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Leng XY, Zhao LZ, Liao L, Jin KH, Feng JM, Zhang FC. Genotype of dengue virus serotype 1 in relation to severe dengue in Guangzhou, China. J Med Virol 2024; 96:e29635. [PMID: 38682660 DOI: 10.1002/jmv.29635] [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: 01/14/2024] [Revised: 04/09/2024] [Accepted: 04/17/2024] [Indexed: 05/01/2024]
Abstract
Guangzhou has been the city most affected by the dengue virus (DENV) in China, with a predominance of DENV serotype 1 (DENV-1). Viral factors such as dengue serotype and genotype are associated with severe dengue (SD). However, none of the studies have investigated the relationship between DENV-1 genotypes and SD. To understand the association between DENV-1 genotypes and SD, the clinical manifestations of patients infected with different genotypes were investigated. A total of 122 patients with confirmed DENV-1 genotype infection were recruited for this study. The clinical manifestations, laboratory tests, and levels of inflammatory mediator factors were statistically analyzed to investigate the characteristics of clinical manifestations and immune response on the DENV-1 genotype. In the case of DENV-1 infection, the incidence of SD with genotype V infection was significantly higher than that with genotype I infection. Meanwhile, patients infected with genotype V were more common in ostealgia and bleeding significantly. In addition, levels of inflammatory mediator factors including IFN-γ, TNF-α, IL-10, and soluble vascular cell adhesion molecule 1 were higher in patients with SD infected with genotype V. Meanwhile, the concentrations of regulated upon activation normal T-cell expressed and secreted and growth-related gene alpha were lower in patients with SD infected with genotype V. The higher incidence of SD in patients infected with DENV-1 genotype V may be attributed to elevated cytokines and adhesion molecules, along with decreased chemokines.
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Affiliation(s)
- Xing-Yu Leng
- Department of Infectious Disease, Guangzhou Medical Research Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Medical Research Institute of Infectious Diseases, Institution of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Ling-Zhai Zhao
- Department of Clinical Laboratory, Guangzhou Eighth People's Hospital, Guangzhou Medical Research Institute of Infectious Diseases, Guangzhou Medical University, Guangzhou, China
| | - Lu Liao
- Department of Infectious Disease, Guangzhou Medical Research Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Medical Research Institute of Infectious Diseases, Institution of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Kang-Hong Jin
- Department of Infectious Disease, Guangzhou Medical Research Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Medical Research Institute of Infectious Diseases, Institution of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jia-Min Feng
- Guangzhou Medical Research Institute of Infectious Diseases, Institution of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Fu-Chun Zhang
- Department of Infectious Disease, Guangzhou Medical Research Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Medical Research Institute of Infectious Diseases, Institution of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
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Bueno-Marí R, Domínguez-Santos R, Trelis M, Garrote-Sánchez E, Cholvi M, Quero de Lera F, Khoubbane M, Marcilla A, Gil R. [ Wolbachia pipientis infections in populations of Aedes albopictus in the city of València (Spain): implications for mosquito control.]. Rev Esp Salud Publica 2023; 97:e202303017. [PMID: 36883556 PMCID: PMC10560531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 02/13/2023] [Indexed: 03/09/2023] Open
Abstract
OBJECTIVE The presence of Aedes albopictus, of high sanitary and social impact, was first reported in Valencia (Eastern Spain) in 2015. Innovative tools for its control include the use of the endosymbiotic bacterium Wolbachia pipientis. The release of mosquito males infected with the wPip strain, has proven very promising for large-scale Incompatible Insect Technique (IIT) applications. Before this strategy can be implemented in Valencia, it is important to know whether the natural local mosquito populations are Wolbachia-infected and, if so, identifying the infecting strains/supergroups, these being the objectives of the present work. METHODS Eggs were collected from the 19 districts of the València city between May and October 2019. A total of 50 lab-reared adult Ae. albopictus individuals were processed and analyzed for Wolbachia detection and molecular characterization. These actions took place within the framework of a collaboration established with the Department of Health and Consumer Affairs of the city council of Valencia. Fisher's exact test was used to detect the statistical significance of the differences between groups. RESULTS Our study revealed that 94% of the analyzed samples were naturally infected with Wolbachia. Both wAlbA and wAlbB supergroups were identified, with most samples (72% of the infected ones) carrying co-infections. CONCLUSIONS These data provide the first characterization of the Wolbachia presence in natural populations of Ae. albopictus in the Mediterranean area of Spain. This information is relevant to evaluate the potential use of Wolbachia strains in order to achieve the suppression of the Asian tiger mosquito populations through massive release of artificially-infected males.
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Affiliation(s)
- Rubén Bueno-Marí
- Departamento de Investigación y Desarrollo (I+D), Laboratorios Lokímica. Paterna (València). España
- Área de Parasitología, Departamento de Farmacia y Tecnología Farmacéutica y Parasitología, Universitat de València. Burjassot (València). España
| | - Rebeca Domínguez-Santos
- Instituto de Biología Integrativa de Sistemas (I2SysBio), Universitat de València/CSIC. Paterna (València). España
| | - María Trelis
- Área de Parasitología, Departamento de Farmacia y Tecnología Farmacéutica y Parasitología, Universitat de València. Burjassot (València). España
- Unidad Mixta de Endocrinología, Nutrición y Dietética Clínica, Instituto de Investigación Sanitaria La Fe. València. España
| | - Emilio Garrote-Sánchez
- Instituto de Biología Integrativa de Sistemas (I2SysBio), Universitat de València/CSIC. Paterna (València). España
| | - María Cholvi
- Área de Parasitología, Departamento de Farmacia y Tecnología Farmacéutica y Parasitología, Universitat de València. Burjassot (València). España
| | | | - Messaoud Khoubbane
- Área de Parasitología, Departamento de Farmacia y Tecnología Farmacéutica y Parasitología, Universitat de València. Burjassot (València). España
| | - Antonio Marcilla
- Área de Parasitología, Departamento de Farmacia y Tecnología Farmacéutica y Parasitología, Universitat de València. Burjassot (València). España
- Unidad Mixta de Endocrinología, Nutrición y Dietética Clínica, Instituto de Investigación Sanitaria La Fe. València. España
| | - Rosario Gil
- Instituto de Biología Integrativa de Sistemas (I2SysBio), Universitat de València/CSIC. Paterna (València). España
- Área de Genómica y Salud, Fundación para el Fomento de la Investigación Sanitaria y Biomédica de la Com. Valenciana (FISABIO). València. España
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Togami E, Chiew M, Lowbridge C, Biaukula V, Bell L, Yajima A, Eshofonie A, Saulo D, Hien DTH, Otsu S, Dai TC, Ngon MS, Lee CK, Tsuyuoka R, Tuseo L, Khalakdina A, Kab V, Abeyasinghe RR, Yadav RP, Esguerra P, Casey S, Soo CP, Fukusumi M, Matsui T, Olowokure B. Epidemiology of dengue reported in the World Health Organization's Western Pacific Region, 2013-2019. Western Pac Surveill Response J 2023; 14:1-16. [PMID: 37064541 PMCID: PMC10090032 DOI: 10.5365/wpsar.2023.14.1.973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023] Open
Abstract
The global burden of dengue, an emerging and re-emerging mosquito-borne disease, increased during the 20-year period ending in 2019, with approximately 70% of cases estimated to have been in Asia. This report describes the epidemiology of dengue in the World Health Organization's Western Pacific Region during 2013-2019 using regional surveillance data reported from indicator-based surveillance systems from countries and areas in the Region, supplemented by publicly available dengue outbreak situation reports. The total reported annual number of dengue cases in the Region increased from 430 023 in 2013 to 1 050 285 in 2019, surpassing 1 million cases for the first time in 2019. The reported case-fatality ratio ranged from 0.19% (724/376 972 in 2014 and 2030/1 050 285 in 2019) to 0.30% (1380/458 843 in 2016). The introduction or reintroduction of serotypes to specific areas caused several outbreaks and rare occurrences of local transmission in places where dengue was not previously reported. This report reinforces the increased importance of dengue surveillance systems in monitoring dengue across the Region.
