant heterogeneity. Socio-economic factors had varying impact on the temperature-dengue association. Provinces with high population density, less people in urban areas with larger household size, high poverty incidence, higher health spending per capita, and in lower latitudes were noted to exhibit statistically higher dengue risk compared to their counterparts at the upper temperature range. CONCLUSIONS This observational study found that temperature was associated with dengue incidence, and that this association is more apparent in locations with high population density, less people in urban areas with larger household size, high poverty incidence, higher health spending per capita, and in lower latitudes. Differences with socio-economic conditions is linked with dengue risk. This highlights the need to develop interventions tailor-fit to local conditions.
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Affiliation(s)
- Xerxes Seposo
- Department of Hygiene, Hokkaido University, Sapporo, Hokkaido Japan
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
- Ateneo School of Medicine and Public Health, Ateneo de Manila University, Pasig, Philippines
| | - Sary Valenzuela
- Ateneo School of Medicine and Public Health, Ateneo de Manila University, Pasig, Philippines
| | - Geminn Louis Apostol
- Ateneo School of Medicine and Public Health, Ateneo de Manila University, Pasig, Philippines
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Coronel-Ruiz C, Velandia-Romero ML, Calvo E, Camacho-Ortega S, Parra-Alvarez S, Beltrán EO, Calderón-Pelaez MA, Porras-Ramírez A, Cortés-Muñoz F, Rojas-Hernandez JP, Velasco-Alvarez S, Pinzón-Junca A, Castellanos JE. Improving dengue diagnosis and case confirmation in children by combining rapid diagnostic tests, clinical, and laboratory variables. FRONTIERS IN TROPICAL DISEASES 2023. [DOI: 10.3389/fitd.2023.1118774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
Abstract
BackgroundDengue is the most widely distributed arboviral disease in tropical and subtropical countries. Most suspected cases are diagnosed according to the clinical criteria, and early diagnosis is difficult. Moreover, in underdeveloped countries, several factors continue to challenge the diagnosis and surveillance of dengue cases. This study aimed to design a diagnostic algorithm using rapid diagnostic tests (RDTs), ELISA tests, and clinical and hematological variables to confirm dengue cases in febrile patients in Colombia.MethodsAltogether, 505 samples were collected. Serum samples were evaluated by RDTs (IgM and IgG antibodies and NS1 antigen), capture IgM and IgG ELISAs, and endpoint hemi-nested RT-PCR assay (qualitative). We statistically analyzed the performance of individual tests to determine the most useful ones to confirm dengue cases accurately.ResultsIndividual results for IgM, IgG, and NS1 RDTs yielded lower sensitivity and specificity values than the reference standard. High sensitivity and specificity were obtained after combining IgM and NS1 ELISA results (96.3% and 96.4%) and NS1 RDT plus IgM ELISA results (90.3% and 96.2%), respectively. Adjusted odds ratios (aORs) were calculated for clinical variables and laboratory tests to differentiate dengue from other febrile illnesses (OFI). This approach showed that myalgia, abdominal tenderness, and platelet count were identified with higher sensitivity to confirm dengue cases. IgM RDT and NS1 RDT differentiated dengue cases from OFI. A positive IgM RDT or a positive NS1 RDT combined with specific signs or symptoms confirmed 81.6% of dengue cases. A combination of clinical findings and a positive NS1 RDT or positive ELISA IgM confirmed 90.6% of the cases.ConclusionOur findings showed that clinical diagnoses in pediatric population alone cannot confirm true dengue cases and needs to be complemented by laboratory diagnostic tests. We also demonstrate the usefulness of combining clinical criteria with RDTs, suggesting that their implementation with the IgM ELISA test improves dengue case confirmation.
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Ribeiro Dos Santos G, Durovni B, Saraceni V, Souza Riback TI, Pinto SB, Anders KL, Moreira LA, Salje H. Estimating the effect of the wMel release programme on the incidence of dengue and chikungunya in Rio de Janeiro, Brazil: a spatiotemporal modelling study. THE LANCET. INFECTIOUS DISEASES 2022; 22:1587-1595. [PMID: 36182679 PMCID: PMC9630156 DOI: 10.1016/s1473-3099(22)00436-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 05/14/2023]
Abstract
BACKGROUND Introgression of genetic material from species of the insect bacteria Wolbachia into populations of Aedes aegypti mosquitoes has been shown in randomised and non-randomised trials to reduce the incidence of dengue; however, evidence for the real-world effectiveness of large-scale deployments of Wolbachia-infected mosquitoes for arboviral disease control in endemic settings is still scarce. A large Wolbachia (wMel strain) release programme was implemented in 2017 in Rio de Janeiro, Brazil. We aimed to assess the effect of this programme on the incidence of dengue and chikungunya in the city. METHODS 67 million wMel-infected mosquitoes were released across 28 489 locations over an area of 86·8 km2 in Rio de Janeiro between Aug 29, 2017 and Dec 27, 2019. Following releases, mosquitoes were trapped and the presence of wMel was recorded. In this spatiotemporal modelling study, we assessed the effect of the release programme on the incidence of dengue and chikungunya. We used spatiotemporally explicit mathematical models applied to geocoded dengue cases (N=283 270) from 2010 to 2019 and chikungunya cases (N=57 705) from 2016 to 2019. FINDINGS On average, 32% of mosquitoes collected from the release zones between 1 month and 29 months after the initial release tested positive for wMel. Reduced wMel introgression occurred in locations and seasonal periods in which cases of dengue and chikungunya were historically high, with a decrease to 25% of mosquitoes testing positive for wMel during months in which disease incidence was at its highest. Despite incomplete introgression, we found that the releases were associated with a 38% (95% CI 32-44) reduction in the incidence of dengue and a 10% (4-16) reduction in the incidence of chikungunya. INTERPRETATION Stable establishment of wMel in the geographically diverse, urban setting of Rio de Janeiro seems to be more complicated than has been observed elsewhere. However, even intermediate levels of wMel seem to reduce the incidence of disease caused by two arboviruses. These findings will help to guide future release programmes. FUNDING Bill & Melinda Gates Foundation and the European Research Council.
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Affiliation(s)
| | - Betina Durovni
- Centre for Strategic Studies, Fiocruz, Rio de Janeiro, Brazil; World Mosquito Program, Fiocruz, Rio de Janeiro, Brazil
| | | | | | - Sofia B Pinto
- World Mosquito Program, Fiocruz, Rio de Janeiro, Brazil
| | - Katherine L Anders
- World Mosquito Program, Institute of Vector-Borne Disease, Monash University, Melbourne, VIC, Australia
| | - Luciano A Moreira
- World Mosquito Program, Fiocruz, Rio de Janeiro, Brazil; Instituto Rene Rachou, Fiocruz, Belo Horizonte, Brazil
| | - Henrik Salje
- Pathogen Dynamics Group, Department of Genetics, University of Cambridge, Cambridge, UK.
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Bonilla-Aldana DK, Gutiérrez-Grajales EJ, Martínez-Arboleda JP, Reina-Mora MA, Trejos-Mendoza AE, Pérez-Vargas S, Valencia-Mejía L, Marín-Arboleda LF, Osorio-Navia D, Chacón-Peña M, González-Colonia LV, Cardona-Ospina JA, Jiménez-Posada EV, Diaz A, Salazar JC, Sierra M, Muñoz-Lara F, Zambrano LI, Ramírez-Vallejo E, Álvarez JC, Jaramillo-Delgado IL, Pecho-Silva S, Paniz-Mondolfi A, Faccini-Martínez ÁA, Rodríguez-Morales AJ. Seroprevalence canine survey for selected vector-borne pathogens of and its relationship with poverty in metropolitan Pereira, Colombia, 2020. Parasite Epidemiol Control 2022; 17:e00249. [PMID: 35493769 PMCID: PMC9048108 DOI: 10.1016/j.parepi.2022.e00249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/01/2022] [Accepted: 03/29/2022] [Indexed: 11/19/2022] Open
Affiliation(s)
- D. Katterine Bonilla-Aldana
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
- Red Colombiana de Enfermedades Transmitidas por Garrapatas en Pequeños Animales (RECEPA) – Colombian Network of Tick-Borne Diseases in Small Animals (RECEPA), Pereira, Risaralda, Colombia
- Committee of Tropical Medicine, Zoonoses and Travel Medicine, Asociación Colombiana de Infectología, Bogotá, Colombia
| | - Erwin J. Gutiérrez-Grajales
- Red Colombiana de Enfermedades Transmitidas por Garrapatas en Pequeños Animales (RECEPA) – Colombian Network of Tick-Borne Diseases in Small Animals (RECEPA), Pereira, Risaralda, Colombia
| | - J. Paola Martínez-Arboleda
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - María Angelica Reina-Mora
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Adrián E. Trejos-Mendoza
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Soffia Pérez-Vargas
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Lorenzo Valencia-Mejía
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Luisa F. Marín-Arboleda
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Daniela Osorio-Navia
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | - Mariana Chacón-Peña
- Semillero de Investigación en Zoonosis (SIZOO), Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
| | | | - Jaime A. Cardona-Ospina
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
- Grupo de Investigación Biomedicina, Faculty of Medicine, Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Grupo de Investigación en Infecciones Emergentes y Medicina Tropical, Instituto para la Investigación en Ciencias Biomédicas, SCI-HELP, Pereira, Risaralda, Colombia