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Affiliation(s)
- Eri Togami
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - May Chiew
- World Health Organization Representative Office for Lao People’s Democratic Republic, Vientiane, Lao People’s Democratic Republic
| | - Christopher Lowbridge
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Viema Biaukula
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Leila Bell
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Aya Yajima
- Division of Programmes for Disease Control, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Anthony Eshofonie
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Dina Saulo
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Do Thi Hong Hien
- World Health Organization Representative Office for Viet Nam, Hanoi, Viet Nam
| | - Satoko Otsu
- World Health Organization Representative Office for Viet Nam, Hanoi, Viet Nam
| | - Tran Cong Dai
- World Health Organization Representative Office for Viet Nam, Hanoi, Viet Nam
| | - Mya Sapal Ngon
- World Health Organization Representative Office for Viet Nam, Hanoi, Viet Nam
| | - Chin-Kei Lee
- World Health Organization Representative Office for China, Beijing, China
| | - Reiko Tsuyuoka
- World Health Organization Representative Office for Lao People’s Democratic Republic, Vientiane, Lao People’s Democratic Republic
| | - Luciano Tuseo
- World Health Organization Representative Office for Cambodia, Phnom Penh, Cambodia
| | - Asheena Khalakdina
- World Health Organization Representative Office for Cambodia, Phnom Penh, Cambodia
| | - Vannda Kab
- World Health Organization Representative Office for Cambodia, Phnom Penh, Cambodia
| | | | - Rajendra Prasad Yadav
- World Health Organization Representative Office for the Philippines, Manila, the Philippines
| | - Princess Esguerra
- World Health Organization Representative Office for the Philippines, Manila, the Philippines
| | - Sean Casey
- Division of Pacific Technical Support, World Health Organization, Suva, Fiji
| | - Chun Paul Soo
- World Health Organization Representative Office for Malaysia, Cyberjaya, Malaysia
| | - Munehisa Fukusumi
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Tamano Matsui
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
| | - Babatunde Olowokure
- Health Emergencies Programme, World Health Organization Regional Office for the Western Pacific, Manila, the Philippines
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4
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Roslan MA, Ngui R, Vythilingam I, Wan Sulaiman WY. Community surveillance of Aedes albopictus associated with Wolbachia detection in low-rise residential areas in Selangor, Malaysia. JOURNAL OF VECTOR ECOLOGY : JOURNAL OF THE SOCIETY FOR VECTOR ECOLOGY 2022; 47:142-152. [PMID: 36314668 DOI: 10.52707/1081-1710-47.2.142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/20/2022] [Indexed: 06/16/2023]
Abstract
The study assessed the distribution of Malaysian Ae. albopictus adults associated with Wolbachia detection in low-rise residential areas using a modified sticky ovitrap (MSO). The relationship between Ae. albopictus and climatological parameters were also determined. Fifty-two weeks of surveillance using 273 MSOs were conducted in four installation areas of eleven sampling sites. Specimens were subjected to PCR using wsp-specific primers for Wolbachia detection. The relationship between climatological parameters and Ae. albopictus captured were analyzed using Spearman rank correlation coefficient test. The majority of Ae. albopictus were captured in residential houses (87%), followed by playgrounds or parks (11.5%), guardhouses (1%), and community halls (0.5%). Most of the specimens (92%) were superinfected with wAlbA and wAlbB strains. A positive correlation with no significant association was found for rainfall (r = 0.015, P = 0.072), relative humidity (r = 0.005, P = 0.526), minimum temperature (r = 0.005, P = 0.516), and mean temperature (r = 0.003, P = 0.689). MSO effectively captured a high number of Ae. albopictus that was determined to be the predominant mosquito species found in low-rise residential areas. The adult collection is not only influenced by climatological parameters but also by other factors, including environmental conditions and general sanitation status.
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Affiliation(s)
- Muhammad Aidil Roslan
- Department of Parasitology, Faculty of Medicine, Universiti Malaya 50603 Kuala Lumpur, Malaysia
- Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Universiti Malaya 50603 Kuala Lumpur, Malaysia
- Office of Deputy Vice-Chancellor (Student Affairs), Universiti Malaya 50603 Kuala Lumpur, Malaysia
| | - Romano Ngui
- Department of Parasitology, Faculty of Medicine, Universiti Malaya 50603 Kuala Lumpur, Malaysia
| | - Indra Vythilingam
- Department of Parasitology, Faculty of Medicine, Universiti Malaya 50603 Kuala Lumpur, Malaysia
| | - Wan Yusoff Wan Sulaiman
- Department of Parasitology, Faculty of Medicine, Universiti Malaya 50603 Kuala Lumpur, Malaysia,
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5
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Etiology of acute febrile illnesses in Southern China: Findings from a two-year sentinel surveillance project, 2017–2019. PLoS One 2022; 17:e0270586. [PMID: 35763515 PMCID: PMC9239456 DOI: 10.1371/journal.pone.0270586] [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: 02/23/2022] [Accepted: 06/13/2022] [Indexed: 11/19/2022] Open
Abstract
Background Southern China is at risk for arborvirus disease transmission, including Zika virus and dengue. Patients often present to clinical care with non-specific acute febrile illnesses (AFI). To better describe the etiology of AFI, we implemented a two-year AFI surveillance project at five sentinel hospitals in Yunnan and Guangdong Provinces. Methods Between June 2017 and August 2019, we enrolled patients between 2 and 65 years of age presenting at one sentinel hospital in Mengla County, Yunnan, and four in Jiangmen City, Guangdong, with symptoms of AFI (acute onset of fever ≥ 37.5°C within the past 7 days) without respiratory symptoms or diarrhea. Demographic, epidemiologic, and clinical information was obtained and entered into a web-based AFI surveillance database. A custom TaqMan Array card (TAC) was used to test patients’ whole blood specimens for 27 different pathogens using real-time polymerase chain reaction assays. Results During the two-year project period, 836 patients were enrolled; 443 patients from Mengla County and 393 patients from Jiangmen City. The median age was 33 years [range: 2–65], and most were hospitalized [641, 77%]. Of 796 patients with valid TAC results, 341 (43%) were positive for at least one of the 10 unique pathogens detected. This included 205 (26%) patients positive for dengue virus, 60 (8%) for Orientia tsutsugamushi, and 42 (5%) for Coxiella burnetii. Ten patients (1%) in Jiangmen City tested positive for malaria, 8 of whom reported recent travel outside of China. TAC results were negative for 455 (57%) patients. None of the patients had a positive TAC detection for Zika virus. Conclusions The project detected variability in the etiology of AFI in Southern China and highlighted the importance of differential diagnosis. Dengue, O. tsutsugamushi, and C. burnetii were the most frequently identified pathogens among enrolled AFI patients. As a non-notifiable disease, the frequent detection of C. burnetii is noteworthy and warrants additional investigation. The project provided a framework for routine surveillance for persons presenting with AFI.