- Committee of Tropical Medicine, Zoonoses and Travel Medicine, Asociación Colombiana de Infectología, Bogotá, Colombia
| | - Erika Vanessa Jiménez-Posada
- Grupo de Investigación en Infecciones Emergentes y Medicina Tropical, Instituto para la Investigación en Ciencias Biomédicas, SCI-HELP, Pereira, Risaralda, Colombia
| | | | | | - Manuel Sierra
- Unit of Scientific Research, School of Medical, Faculty of Medical Sciences, Universidad Nacional Autónoma de Honduras (UNAH), Tegucigalpa, Honduras
| | - Fausto Muñoz-Lara
- Department of Internal Medicine, Faculty of Medical Sciences, Universidad Nacional Autónoma de Honduras (UNAH), Tegucigalpa, Honduras
- Department of Internal Medicine, Hospital Escuela, Tegucigalpa, Honduras
| | - Lysien I. Zambrano
- Unit of Scientific Research, School of Medical, Faculty of Medical Sciences, Universidad Nacional Autónoma de Honduras (UNAH), Tegucigalpa, Honduras
| | | | - Juan Camilo Álvarez
- Grupo de Investigación One-Health, Departamento de Investigación de Enfermedades Infecciosas en Animales, Centro de Diagnóstico Especializado Testmol, Medellín, Antioquia, Colombia
| | - Ingrid Lorena Jaramillo-Delgado
- Red Colombiana de Enfermedades Transmitidas por Garrapatas en Pequeños Animales (RECEPA) – Colombian Network of Tick-Borne Diseases in Small Animals (RECEPA), Pereira, Risaralda, Colombia
- Grupo de Investigación One-Health, Departamento de Investigación de Enfermedades Infecciosas en Animales, Centro de Diagnóstico Especializado Testmol, Medellín, Antioquia, Colombia
| | - Samuel Pecho-Silva
- Universidad Cientifica del Sur, Lima, Peru
- Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru
| | - Alberto Paniz-Mondolfi
- Laboratory of Medical Microbiology, Department of Pathology, Molecular and Cell-based Medicine, The Mount Sinai Hospital-Icahn School of Medicine at Mount Sinai, New York, USA
| | - Álvaro A. Faccini-Martínez
- Red Colombiana de Enfermedades Transmitidas por Garrapatas en Pequeños Animales (RECEPA) – Colombian Network of Tick-Borne Diseases in Small Animals (RECEPA), Pereira, Risaralda, Colombia
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
- Committee of Tropical Medicine, Zoonoses and Travel Medicine, Asociación Colombiana de Infectología, Bogotá, Colombia
| | - Alfonso J. Rodríguez-Morales
- Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia
- Red Colombiana de Enfermedades Transmitidas por Garrapatas en Pequeños Animales (RECEPA) – Colombian Network of Tick-Borne Diseases in Small Animals (RECEPA), Pereira, Risaralda, Colombia
- Grupo de Investigación Biomedicina, Faculty of Medicine, Fundación Universitaria Autónoma de las Américas, Pereira, Risaralda, Colombia
- Grupo de Investigación en Infecciones Emergentes y Medicina Tropical, Instituto para la Investigación en Ciencias Biomédicas, SCI-HELP, Pereira, Risaralda, Colombia
- Universidad Cientifica del Sur, Lima, Peru
- Committee of Tropical Medicine, Zoonoses and Travel Medicine, Asociación Colombiana de Infectología, Bogotá, Colombia
- Corresponding author at: Institución Universitaria Visión de las Américas, Pereira, Risaralda, Colombia.
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Gleeson T, Pagnarith Y, Habsreng E, Lindsay R, Hill M, Sanseverino A, Patel V, Gaspari R. Dengue Management in Triage using Ultrasound in children from Cambodia: a prospective cohort study. THE LANCET REGIONAL HEALTH. WESTERN PACIFIC 2022; 19:100371. [PMID: 35079724 PMCID: PMC8777139 DOI: 10.1016/j.lanwpc.2021.100371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Dengue is a mosquito-borne viral infection with increasing global prevalence. It is endemic in more than 100 countries, with a heavy burden in Asia. Ultrasound findings including gallbladder wall thickening, ascites, and pleural effusions secondary to plasma leakage have been described in dengue. We aimed to determine if the presence of point-of-care ultrasound findings early in suspected dengue could predict clinical worsening in ambulatory pediatric patients. METHODS We did a prospective, single-blinded, observational cohort study at a children's hospital in Siem Reap, Cambodia during periods of dengue outbreak. Ambulatory patients were screened and children ages > 3 month and ≤ 16 years with suspected acute, non-severe dengue were enrolled. Subjects had chest and abdominal ultrasound exams. Independently, subjects were evaluated by a blinded physician who determined a treatment plan as per usual practice. Follow-up was conducted 7-10 days after the initial visit. Analysis of ultrasound findings was performed to determine their relationship with outcome measures including need for unplanned hospital visits or admissions. FINDINGS A total of 2,186 children were screened during periods of national dengue outbreak in Cambodia in consecutive years 2018-2019, and 253 children met eligibility criteria. Results showed patients with gallbladder wall thickening (> 3·0 mm) who were discharged had a significantly more likely need for unplanned visit or hospitalization than those with normal gallbladder wall, 67% (95% CI 44 - 84) versus 17% (95% CI 12 - 24), p < 0.0001. Subjects with any abnormal ultrasound finding were more likely to be directly admitted versus discharged upon initial presentation, 62·2% (95% CI 46.1 - 76.0) versus 19.5% (95% CI 14.8 - 25.4), p < 0.0001. INTERPRETATION Point-of-care ultrasound findings, particularly gallbladder wall thickening, in suspected early dengue can help predict disease progression in ambulatory patients. Ultrasound has potential to help guide management of suspected dengue patients and resource management during periods of dengue outbreak. FUNDING Society for Academic Emergency Medicine Foundation.