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6
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Wu S, He Y, Wei Y, Fan P, Ni W, Zhong D, Zhou G, Zheng X. Effects of Guangzhou seasonal climate change on the development of Aedes albopictus and its susceptibility to DENV-2. PLoS One 2022; 17:e0266128. [PMID: 35363810 PMCID: PMC8975156 DOI: 10.1371/journal.pone.0266128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 03/15/2022] [Indexed: 12/21/2022] Open
Abstract
The susceptibility of Asian tiger mosquitoes to DENV-2 in different seasons was observed in simulated field environments as a reference to design dengue fever control strategies in Guangzhou. The life table experiments of mosquitoes in four seasons were carried out in the field. The susceptibility of Ae. albopictus to dengue virus was observed in both environments in Guangzhou in summer and winter. Ae. albopictus was infected with dengue virus by oral feeding. On day 7 and 14 after infection, the viral load in the head, ovary, and midgut of the mosquito was detected using real-time fluorescent quantitative PCR. Immune-associated gene expression in infected mosquitoes was performed using quantitative real-time reverse transcriptase PCR. The hatching rate and pupation rate of Ae. albopictus larvae in different seasons differed significantly. The winter hatching rate of larvae was lower than that in summer, and the incubation time was longer than in summer. In the winter field environment, Ae. albopictus still underwent basic growth and development processes. Mosquitoes in the simulated field environment were more susceptible to DENV-2 than those in the simulated laboratory environment. In the midgut, viral RNA levels on day 7 in summer were higher than those on day 7 in winter (F = 14.459, P = 0.01); ovarian viral RNA levels on day 7 in summer were higher than those on day 7 in winter (F = 8.656, P < 0.001), but there was no significant difference in the viral load at other time points (P > 0.05). Dicer-2 mRNA expression on day 7 in winter was 4.071 times than that on day 7 in summer: the viral load and Dicer-2 expression correlated moderately. Ae. albopictus could still develop and transmit dengue virus in winter in Guangzhou. Mosquitoes under simulated field conditions were more susceptible to DENV-2 than those under simulated laboratory conditions.
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Affiliation(s)
- Shanshan Wu
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yulan He
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yong Wei
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Peiyang Fan
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Weigui Ni
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Daibin Zhong
- Program in Public Health, College of Health Sciences, University of California, Irvine, CA, United States of America
| | - Guofa Zhou
- Program in Public Health, College of Health Sciences, University of California, Irvine, CA, United States of America
| | - Xueli Zheng
- Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
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7
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Barzon L, Gobbi F, Capelli G, Montarsi F, Martini S, Riccetti S, Sinigaglia A, Pacenti M, Pavan G, Rassu M, Padovan MT, Manfrin V, Zanella F, Russo F, Foglia F, Lazzarini L. Autochthonous dengue outbreak in Italy 2020: clinical, virological and entomological findings. J Travel Med 2021; 28:6354471. [PMID: 34409443 PMCID: PMC8499737 DOI: 10.1093/jtm/taab130] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/08/2021] [Accepted: 08/09/2021] [Indexed: 12/02/2022]
Abstract
BACKGROUND In August 2020, in the context of COVID-19 pandemics, an autochthonous dengue outbreak was identified for the first time in Italy. METHODS Following the reporting of the index case of autochthonous dengue, epidemiological investigation, vector control and substances of human origin safety measures were immediately activated, according to the national arbovirus surveillance plan. Dengue cases were followed-up with weekly visits and laboratory tests until recovery and clearance of viral RNA from blood. RESULTS The primary dengue case was identified in a young woman, who developed fever after returning from Indonesia to northern Italy, on 27 July 2020. She spent the mandatory quarantine for COVID-19 at home with relatives, six of whom developed dengue within two weeks. Epidemiological investigation identified further five autochthonous dengue cases among people who lived or stayed near the residence of the primary case. The last case of the outbreak developed fever on 29 September 2020. Dengue cases had a mild febrile illness, except one with persistent asthenia and myalgia. DENV-1 RNA was detected in blood and/or urine in all autochthonous cases, up to 35 days after fever onset. All cases developed IgM and IgG antibodies which cross-reacted with West Nile virus (WNV) and other flaviviruses. Sequencing of the full viral genome from blood samples showed over 99% nucleotide identity with DENV-1 strains isolated in China in 2014-2015; phylogenetic analysis classified the virus within Genotype I. Entomological site inspection identified a high density of Aedes albopictus mosquitoes, which conceivably sustained local DENV-1 transmission. Aedes koreicus mosquitoes were also collected in the site. CONCLUSIONS Areas in Europe with high density of Aedes mosquitoes should be considered at risk for dengue transmission. The presence of endemic flaviviruses, such as WNV, might pose problems in the laboratory diagnosis.
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Affiliation(s)
- Luisa Barzon
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Department of Molecular Medicine, University of Padova, via A. Gabelli 63, 35121 Padova, Italy.,Microbiology and Virology Unit, Padova University Hospital, Via Giustiniani 2, 35128 Padova, Italy
| | - Federico Gobbi
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Department of Infectious/Tropical Diseases and Microbiology, IRCCS Sacro Cuore Don Calabria Hospital, Via Luigi Rizzardi 4, 37024, Negrar di Valpolicella, Verona, Italy
| | - Gioia Capelli
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università 10, 35020 Legnaro, Padova, Italy
| | - Fabrizio Montarsi
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università 10, 35020 Legnaro, Padova, Italy
| | - Simone Martini
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Entostudio s.r.l., Viale del Lavoro, 66, 35020 Ponte San Nicolò, Padova, Italy
| | - Silvia Riccetti
- Department of Molecular Medicine, University of Padova, via A. Gabelli 63, 35121 Padova, Italy
| | - Alessandro Sinigaglia
- Department of Molecular Medicine, University of Padova, via A. Gabelli 63, 35121 Padova, Italy
| | - Monia Pacenti
- Microbiology and Virology Unit, Padova University Hospital, Via Giustiniani 2, 35128 Padova, Italy
| | - Giacomina Pavan
- Department of Microbiology, St. Bortolo Hospital, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
| | - Mario Rassu
- Department of Microbiology, St. Bortolo Hospital, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
| | - Maria Teresa Padovan
- Department of Public Health, Azienda AULSS8 Berica, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
| | - Vinicio Manfrin
- Department of Infectious Diseases, St. Bortolo Hospital, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
| | - Francesca Zanella
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Direzione Prevenzione, Sicurezza Alimentare Veterinaria, Dorsoduro, 3493 - Rio Nuovo - 30123 Venice, Italy
| | - Francesca Russo
- Veneto Region Arbovirosis Task Force, Dorsoduro, 3493 - Rio Nuovo - 30123 Venezia, Italy.,Direzione Prevenzione, Sicurezza Alimentare Veterinaria, Dorsoduro, 3493 - Rio Nuovo - 30123 Venice, Italy
| | - Felice Foglia
- Department of Public Health, Azienda AULSS8 Berica, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
| | - Luca Lazzarini
- Department of Infectious Diseases, St. Bortolo Hospital, Viale Ferdinando Rodolfi 37, 36100 Vicenza, Italy
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Zhang L, Zhao L, Zhang Z, Hong W, Wang J, Qiu S, Yang H, Gan M, Sun J, Zhao J, Wang Y, Zhao J, Zhang F. Genetic and pathogenicity diversity of dengue virus type 2 strains circulating in Guangdong, China. BIOSAFETY AND HEALTH 2021. [DOI: 10.1016/j.bsheal.2021.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Zhao S, Musa SS, Meng J, Qin J, He D. The long-term changing dynamics of dengue infectivity in Guangdong, China, from 2008-2018: a modelling analysis. Trans R Soc Trop Med Hyg 2021; 114:62-71. [PMID: 31638154 DOI: 10.1093/trstmh/trz084] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 07/02/2019] [Accepted: 07/19/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Dengue remains a severe threat to public health in tropical and subtropical regions. In China, over 85% of domestic dengue cases are in the Guangdong province and there were 53 139 reported cases during 2008-2018. In Guangdong, the 2014 dengue outbreak was the largest in the last 20 y and it was probably triggered by a new strain imported from other regions. METHODS We studied the long-term patterns of dengue infectivity in Guangdong from 2008-2018 and compared the infectivity estimates across different periods. RESULTS We found that the annual epidemics approximately followed exponential growth during 2011-2014. The transmission rates were at a low level during 2008-2012, significantly increased 1.43-fold [1.22, 1.69] during 2013-2014 and then decreased back to a low level after 2015. By using the mosquito index and the likelihood-inference approach, we found that the new strain most likely invaded Guangdong in April 2014. CONCLUSIONS The long-term changing dynamics of dengue infectivity are associated with the new dengue virus strain invasion and public health control programmes. The increase in infectiousness indicates the potential for dengue to go from being imported to becoming an endemic in Guangdong, China.