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9
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OUP accepted manuscript. Trans R Soc Trop Med Hyg 2022; 116:717-726. [DOI: 10.1093/trstmh/trac004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 09/20/2021] [Accepted: 01/10/2022] [Indexed: 11/14/2022] Open
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Costa LDD, Barros AD, Lorenzo C, Mendonça AVM, Sousa MFD. Percepção da população sobre a atuação das autoridades e das comunidades no controle das arboviroses. SAÚDE EM DEBATE 2022. [DOI: 10.1590/0103-1104202213414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
RESUMO O controle ambiental para a prevenção das arboviroses depende tanto de ações dos poderes públicos quanto do envolvimento das comunidades. A presente pesquisa analisou a percepção de 385 pessoas em 17 municípios das 5 regiões do País sobre a atuação das autoridades e da própria comunidade em relação ao controle e à prevenção da dengue. Independentemente da região, os participantes reconheceram que ações como saneamento básico, coleta regular de lixo, fiscalização de terrenos baldios e domicílios fechados têm sido frequentemente negligenciadas pelas autoridades. A responsabilização da comunidade, na figura do vizinho que não cumpre as medidas de controle, também foi percepção dominante, chamando a atenção a ausência de qualquer reconhecimento sobre como condições sociais desfavoráveis influenciam nas dificuldades para a realização dos procedimentos preventivos. Reflete-se ainda acerca dos prejuízos que a pandemia de Covid-19 tem causado às práticas preventivas e seus possíveis impactos futuros.
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Costa LDD, Barros AD, Lorenzo C, Mendonça AVM, Sousa MFD. Perception of the population on the role of authorities and communities in controlling arboviruses. SAÚDE EM DEBATE 2022. [DOI: 10.1590/0103-1104202213414i] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
ABSTRACT The environmental control for prevention of arboviruses depends both on the actions of public authorities and the involvement of communities. The present study analyzed the perception of 385 citizens of 17 municipalities from the 5 regions of Brazil regarding the actions of the authorities and the community itself in relation to the control and prevention of dengue. The participants acknowledged that actions such as basic sanitation, regular waste collection, inspection of vacant lots and closed homes have often been neglected by the authorities. There was a tendency to hold the community accountable, through the example of neighbors who do not carry out prevention procedures. It was also noteworthy the silencing around unfavorable social conditions that can hinder the implementation of prevention procedures. We also reflected on the damage that the COVID-19 pandemic has caused to preventive practices and its possible future impacts.
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Cunha MDCM, Ju Y, Morais MHF, Dronova I, Ribeiro SP, Bruhn FRP, Lima LL, Sales DM, Schultes OL, Rodriguez DA, Caiaffa WT. Disentangling associations between vegetation greenness and dengue in a Latin American city: Findings and challenges. LANDSCAPE AND URBAN PLANNING 2021; 216:None. [PMID: 34675450 PMCID: PMC8519391 DOI: 10.1016/j.landurbplan.2021.104255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 08/11/2021] [Accepted: 09/14/2021] [Indexed: 05/07/2023]
Abstract
Being a Re-Emerging Infectious Disease, dengue causes 390 million cases globally and is prevalent in many urban areas in South America. Understanding the fine-scale relationships between dengue incidence and environmental and socioeconomic factors can guide improved disease prevention strategies. This ecological study examines the association between dengue incidence and satellite-based vegetation greenness in 3826 census tracts nested in 474 neighborhoods in Belo Horizonte, Brazil, during the 2010 dengue epidemic. To reduce potential bias in the estimated dengue-greenness association, we adjusted for socioeconomic vulnerability, population density, building height and density, land cover composition, elevation, weather patterns, and neighborhood random effects. We found that vegetation greenness was negatively associated with dengue incidence in a univariate model, and this association attenuated after controlling for additional covariates. The dengue-greenness association was modified by socioeconomic vulnerability: while a positive association was observed in the least vulnerable census tracts, the association was negative in the most vulnerable areas. Using greenness as a proxy for vegetation quality, our results show the potential of vegetation management in reducing dengue incidence, particularly in socioeconomically vulnerable areas. We also discuss the role of water infrastructure, sanitation services, and tree cover in lowering dengue risk.
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Affiliation(s)
- Maria da Consolação Magalhães Cunha
- Observatory for Urban health in Belo Horizonte, School of Medicine, Federal University of Minas Gerais, Brazil
- Pontifical Catholic University of Minas Gerais, Brazil
| | - Yang Ju
- Institute of Urban and Regional Development, University of California, 316 Wurster Hall, University of California, Berkeley, Berkeley, CA 94720, USA
- Corresponding author.
| | | | - Iryna Dronova
- Department of Environmental Science, Policy, and Management, Department of Landscape Architecture and Environmental Planning, University of California, Berkeley, USA
| | - Sérvio Pontes Ribeiro
- Laboratory of Ecology of Diseases and Forests, Nucleous of Biology/NUPEB and Institute of Exact and Biological Sciences, Federal University of Ouro Preto, Brazil
| | | | - Larissa Lopes Lima
- Observatory for Urban health in Belo Horizonte, School of Medicine, Federal University of Minas Gerais, Brazil
- Federal Center for Technological Education of Minas Gerais, Brazil
| | - Denise Marques Sales
- Observatory for Urban health in Belo Horizonte, School of Medicine, Federal University of Minas Gerais, Brazil
| | - Olivia Lang Schultes
- Observatory for Urban health in Belo Horizonte, School of Medicine, Federal University of Minas Gerais, Brazil
| | - Daniel A. Rodriguez
- Department of City and Regional Planning and Institute of Transportation Studies, University of California, Berkeley, USA
| | - Waleska Teixeira Caiaffa
- Observatory for Urban health in Belo Horizonte, School of Medicine, Federal University of Minas Gerais, Brazil
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Francisco ME, Carvajal TM, Ryo M, Nukazawa K, Amalin DM, Watanabe K. Dengue disease dynamics are modulated by the combined influences of precipitation and landscape: A machine learning approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 792:148406. [PMID: 34157535 DOI: 10.1016/j.scitotenv.2021.148406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/25/2021] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Dengue is an endemic vector-borne disease influenced by environmental factors such as landscape and climate. Previous studies separately assessed the effects of landscape and climate factors on mosquito occurrence and dengue incidence. However, both factors concurrently coexist in time and space and can interact, affecting mosquito development and dengue disease transmission. For example, eggs laid in a suitable environment can hatch after being submerged in rain water. It has been difficult for conventional statistical modeling approaches to demonstrate these combined influences due to mathematical constraints. OBJECTIVES To investigate the combined influences of landscape and climate factors on mosquito occurrence and dengue incidence. METHODS Entomological, epidemiological, and landscape data from the rainy season (July-December) were obtained from respective government agencies in Metropolitan Manila, Philippines, from 2012 to 2014. Temperature, precipitation and vegetation data were obtained through remote sensing. A random forest algorithm was used to select the landscape and climate variables. Afterward, using the identified key variables, a model-based (MOB) recursive partitioning was implemented to test the combined influences of landscape and climate factors on ovitrap index (vector mosquito occurrence) and dengue incidence. RESULTS The MOB recursive partitioning for ovitrap index indicated a high sensitivity of vector mosquito occurrence on environmental conditions generated by a combination of high residential density areas with low precipitation. Moreover, the MOB recursive partitioning indicated high sensitivity of dengue incidence to the effects of precipitation in areas with high proportions of residential density and commercial areas. CONCLUSIONS Dengue dynamics are not solely influenced by individual effects of either climate or landscape, but rather by their synergistic or combined effects. The presented findings have the potential to target vector surveillance in areas identified as suitable for mosquito occurrence under specific climatic conditions and may be relevant as part of urban planning strategies to control dengue.