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Affiliation(s)
- Shi Zhao
- School of Nursing, Hong Kong Polytechnic University, Hong Kong, China.,Department of Applied Mathematics, Hong Kong Polytechnic University, Hong Kong, China
| | - Salihu S Musa
- Department of Applied Mathematics, Hong Kong Polytechnic University, Hong Kong, China
| | - Jiayi Meng
- School of Economics and Finance, Xi'an International Studies University, Xi'an, China
| | - Jing Qin
- School of Nursing, Hong Kong Polytechnic University, Hong Kong, China
| | - Daihai He
- Department of Applied Mathematics, Hong Kong Polytechnic University, Hong Kong, China
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10
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Calvez E, Somlor S, Viengphouthong S, Balière C, Bounmany P, Keosenhom S, Caro V, Grandadam M. Rapid genotyping protocol to improve dengue virus serotype 2 survey in Lao PDR. PLoS One 2020; 15:e0237384. [PMID: 32764809 PMCID: PMC7413503 DOI: 10.1371/journal.pone.0237384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 07/24/2020] [Indexed: 12/30/2022] Open
Abstract
Dengue fever is one of the major public health problems in Lao PDR. Over the last decade, dengue virus (DENV) epidemics were characterized by a novel predominant serotype accompanied by at least two other serotypes. Since 2008, DENV-2 circulated at a low level in Lao PDR but its epidemiologic profile changed at the end of 2018. Indeed, the number of confirmed DENV-2 cases suddenly increased in October 2018 and DENV-2 became predominant at the country level in early 2019. We developed a Genotype Screening Protocol (GSP) to determine the origin(s) of the Lao DENV-2 and study their genetic polymorphism. With a good correlation with full envelope gene sequencing data, this molecular epidemiology tool evidence the co-circulation of two highly polymorphic DENV-2 genotypes, i.e. Asian I and Cosmopolitan genotypes, over the last five years, suggesting multiple introductions of DENV-2 in the country. GSP approach provides relevant first line information that may help countries with limited laboratory resources to reinforce their capabilities to DENV-2 and to follow the epidemics progresses and assess situations at the regional level.
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Affiliation(s)
- Elodie Calvez
- Institut Pasteur du Laos, Vientiane, Lao People’s Democratic Republic
- * E-mail:
| | - Somphavanh Somlor
- Institut Pasteur du Laos, Vientiane, Lao People’s Democratic Republic
| | | | | | | | - Sitsana Keosenhom
- Institut Pasteur du Laos, Vientiane, Lao People’s Democratic Republic
| | | | - Marc Grandadam
- Institut Pasteur du Laos, Vientiane, Lao People’s Democratic Republic
- Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
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11
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Zheng Z, Li M, Liu Z, Jin X, Sun J. Establishment of Murine Infection Models with Biological Clones of Dengue Viruses Derived from a Single Clinical Viral Isolate. Virol Sin 2020; 35:626-636. [PMID: 32451883 PMCID: PMC7246292 DOI: 10.1007/s12250-020-00229-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 03/11/2020] [Indexed: 01/25/2023] Open
Abstract
Dengue virus (DENV) is a single-stranded RNA virus transmitted by mosquitoes in tropical and subtropical regions. It causes dengue fever, dengue hemorrhagic fever and dengue shock syndrome in patients. Each year, 390 million people are estimated to be infected by four serotypes of dengue virus, creating a great burden on global public health and local economy. So far, no antiviral drug is available for dengue disease, and the newly licensed vaccine is far from satisfactory. One large obstacle for dengue vaccine and drug development is the lack of suitable small animal models. Although some DENV infection models have been developed, only a small number of viral strains can infect immunodeficient mice. In this study, with biologically cloned viruses from a single clinical isolate, we have established two mouse models of DENV infection, one is severe lethal infection in immunocompromised mice, and the other resembles self-limited disease manifestations in Balb/c mice with transient blockage of type I IFN responses. This study not only offers new small animal models of dengue viral infection, but also provides new viral variants for further investigations on dengue viral pathogenesis.
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Affiliation(s)
- Zhihang Zheng
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 200031, Shanghai, China.,Chinese Academy of Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China.,Shanghai Public Health Clinical Center, Fudan University, 201508, Shanghai, China
| | - Min Li
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 200031, Shanghai, China
| | - Zhihua Liu
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 200031, Shanghai, China.,Chinese Academy of Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China.,Shanghai Public Health Clinical Center, Fudan University, 201508, Shanghai, China
| | - Xia Jin
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 200031, Shanghai, China. .,Shanghai Public Health Clinical Center, Fudan University, 201508, Shanghai, China.
| | - Jin Sun
- CAS Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, 200031, Shanghai, China.
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12
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Agustiningrum I, Nugraha J, Kahar H. MCP-1 LEVELS AND ATYPICAL LYMPHOCYTES IN EARLY FEVER OF DENGUE VIRUS INFECTION WITH NON-STRUCTURAL PROTEIN 1 (NS-1) ANTIGEN TEST IN dr DARSONO HOSPITAL, PACITAN. INDONESIAN JOURNAL OF TROPICAL AND INFECTIOUS DISEASE 2020. [DOI: 10.20473/ijtid.v8i1.12696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dengue infection caused by DENV and transmitted by mosquitoes Aedes aegypti and Aedes albopictus is a major health problem in the world, including Indonesia. Clinical manifestations of dengue infection are very widely, from asymptomatic until dengue shock syndrome (DSS). DENV will attack macrophages and dendritic cells (DC) and replicate them. Monocytes are macrophages in the blood (±10% leukocytes). Macrophages produce cytokines and chemokines such as monocyte chemotactic protein-1 (MCP-1)/CCL2. The monocytes that are infected with DENV will express MCP-1, which will increase the permeability of vascular endothelial cells so that they have a risk of developing DHF/DSS. Macrophages and DC secrete NS1 proteins, which are the co-factors that are needed for viral replication and can be detected in the early phase of fever. The increased MCP-1 levels in dengue infection followed by an increase in the number of atypical lymphocytes indicate the arrival of macrophages and monocytes to the site of inflammation which triggers proliferation rather than lymphocytes. This is an observational analytical study with a cross-sectional design to determine the MCP-1 level in dengue infection patients with 1st until the 4th day of fever and the presence of atypical lymphocytes. Dengue infection was determined by rapid tests NS1 positive or negative and MCP-1 levels were measured using by ELISA sandwich method.MCP-1 level of sixty patients dengue infection NS-1 rapid positive or negative with 2nd until 4rt fever were significantly higher than healthy subjects (420.263±158,496vs29, 475±23.443;p=0.000), but there was no significant difference in subjects with DF, DHF or DSS (436,47±225,59 vs422,77±170,55vs 448,50±117,39; p =0.844). Atypicallymphosite differs significantly in healthy subjects than subjects infected with DENV an average of 2% (p= 0,000). In conclusion, this shows the arrival of macrophages and monocytes to the site of inflammation, which triggers the proliferation of lymphocytes.
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13
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Liao F, Chen H, Xie J, Zhan S, Pan P, Lao Z, Fan Y, Lin L, Lai Y, Lin S, Wu J, Liu X, Li G. Molecular epidemiological characteristics of dengue virus carried by 34 patients in Guangzhou in 2018. PLoS One 2019; 14:e0224676. [PMID: 31725752 PMCID: PMC6855448 DOI: 10.1371/journal.pone.0224676] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/19/2019] [Indexed: 11/18/2022] Open
Abstract
Dengue fever is a major worldwide public health problem that, as estimated by the WHO, causes epidemics in over 100 countries, resulting in hundreds of millions of dengue virus (DENV) infections every year. In China, dengue fever mainly occurs in coastal areas. Recurring dengue outbreaks were reported by Guangdong Province almost every year since the first epidemic in 1978. DENV infections persisted in Guangzhou in consecutive years since 2000, with the dengue epidemic reaching a historical peak in 2014. Because Guangzhou is one of the largest cities for opening up in China, understanding the epidemiological characteristics of dengue fever in the city can hopefully provide a significant basis for developing effective dengue prevention strategies. In this study, a total of 34 DENV strains, including 29 DENV-1 strains and 5 DENV-2 strains, were isolated from a blood samples drawn from patients who were diagnosed with dengue fever by hospitals in Guangzhou during 2018. To explore the epidemiological characteristics of dengue fever, the envelope (E) gene obtained from the isolates was amplified for phylogenetic analysis. The results from the phylogenetic analysis showed that DENV in Guangzhou was mainly imported from Southeast Asian countries. Additionally, propagation paths based on phylogeographical analysis suggested potential local dengue transmission in Guangzhou.
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Affiliation(s)
- Feng Liao
- Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Huini Chen
- Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Jieliang Xie
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shaofeng Zhan
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Pan Pan
- College of Life Sciences, WuHan university, Wuhan, China
| | - Zizhao Lao
- Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yaohua Fan
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lupin Lin
- Guangzhou eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yanni Lai
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shuangfeng Lin
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianguo Wu
- Institute of Medical Microbiology, Jinan University, Guangzhou, China
| | - Xiaohong Liu
- Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Geng Li
- Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- * E-mail:
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14
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Li J, Dong Y, Sun Y, Lai Z, Zhao Y, Liu P, Gao Y, Chen X, Gu J. A Novel Densovirus Isolated From the Asian Tiger Mosquito Displays Varied Pathogenicity Depending on Its Host Species. Front Microbiol 2019; 10:1549. [PMID: 31333635 PMCID: PMC6624781 DOI: 10.3389/fmicb.2019.01549] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/20/2019] [Indexed: 11/18/2022] Open
Abstract
Mosquito-borne viral diseases (MBVDs) continue to pose a significant global public health burden. Mosquito control remains a core intervention strategy in integrated mosquito management (IMM) programs to reduce the transmission of MBVDs. Mosquito densoviruses (MDVs) are mosquito-specific entomopathogenic viruses, and their attractive biological and pathogenic characteristics make MDVs potential biological control agents as alternatives to traditional chemical pesticides. However, different viral strains vary greatly in their pathogenicity against different mosquito species, which poses an obstacle for the wide application of MDVs in vector control. In this study, a novel MDV, Aedes albopictus densovirus-7 (AalDV-7), was isolated from field-collected Aedes albopictus in the dengue-endemic area of Guangzhou, China. The complete 4,048 nt genome of AalDV-7 was cloned and sequenced, and the transcription and translation of three open reading frames (ORFs) were characterized. Phylogenetic analysis indicated that AalDV-7 clustered with MDVs mostly isolated from indigenous mosquitoes. The pathogenicity of AalDV-7 to A. albopictus, Aedes aegypti, and Culex quinquefasciatus larvae was completely different, and the median lethal dose (LD50) of AalDV-7 in A. albopictus which was 109.48 genome equivalents per ml (geq/ml) was 12 and 46 times lower than those in A. aegypti (1010.56 geq/ml) and C. quinquefasciatus (1011.15 geq/ml). Furthermore, the median lethal time (LT50) value in A. albopictus (7.72 days) was 25% and 26% shorter than those in A. aegypti (10.24 days) and C. quinquefasciatus (10.42 days) at a titer of 1011 geq/ml. Furthermore, the mortality of AalDV-7-infected mosquitoes increased in a dose-dependent manner, and the highest mortality was found in A. albopictus larvae exposed to 1011 geq/ml AalDV-7 (82.00%). Sublethal effects analysis also showed that AalDV-7 infection significantly decreased pupation and emergence rates. The 1st–2nd instar larvae of all three mosquito species showed a near 100% infection rate, and the highest relative vial titer (305.97 ± 67.57 geq/ng) was observed in the 1st–2nd instar larvae of C. quinquefasciatus. These pathogenic characteristics make AalDV-7 a potential MBVDs control agent in China, whereas its negligible pathogenicity and high infection rate and viral dose in vivo make it a good candidate for gene delivery vectors in C. quinquefasciatus gene function analysis. In conclusion, the continuous discovery and isolation of new MDVs enrich the pool of mosquito entomopathogenic viruses and provide a variety of choices for optimal MDVs or combinations of MDVs to target certain mosquitoes.
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Affiliation(s)
- Jing Li
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yunqiao Dong
- Reproductive Medical Centre of Guangdong Women and Children's Hospital, Guangzhou, China
| | - Yan Sun
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Zetian Lai
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yijie Zhao
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Peiwen Liu
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yonghui Gao
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xiaoguang Chen
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
| | - Jinbao Gu
- Guangdong Provincial Key Laboratory of Tropical Disease Research, Department of Pathogen Biology, School of Public Health, Southern Medical University, Guangzhou, China
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15
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Miao M, Yu F, Wang D, Tong Y, Yang L, Xu J, Qiu Y, Zhou X, Zhao X. Proteomics Profiling of Host Cell Response via Protein Expression and Phosphorylation upon Dengue Virus Infection. Virol Sin 2019; 34:549-562. [PMID: 31134586 DOI: 10.1007/s12250-019-00131-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 04/08/2019] [Indexed: 12/26/2022] Open
Abstract
Dengue virus (DENV) infection is a worldwide public health threat. To date, the knowledge about the pathogenesis and progression of DENV infection is still limited. Combining global profiling based on proteomic analysis together with functional verification analysis is a powerful strategy to investigate the interplay between the virus and host cells. In the present study, quantitative proteomics has been applied to evaluate host responses (as indicated by altered proteins and modifications) in human cells (using K562 cell line) upon DENV-2 infection, as DENV-2 spreads most widely among all DENV serotypes. Comparative analysis was performed to define differentially expressed proteins in the infected cells compared to the mock-control, and it revealed critical pathogen-induced changes covering a broad spectrum of host cellular compartments and processes. We also discovered more dramatic changes (> 20%, 160 regulated phosphoproteins) in protein phosphorylation compared to protein expression (14%, 321 regulated proteins). Most of these proteins/phosphoproteins were involved in transcription regulation, RNA splicing and processing, immune system, cellular response to stimulus, and macromolecule biosynthesis. Western blot analysis was also performed to confirm the proteomic data. Potential roles of these altered proteins were discussed. The present study provides valuable large-scale protein-related information for elucidating the functional emphasis of host cell proteins and their post-translational modifications in virus infection, and also provides insight and protein evidence for understanding the general pathogenesis and pathology of DENV.