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Affiliation(s)
- Micanaldo Ernesto Francisco
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan; Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Thaddeus M Carvajal
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan; Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan; Biology Department, De La Salle University, Taft Ave, Manila 1004, Philippines; Biological Control Research Unit, Center for Natural Science and Environmental Research, De La Salle University, Taft Ave, Manila, Philippines
| | - Masahiro Ryo
- Leibniz Centre for Agricultural Landscape Research (ZALF), Eberswalder Str. 84, 15374 Müncheberg, Germany; Environment and Natural Sciences, Brandenburg University of Technology Cottbus-Senftenberg, 03046 Cottbus, Germany
| | - Kei Nukazawa
- Department of Civil and Environmental Engineering, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Divina M Amalin
- Biology Department, De La Salle University, Taft Ave, Manila 1004, Philippines; Biological Control Research Unit, Center for Natural Science and Environmental Research, De La Salle University, Taft Ave, Manila, Philippines
| | - Kozo Watanabe
- Center for Marine Environmental Studies (CMES), Ehime University, Matsuyama 790-8577, Japan; Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan; Biology Department, De La Salle University, Taft Ave, Manila 1004, Philippines; Biological Control Research Unit, Center for Natural Science and Environmental Research, De La Salle University, Taft Ave, Manila, Philippines.
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Zafar S, Shipin O, Paul RE, Rocklöv J, Haque U, Rahman MS, Mayxay M, Pientong C, Aromseree S, Poolphol P, Pongvongsa T, Vannavong N, Overgaard HJ. Development and Comparison of Dengue Vulnerability Indices Using GIS-Based Multi-Criteria Decision Analysis in Lao PDR and Thailand. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:9421. [PMID: 34502007 PMCID: PMC8430616 DOI: 10.3390/ijerph18179421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 11/17/2022]
Abstract
Dengue is a continuous health burden in Laos and Thailand. We assessed and mapped dengue vulnerability in selected provinces of Laos and Thailand using multi-criteria decision approaches. An ecohealth framework was used to develop dengue vulnerability indices (DVIs) that explain links between population, social and physical environments, and health to identify exposure, susceptibility, and adaptive capacity indicators. Three DVIs were constructed using two objective approaches, Shannon's Entropy (SE) and the Water-Associated Disease Index (WADI), and one subjective approach, the Best-Worst Method (BWM). Each DVI was validated by correlating the index score with dengue incidence for each spatial unit (district and subdistrict) over time. A Pearson's correlation coefficient (r) larger than 0.5 and a p-value less than 0.05 implied a good spatial and temporal performance. Spatially, DVIWADI was significantly correlated on average in 19% (4-40%) of districts in Laos (mean r = 0.5) and 27% (15-53%) of subdistricts in Thailand (mean r = 0.85). The DVISE was validated in 22% (12-40%) of districts in Laos and in 13% (3-38%) of subdistricts in Thailand. The DVIBWM was only developed for Laos because of lack of data in Thailand and was significantly associated with dengue incidence on average in 14% (0-28%) of Lao districts. The DVIWADI indicated high vulnerability in urban centers and in areas with plantations and forests. In 2019, high DVIWADI values were observed in sparsely populated areas due to elevated exposure, possibly from changes in climate and land cover, including urbanization, plantations, and dam construction. Of the three indices, DVIWADI was the most suitable vulnerability index for the study area. The DVIWADI can also be applied to other water-associated diseases, such as Zika and chikungunya, to highlight priority areas for further investigation and as a tool for prevention and interventions.
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Affiliation(s)
- Sumaira Zafar
- Department of Environmental Engineering and Management, Asian Institute of Technology; Pathumthani 12120, Thailand;
| | - Oleg Shipin
- Department of Environmental Engineering and Management, Asian Institute of Technology; Pathumthani 12120, Thailand;
| | - Richard E. Paul
- Unité de la Génétique Fonctionnelle des Maladies Infectieuses, Institut Pasteur, CNRS UMR 2000, 75015 Paris, France;
| | - Joacim Rocklöv
- Department of Public Health and Clinical Medicine, Umeå University, 90187 Umeå, Sweden;
| | - Ubydul Haque
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, North Texas, Fort Worth, TX 76107, USA;
| | - Md. Siddikur Rahman
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (M.S.R.); (C.P.); (S.A.); (H.J.O.)
- Department of Statistics, Begum Rokeya University, Rangpur 5402, Bangladesh
| | - Mayfong Mayxay
- Institute of Research and Education Development (IRED), University of Health Sciences, Ministry of Health, Vientiane 43130, Laos;
- Lao-Oxford-Mahosot Hospital-Welcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane 43130, Laos
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, Old Road Campus, University of Oxford, Oxford OX3 7LG, UK
| | - Chamsai Pientong
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (M.S.R.); (C.P.); (S.A.); (H.J.O.)
| | - Sirinart Aromseree
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (M.S.R.); (C.P.); (S.A.); (H.J.O.)
| | - Petchaboon Poolphol
- The Office of Disease Prevention and Control Region 10(th), Ubon Ratchathani 34000, Thailand;
| | | | | | - Hans J. Overgaard
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (M.S.R.); (C.P.); (S.A.); (H.J.O.)
- Faculty of Science and Technology, Norwegian University of Life Sciences, P.O. Box 5003, 1430 Ås, Norway
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Spatial analysis of the incidence of Dengue, Zika and Chikungunya and socioeconomic determinants in the city of Rio de Janeiro, Brazil. Epidemiol Infect 2021; 149:e188. [PMID: 34338179 PMCID: PMC8365848 DOI: 10.1017/s0950268821001801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In 2015–2016, simultaneous circulation of dengue, Zika and chikungunya in the municipality of Rio de Janeiro (Brazil) was reported. We conducted an ecological study to analyse the spatial distribution of dengue, Zika and chikungunya cases and to investigate socioeconomic factors associated with individual and combined disease incidence in 2015–2016. We then constructed thematic maps and analysed the bivariate global Moran indices. Classical and spatial models were used. A distinct spatial distribution pattern for dengue, Zika and chikungunya was identified in the municipality of Rio de Janeiro. The bivariate global Moran indices (P < 0.05) revealed negative spatial correlations between rates of dengue, Zika, chikungunya and combined arboviruses incidence and social development index and mean income. The regression models (P < 0.05) identified a negative relationship between mean income and each of these rates and between sewage and Zika incidence rates, as well as a positive relationship between urban areas and chikungunya incidence rates. In our study, spatial analysis techniques helped to identify high-risk and social determinants at the local level for the three arboviruses. Our findings may aid in backing effective interventions for the prevention and control of epidemics of these diseases.
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Clancy IL, Jones RT, Power GM, Logan JG, Iriart JAB, Massad E, Kinsman J. Public health messages on arboviruses transmitted by Aedes aegypti in Brazil. BMC Public Health 2021; 21:1362. [PMID: 34243740 PMCID: PMC8272386 DOI: 10.1186/s12889-021-11339-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/30/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The outbreak of Zika virus in Brazil in 2015 followed the arrival of chikungunya in 2014 and a long history of dengue circulation. Vital to the response to these outbreaks of mosquito-borne pathogens has been the dissemination of public health messages, including those promoted through risk communication posters. This study explores the content of a sample of posters circulated in Brazil towards the end of the Zika epidemic in 2017 and analyses their potential effectiveness in inducing behaviour change. METHODS A content analysis was performed on 37 posters produced in Brazil to address outbreaks of mosquito-borne pathogens. The six variables of the Health Belief Model were used to assess the potential effectiveness of the posters to induce behaviour change. RESULTS Three overarching key messages emerged from the posters. These included (i) the arboviruses and their outcomes, (ii) a battle against the mosquito, and (iii) a responsibility to protect and prevent. Among the six variables utilised through the Health Belief Model, cues to action were most commonly featured, whilst the perceived benefits of engaging in behaviours to prevent arbovirus transmission were the least commonly featured. CONCLUSIONS The posters largely focused on mosquito-borne transmission and the need to eliminate breeding sites, and neglected the risk of the sexual and congenital transmission of Zika and the importance of alternative preventive actions. This, we argue, may have limited the potential effectiveness of these posters to induce behaviour change.
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Affiliation(s)
- India L Clancy
- Department of Public Health, Environments & Society, London School of Hygiene & Tropical Medicine, London, UK
| | - Robert T Jones
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, UK
| | - Grace M Power
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, UK
- MRC Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - James G Logan
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, UK.
| | | | - Eduardo Massad
- School of Applied Mathematics, Fundacao Getulio Vargas, Rua Praia de Botafogo 190, Rio de Janeiro, RJ, CEP 22250-900, Brazil
| | - John Kinsman
- Department of Epidemiology and Global Health, Faculty of Medicine, Umeå University, Umeå, Sweden
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Abstract
BACKGROUND The clinical presentation of dengue ranges from self-limited mild illness to severe forms, including death. African ancestry is often described as protective against dengue severity. However, in the Latin American context, African ancestry has been associated with increased mortality. This "severity paradox" has been hypothesized as resulting from confounding or heterogeneity by socioeconomic status (SES). However, few systematic analyses have been conducted to investigate the presence and nature of the disparity paradox. METHODS We fit Bayesian hierarchical spatiotemporal models using individual-level surveillance data from Cali, Colombia (2012-2017), to assess the overall morbidity and severity burden of notified dengue. We fitted overall and ethnic-specific models to assess the presence of heterogeneity by SES across and within ethnic groups (Afro-Colombian vs. non-Afro-Colombians), conducting sensitivity analyses to account for potential underreporting. RESULTS Our study included 65,402 dengue cases and 13,732 (21%) hospitalizations. Overall notified dengue incidence rates did not vary across ethnic groups. Severity risk was higher among Afro-Colombians (risk ratio [RR] = 1.16; 95% Credible Interval [95% CrI] = 1.08, 1.24) but after accounting for underreporting by ethnicity this association was nearly null (RR = 1.02; 95% CrI = 0.97, 1.07). Subsidized health insurance and low-SES were associated with increased overall dengue rates and severity. CONCLUSION The paradoxically increased severity among Afro-Colombians can be attributed to differential health-seeking behaviors and reporting among Afro-Colombians. Such differential reporting can be understood as a type of intersectionality between SES, insurance scheme, and ethnicity that requires a quantitative assessment in future studies.