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Affiliation(s)
- Meng Miao
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Fei Yu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.,Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Danya Wang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.,Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Yongjia Tong
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.,Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Liuting Yang
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.,Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jiuyue Xu
- Laboratory of RNA Virology, Wuhan Institute of Virology, Chinese Academy of Science, Wuhan, 430071, China
| | - Yang Qiu
- Laboratory of RNA Virology, Wuhan Institute of Virology, Chinese Academy of Science, Wuhan, 430071, China
| | - Xi Zhou
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China. .,Laboratory of RNA Virology, Wuhan Institute of Virology, Chinese Academy of Science, Wuhan, 430071, China.
| | - Xiaolu Zhao
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China. .,Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China.
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16
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McKenzie BA, Wilson AE, Zohdy S. Aedes albopictus is a competent vector of Zika virus: A meta-analysis. PLoS One 2019; 14:e0216794. [PMID: 31112569 PMCID: PMC6528984 DOI: 10.1371/journal.pone.0216794] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 04/29/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Much work has been done in recent years to determine the vector competence of Aedes albopictus (Skuse) for Zika virus (ZIKV). If competent, Ae. albopictus could become an important vector in the spread of ZIKV to areas which until now have been considered safe from the virus. Despite much speculation about Ae. albopictus' competence for ZIKV, there have been, to date, no quantitative syntheses of Ae. albopictus' competence, nor have the potentially confounding differences between studies been addressed. METHODOLOGY/ PRINCIPLE FINDINGS This study represents a quantitative meta-analysis of the literature surrounding this topic by examining infection rates (IR) and transmission rates (TR) among sample populations of Ae. albopictus at 7 and 14 days post infection (dpi) across 15 journal articles comprising 23 studies. Our analyses examined potentially confounding variables in the studies contained therein, including: geographic origin of viral strain or mosquito population tested, whether sympatry of the tested viral strain and mosquito population was important, and freshness of blood meal. Our results suggest 1) Ae albopictus is a competent vector for ZIKV and 2) that origin of Ae. albopictus population and origin of viral strain had significant effects on the competence of Ae. albopictus to transmit ZIKV. CONCLUSIONS/ SIGNIFICANCE These results indicate a need to further explore the effects of methodology on vector competence studies and to examine in more detail the geographic variation in the competence of Ae. albopictus for ZIKV as well as the underlying causes of said variation. The ability of Ae. albopictus to carry and transmit ZIKV also points to a need to create new vector control strategies in case of a ZIKV outbreak in an area where Ae. albopictus is prominent. Finally, this study represents a potential template for future meta-analyses in the field of vector competence, where this type of study has been under-utilized despite the abundance of relevant studies.
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Affiliation(s)
- Benjamin A. McKenzie
- School of Forestry and Wildlife Sciences, Auburn University, Auburn, Alabama, United States of America
- * E-mail: (BM); (SZ)
| | - Alan E. Wilson
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, Alabama, United States of America
| | - Sarah Zohdy
- School of Forestry and Wildlife Sciences, Auburn University, Auburn, Alabama, United States of America
- College of Veterinary Medicine, Auburn University, Auburn, Alabama, United States of America
- * E-mail: (BM); (SZ)
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17
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Zhou X, Yang C, Liu N, Li M, Tong Y, Zeng X, Qiu X. Knockdown resistance (kdr) mutations within seventeen field populations of Aedes albopictus from Beijing China: first report of a novel V1016G mutation and evolutionary origins of kdr haplotypes. Parasit Vectors 2019; 12:180. [PMID: 31014392 PMCID: PMC6480817 DOI: 10.1186/s13071-019-3423-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 03/29/2019] [Indexed: 12/19/2022] Open
Abstract
Background Aedes albopictus (Skuse) is an important vector of chikungunya, dengue, yellow fever and Zika viruses. In the absence of anti-viral medication and with limited availability of a commercial vaccine for public health use, vector control remains an effective means for reducing Aedes-borne disease morbidity. Knowledge about genetic mutations associated with insecticide resistance (IR) is a prerequisite for developing rapid resistance diagnosis, and the distribution and frequency of IR conferring mutations is important information for making smart vector control decisions. Methods Partial DNA sequences of domain II and domain III of Ae. albopictus voltage gated sodium channel (VGSC) gene were amplified from a total of 426 individuals, collected from 17 sites in the Beijing municipality. These DNA fragments were sequenced to discover the possible genetic mutations mediating knockdown resistance (kdr) to pyrethroids. The frequency and distribution of kdr mutations were assessed in the 17 Ae. albopictus populations. The origin of kdr mutations was investigated by haplotype clarification and phylogenetic analysis. Results Sequence alignments revealed the existence of multiple mutations (V1016G, I1532T, F1534S and F1534L) in VGSC. The highest frequency of the mutant 1016G allele (0.647) was found in Haidian, while 1016G was not detected in Huai Rou, Yan Qing, Ping Gu and Shun Yi. The frequency of 1532T was highest (0.537) in the population from the Olympic Forest Park (OFP, Chao Yang District), but not detectable in Huai Rou and Mi Yun. Two mutations were observed at codon 1534 with different distribution patterns: 1534L was only found in Tong Zhou (TZ) with a frequency of 0.017, while 1534S was distributed in TZ, OFP, Fang Shan, Da Xing and Shi Jing Shan with frequencies ranging from 0.019 (OFP) to 0.276 (TZ). One 1016G, one 1532T, one 1534L and two 1534S haplotypes were identified. Conclusions Multiple mutations (V1016G, I1532T, F1534L/S) in VGSC were found in Ae. albopictus in Beijing. This represents the first report of V1016G in Ae. albopictus. Sequence alignment and phylogenetic analysis revealed multiple origins of 1534S. The spatial heterogeneity in distribution and frequency of kdr mutations calls for a site-specific strategy for the monitoring of insecticide resistance. The relatively high frequencies of V1016G warn of a risk of pyrethroid resistance in mosquitoes in the urban zones.
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Affiliation(s)
- Xiaojie Zhou
- Beijing Research Center for Preventive Medicine, Beijing Center for Disease Control and Prevention, Beijing, 100013, China.,State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Chan Yang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Nian Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.,Institute of Physical Science and Information Technology, Anhui University, Anhui, 230039, China
| | - Mei Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ying Tong
- Beijing Research Center for Preventive Medicine, Beijing Center for Disease Control and Prevention, Beijing, 100013, China
| | - Xiaopeng Zeng
- Beijing Research Center for Preventive Medicine, Beijing Center for Disease Control and Prevention, Beijing, 100013, China.
| | - Xinghui Qiu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
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18
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Zou C, Huang C, Zhang J, Wu Q, Ni X, Sun J, Dai J. Virulence difference of five type I dengue viruses and the intrinsic molecular mechanism. PLoS Negl Trop Dis 2019; 13:e0007202. [PMID: 30830907 PMCID: PMC6417740 DOI: 10.1371/journal.pntd.0007202] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 03/14/2019] [Accepted: 01/30/2019] [Indexed: 12/23/2022] Open
Abstract
Dengue virus (DENV) is the most important vector-borne virus globally. The safe and effective vaccines are still under development and there are no antiviral drugs for DENV induced diseases. In this study, we obtained five DENV1 isolates (DENV1 A to E) from the outbreak of dengue fever in 2014 of Guangzhou, China, and analyzed their replication efficiency and virulence in vitro and in vivo. The results suggested that among the five DENV1 strains, DENV1 B has the highest replication efficiency in both human and mosquito cells in vitro, also causes the highest mortality to suckling mice. Further study suggested that nonstructural proteins from DENV1B have higher capacity to suppress host interferon signaling. In addition, the NS2B3 protease from DENV1B has higher enzymatic activity compared with that from DENV1 E. Finally, we identified that the 64th amino acid of NS2A and the 55th amino acid of NS2B were two virulence determining sites for DENV1. This study provided new evidences of the molecular mechanisms of DENV virulence. Dengue is the most important vector-borne viral infection that endangers an estimated 2.5 billion people globally. The recently licensed dengue vaccine has major weaknesses and there are no antiviral drugs for the treatment of dengue related diseases. Identifying the virulence determinants is important for understanding the molecule bases of viral life cycle, also contributing to vaccine design and development. In this study, we analyzed the virulence differences among five DENV1 strains that obtained from the 2014 DENV outbreak in Guangzhou, China, and identified two novel virulence determining sites for DENV1. This study provides new ideas for investigation of DENV protein function, pathogenic mechanism and novel attenuated vaccine.