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Johansen IC, Castro MCD, Alves LC, Carmo RLD. Population mobility, demographic, and environmental characteristics of dengue fever epidemics in a major city in Southeastern Brazil, 2007-2015. CAD SAUDE PUBLICA 2021; 37:e00079620. [PMID: 33886707 DOI: 10.1590/0102-311x00079620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 07/31/2020] [Indexed: 11/22/2022] Open
Abstract
Around 14% of world dengue virus (DENV) cases occur in the Americas, most of them in Brazil. While socioeconomic, environmental, and behavioral correlates have been analyzed thoroughly, the role played by population mobility on DENV epidemics, especially at the local level, remains scarce. This study assesses whether the daily pattern of population mobility is associated with DENV incidence in Campinas, a Brazilian major city with over 1.2 million inhabitants in São Paulo State. DENV notifications from 2007 to 2015 were geocoded at street level (n = 114,884) and combined with sociodemographic and environmental data from the 2010 population census. Population mobility was extracted from the Origin-Destination Survey (ODS), carried out in 2011, and daily precipitation was obtained from satellite imagery. Multivariate zero-inflated negative binomial regression models were applied. High population mobility presented a relevant positive effect on higher risk for DENV incidence. High income and residence in apartments were found to be protective characteristics against the disease, while unpaved streets, number of strategic points (such as scrapyards and tire repair shops), and precipitation were consistently risk factors.
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Production of Proteins prM/M and E of Dengue Virus-3 in Pichia pastoris: Simplified Purification and Evaluation of Their Use as Antigens in Serological Diagnosis of Dengue. FERMENTATION 2020. [DOI: 10.3390/fermentation6030088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Dengue is a major arbovirus affecting humans today. With the growing number of cases, it is essential to have large-scale production of antigens for the development of diagnostic kits for the rapid detection of patients infected by the virus and consequent proper medical intervention for them. In this work, we express the prM/M and E proteins of dengue virus-3 in yeast Pichia pastoris KM71H. The proteins were produced in soluble form in the supernatant of the culture and were purified by precipitation with ammonium sulfate. The fraction of 80% of ammonium sulfate was used as an antigen in an indirect enzyme-linked immunosorbent assay (ELISA), providing a sensitivity of 82.61% and a specificity of 89.25%. Thus, the methodology proposed here showed promise for obtaining antigens of dengue viruses and creating quick and inexpensive diagnostic tests, which is of great value since large portions of the areas affected by this disease are economically neglected.
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Hsieh TH, Tsai TT, Chen CL, Shen TJ, Jhan MK, Tseng PC, Lin CF. Senescence in Monocytes Facilitates Dengue Virus Infection by Increasing Infectivity. Front Cell Infect Microbiol 2020; 10:375. [PMID: 32850477 PMCID: PMC7399640 DOI: 10.3389/fcimb.2020.00375] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/18/2020] [Indexed: 01/09/2023] Open
Abstract
Aging and chronic condition increase the incidence of dengue virus (DENV) infection, generally through a mechanism involving immunosenescence; however, the alternative effects of cellular senescence, which alters cell susceptibility to viral infection, remain unknown. Human monocytic THP-1 cells (ATCC TIB-202) treated with D-galactose to induce cellular senescence were susceptible to DENV infection. These senescent cells showed increased viral entry/binding, gene/protein expression, and dsRNA replication. The use of a replicon system showed that pharmacologically induced senescence did not enhance the effects on viral protein translation. By examining viral receptor expression, we found increased expression of CD209 (DC-SIGN) in the senescent cells. Interleukin (IL)-10 was aberrantly produced at high levels by the senescent cells, and the expression of the DENV receptor DC-SIGN was increased in these senescent cells, partially via IL-10-mediated regulation of the JAK2-STAT3 signaling pathway. The results demonstrate that a senescent phenotype facilitates DENV infection, probably by increasing DC-SIGN expression.
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Affiliation(s)
- Tzu-Han Hsieh
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tsung-Ting Tsai
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chia-Ling Chen
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ting-Jing Shen
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ming-Kai Jhan
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Po-Chun Tseng
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Core Laboratory of Immune Monitoring, Office of Research and Development, Taipei Medical University, Taipei, Taiwan
| | - Chiou-Feng Lin
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Core Laboratory of Immune Monitoring, Office of Research and Development, Taipei Medical University, Taipei, Taiwan.,Center of Infectious Diseases and Signaling Research, National Cheng Kung University, Tainan, Taiwan
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