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Affiliation(s)
- Chunling Zou
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, P. R. China
| | - Chenxiao Huang
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, P. R. China
| | - Jinyu Zhang
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, P. R. China
| | - Qihan Wu
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, P.R. China
| | - Xiaohua Ni
- NHC Key Lab of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Shanghai, P.R. China
- * E-mail: (XN) ; (JS) ; (JD)
| | - Jiufeng Sun
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, P.R. China
- * E-mail: (XN) ; (JS) ; (JD)
| | - Jianfeng Dai
- Institutes of Biology and Medical Sciences, Jiangsu Key Laboratory of Infection and Immunity, Soochow University, Suzhou, P. R. China
- * E-mail: (XN) ; (JS) ; (JD)
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19
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Gao X, Wen Y, Wang J, Hong W, Li C, Zhao L, Yin C, Jin X, Zhang F, Yu L. Delayed and highly specific antibody response to nonstructural protein 1 (NS1) revealed during natural human ZIKV infection by NS1-based capture ELISA. BMC Infect Dis 2018; 18:275. [PMID: 29898684 PMCID: PMC6000977 DOI: 10.1186/s12879-018-3173-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 05/30/2018] [Indexed: 01/22/2023] Open
Abstract
Background Zika virus (ZIKV) had spread rapidly in the past few years in southern hemisphere where dengue virus (DENV) had caused epidemic problems for over half a century. The high degree of cross-reactivity of Envelope (E) protein specific antibody responses between ZIKV and DENV made it challenging to perform differential diagnosis between the two infections using standard ELISA method for E protein. Methods Using an IgG capture ELISA, we investigated the kinetics of nonstructural protein 1 (NS1) antibody response during natural ZIKV infection and the cross-reactivity to NS1 proteins using convalescent sera obtained from patients infected by either DENV or ZIKV. Results The analyses of the sequential serum samples from ZIKV infected individuals showed NS1 specific Abs appeared 2 weeks later than E specific Abs. Notably, human sera from ZIKV infected individuals did not contain cross-reactivity to NS1 proteins of any of the four DENV serotypes. Furthermore, four out of five NS1-specific monoclonal antibodies (mAbs) isolated from ZIKV infected individuals did not bind to DENV NS1 proteins. Only limited amount of cross-reactivity to ZIKV NS1 was displayed in 108 DENV1 immune sera at 1:100 dilution. Conclusions The high degree of NS1-specific Abs in both ZIKV and DENV infection revealed here suggest that NS1-based diagnostics would significantly improve the differential diagnosis between DENV and ZIKV infections. Electronic supplementary material The online version of this article (10.1186/s12879-018-3173-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiujie Gao
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Yingfen Wen
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Jian Wang
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Wenxin Hong
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Chunlin Li
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Lingzhai Zhao
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Chibiao Yin
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China
| | - Xia Jin
- Viral Disease and Vaccine Translational Research Unit, CAS Key Lab of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences (CAS), Shanghai, 200025, China
| | - Fuchun Zhang
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China.
| | - Lei Yu
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, 627 Dongfeng Rd. East, Guangzhou, 510060, China.
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20
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Liu K, Zhu Y, Xia Y, Zhang Y, Huang X, Huang J, Nie E, Jing Q, Wang G, Yang Z, Hu W, Lu J. Dynamic spatiotemporal analysis of indigenous dengue fever at street-level in Guangzhou city, China. PLoS Negl Trop Dis 2018; 12:e0006318. [PMID: 29561835 PMCID: PMC5880401 DOI: 10.1371/journal.pntd.0006318] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 04/02/2018] [Accepted: 02/15/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND This study aimed to investigate the spatiotemporal clustering and socio-environmental factors associated with dengue fever (DF) incidence rates at street level in Guangzhou city, China. METHODS Spatiotemporal scan technique was applied to identify the high risk region of DF. Multiple regression model was used to identify the socio-environmental factors associated with DF infection. A Poisson regression model was employed to examine the spatiotemporal patterns in the spread of DF. RESULTS Spatial clusters of DF were primarily concentrated at the southwest part of Guangzhou city. Age group (65+ years) (Odd Ratio (OR) = 1.49, 95% Confidence Interval (CI) = 1.13 to 2.03), floating population (OR = 1.09, 95% CI = 1.05 to 1.15), low-education (OR = 1.08, 95% CI = 1.01 to 1.16) and non-agriculture (OR = 1.07, 95% CI = 1.03 to 1.11) were associated with DF transmission. Poisson regression results indicated that changes in DF incidence rates were significantly associated with longitude (β = -5.08, P<0.01) and latitude (β = -1.99, P<0.01). CONCLUSIONS The study demonstrated that social-environmental factors may play an important role in DF transmission in Guangzhou. As geographic range of notified DF has significantly expanded over recent years, an early warning systems based on spatiotemporal model with socio-environmental is urgently needed to improve the effectiveness and efficiency of dengue control and prevention.
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Affiliation(s)
- Kangkang Liu
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
- School of Public Health and Social Work, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Yanshan Zhu
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yao Xia
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Yingtao Zhang
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Xiaodong Huang
- School of Public Health and Social Work, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Jiawei Huang
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Enqiong Nie
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Qinlong Jing
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Guangzhou Center for Diseases Control and Prevention, Guangzhou, Guangdong, China
| | - Guoling Wang
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
- Department of Integrated Control and Prevention Management, Haizhu District Center for Diseases Control and Prevention, Guangzhou, Guangdong, China
| | - Zhicong Yang
- Guangzhou Center for Diseases Control and Prevention, Guangzhou, Guangdong, China
| | - Wenbiao Hu
- School of Public Health and Social Work, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Jiahai Lu
- School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China
- School of Public Health and Social Work, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
- One Health Research Centre (School of Public Health), Sun Yat-Sen University, Guangzhou, Guangdong, China
- Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, Guangdong, China
- Key Surveillance Laboratory of Vector-borne Infectious Diseases, Haikou, Hainan, China
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21
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Liu Z, Zhang Z, Lai Z, Zhou T, Jia Z, Gu J, Wu K, Chen XG. Temperature Increase Enhances Aedes albopictus Competence to Transmit Dengue Virus. Front Microbiol 2017; 8:2337. [PMID: 29250045 PMCID: PMC5717519 DOI: 10.3389/fmicb.2017.02337] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 11/13/2017] [Indexed: 01/20/2023] Open
Abstract
Dengue is a mosquito-borne disease that has been an epidemic in China for many years. Aedes albopictus is the dominant Aedes mosquito species and the main vector of dengue in China. Epidemiologically, dengue mainly occurs in Guangdong Province; it does not occur or rarely occurs in other areas of mainland China. This distribution may be associated with climate, mosquito density, and other factors in different regions; however, the effect of temperature on the vector competence of Ae. albopictus for dengue viruses (DENV) remains unclear. In this study, Ae. albopictus was orally infected with dengue virus 2 (DENV-2) and reared at constant temperatures (18, 23, 28, and 32°C) and a fluctuating temperature (28-23-18°C). The infection status of the midguts, ovaries, and salivary glands of each mosquito was detected by polymerase chain reaction (PCR) at 0, 5, 10, and 15 days post-infection (dpi). DENV-2 RNA copies from positive tissues were quantified by quantitative real time PCR (qRT-PCR). At 18°C, DENV-2 proliferated slowly in the midgut of Ae. albopictus, and the virus could not spread to the salivary glands. At 23 and 28°C, DENV-2 was detected in the ovaries and salivary glands at 10 dpi. The rates of infection, dissemination, population transmission, and DENV-2 copies at 28°C were higher than those at 23°C at any time point. At 32°C, the extrinsic incubation period (EIP) for DENV-2 in Ae. albopictus was only 5 dpi, and the vector competence was the highest among all the temperatures. Compared with 28°C, at 28-23-18°C, the positive rate and the amount of DENV-2 in the salivary glands were significantly lower. Therefore, temperature is an important factor affecting the vector competence of Ae. albopictus for DENV-2. Within the suitable temperature range, the replication of DENV-2 in Ae. albopictus accelerated, and the EIP was shorter with a higher temperature. Our results provide a guide for vector control and an experimental basis for differences in the spatial distribution of dengue cases.
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Affiliation(s)
- Zhuanzhuan Liu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Zhenhong Zhang
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Zetian Lai
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Tengfei Zhou
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Zhirong Jia
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Jinbao Gu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Kun Wu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xiao-Guang Chen
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
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22
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Liu Z, Zhou T, Lai Z, Zhang Z, Jia Z, Zhou G, Williams T, Xu J, Gu J, Zhou X, Lin L, Yan G, Chen XG. Competence of Aedes aegypti, Ae. albopictus, and Culex quinquefasciatus Mosquitoes as Zika Virus Vectors, China. Emerg Infect Dis 2017; 23:1085-1091. [PMID: 28430562 PMCID: PMC5512498 DOI: 10.3201/eid2307.161528] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In China, the prevention and control of Zika virus disease has been a public health threat since the first imported case was reported in February 2016. To determine the vector competence of potential vector mosquito species, we experimentally infected Aedes aegypti, Ae. albopictus, and Culex quinquefasciatus mosquitoes and determined infection rates, dissemination rates, and transmission rates. We found the highest vector competence for the imported Zika virus in Ae. aegypti mosquitoes, some susceptibility of Ae. albopictus mosquitoes, but no transmission ability for Cx. quinquefasciatus mosquitoes. Considering that, in China, Ae. albopictus mosquitoes are widely distributed but Ae. aegypti mosquito distribution is limited, Ae. albopictus mosquitoes are a potential primary vector for Zika virus and should be targeted in vector control strategies.
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23
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Zheng X, Chen H, Wang R, Fan D, Feng K, Gao N, An J. Effective Protection Induced by a Monovalent DNA Vaccine against Dengue Virus (DV) Serotype 1 and a Bivalent DNA Vaccine against DV1 and DV2 in Mice. Front Cell Infect Microbiol 2017; 7:175. [PMID: 28553618 PMCID: PMC5427067 DOI: 10.3389/fcimb.2017.00175] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Accepted: 04/24/2017] [Indexed: 01/19/2023] Open
Abstract
Dengue virus (DV) is the causal pathogen of dengue fever, which is one of the most rapidly spread mosquito-borne disease worldwide and has become a severe public health problem. Currently, there is no specific treatment for dengue; thus, a vaccine would be an effective countermeasure to reduce the morbidity and mortality. Although, the chimeric Yellow fever dengue tetravalent vaccine has been approved in some countries, it is still necessary to develop safer, more effective, and less costly vaccines. In this study, a DNA vaccine candidate pVAX1-D1ME expressing the prME protein of DV1 was inoculated in BALB/c mice via intramuscular injection or electroporation, and the immunogenicity and protection were evaluated. Compared with traditional intramuscular injection, administration with 50 μg pVAX1-D1ME via electroporation with three immunizations induced persistent humoral and cellular immune responses and effectively protected mice against lethal DV1 challenge. In addition, immunization with a bivalent vaccine consisting of pVAX1-D1ME and pVAX1-D2ME via electroporation generated a balanced IgG response and neutralizing antibodies against DV1 and DV2 and could protect mice from lethal challenge with DV1 and DV2. This study sheds new light on developing a dengue tetravalent DNA vaccine.
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Affiliation(s)
- Xiaoyan Zheng
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China.,Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical UniversityBeijing, China
| | - Hui Chen
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Ran Wang
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Dongying Fan
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Kaihao Feng
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Na Gao
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China
| | - Jing An
- Department of Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical UniversityBeijing, China.,Center of Epilepsy, Beijing Institute for Brain DisordersBeijing, China
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24
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Li G, Pan P, He Q, Kong X, Wu K, Zhang W, Liu Y, Huang H, Liu J, Zhang Z, Wu D, Lai X, Liu X, Wu J. Molecular epidemiology demonstrates that imported and local strains circulated during the 2014 dengue outbreak in Guangzhou, China. Virol Sin 2017; 32:63-72. [PMID: 28120220 PMCID: PMC6702253 DOI: 10.1007/s12250-016-3872-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 11/15/2016] [Indexed: 11/28/2022] Open
Abstract
The dengue virus (DENV) is a vital global public health issue. The 2014 dengue
epidemic in Guangzhou, China, caused approximately 40,000 cases of infection and
five deaths. We carried out a comprehensive investigation aimed at identifying the
transmission sources in this dengue epidemic. To analyze the phylogenetics of the
2014 dengue strains, the envelope (E) gene
sequences from 17 viral strains isolated from 168 dengue patient serum samples were
sequenced and a phylogenetic tree was reconstructed. All 17 strains were serotype I
strains, including 8 genotype I and 9 genotype V strains. Additionally, 6 genotype I
strains that were probably introduced to China from Thailand before 2009 were widely
transmitted in the 2013 and 2014 epidemics, and they continued to circulate until
2015, with one affinis strain being found in Singapore. The other 2 genotype I
strains were introduced from the Malaya Peninsula in 2014. The transmission source
of the 9 genotype V strains was from Malaysia in 2014. DENVs of different serotypes
and genotypes co-circulated in the 2014 dengue outbreak in Guangzhou. Moreover, not
only had DENV been imported to Guangzhou, but it had also been gradually exported,
as the viruses exhibited an enzootic transmission cycle in Guangzhou. ![]()
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Affiliation(s)
- Geng Li
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.,State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Pan Pan
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Qiuyan He
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Xiujuan Kong
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Kailang Wu
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Wei Zhang
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.,State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Yuntao Liu
- Guangdong Province Traditional Chinese Medical Hospital, Guangzhou, 510120, China
| | - Huiting Huang
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Jianbo Liu
- The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Zhongde Zhang
- Guangdong Province Traditional Chinese Medical Hospital, Guangzhou, 510120, China
| | - De Wu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, 511430, China
| | - Xiaoping Lai
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Xiaohong Liu
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China.,The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Jianguo Wu
- School of Chinese Meterla Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China. .,State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, 430072, China.
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