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Cui F, He F, Huang X, Tian L, Li S, Liang C, Zeng L, Lin H, Su J, Liu L, Zhao W, Sun L, Lin L, Sun J. Dengue and Dengue Virus in Guangdong, China, 1978-2017: Epidemiology, Seroprevalence, Evolution, and Policies. Front Med (Lausanne) 2022; 9:797674. [PMID: 35386910 PMCID: PMC8979027 DOI: 10.3389/fmed.2022.797674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/28/2022] [Indexed: 11/13/2022] Open
Abstract
Background Guangdong is a hyperepidemic area of dengue, which has over 0.72 million cumulative cases within the last four decades, accounting for more than 90% of cases in China. The local epidemic of dengue in Guangdong is suspected to be triggered by imported cases and results in consequent seasonal transmission. However, the comprehensive epidemiological characteristics of dengue in Guangdong are still unclear. Methods The epidemiology, seroprevalence, molecular evolution of dengue virus, and the development of policies and strategies on the prevention and control of dengue were analyzed in Guangdong, China from 1978 to 2017. Findings Seasonal transmission of dengue virus in Guangdong, China was mainly sustained from July to October of each year. August to September was the highest risk period of local dengue outbreaks. Most of the dengue cases in Guangdong were young and middle-aged adults. Five hundred and three fatal cases were recorded, which declined within the last two decades (n = 10). The serological test of healthy donors' serum samples showed a positive rate of 5.77%. Dengue virus 1-4 (DENV 1-4) was detected in Guangdong from 1978 to 2017. DENV 1 was the dominant serotype of dengue outbreaks from 1978 to 2017, with an increasing tendency of DENV 2 since 2010. Local outbreaks of DENV 3 were rare. DENV 4 was only encountered in imported cases in Guangdong, China. The imported cases were the main source of outbreaks of DENV 1-2. Early detection, management of dengue cases, and precise vector control were the key strategies for local dengue prevention and control in Guangdong, China. Interpretation Dengue has not become an endemic arboviral disease in Guangdong, China. Early detection, case management, and implementation of precise control strategies are key findings for preventing local dengue transmission, which may serve for countries still struggling to combat imported dengue in the west pacific areas.
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Affiliation(s)
- Fengfu Cui
- School of Public Health, Southern Medical University, Guangzhou, China.,Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Feiwu He
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaorong Huang
- School of Public Health, Southern Medical University, Guangzhou, China.,Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Lina Tian
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Saiqiang Li
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Chumin Liang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Lilian Zeng
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Huifang Lin
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Juan Su
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Liping Liu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Wei Zhao
- School of Public Health, Southern Medical University, Guangzhou, China
| | - Limei Sun
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Lifeng Lin
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Jiufeng Sun
- School of Public Health, Southern Medical University, Guangzhou, China.,Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China.,Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
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Rhodes CG, Scavo NA, Finney M, Fimbres-Macias JP, Lively MT, Strauss BH, Hamer GL. Meta-Analysis of the Relative Abundance of Nuisance and Vector Mosquitoes in Urban and Blue-Green Spaces. INSECTS 2022; 13:insects13030271. [PMID: 35323569 PMCID: PMC8951424 DOI: 10.3390/insects13030271] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/01/2022] [Accepted: 03/07/2022] [Indexed: 02/04/2023]
Abstract
Blue-green spaces (BGSs), urban areas characterized by the presence of vegetation and or water, and infrastructure form a potential solution for public health threats from increasing urbanization. We conducted a meta-analysis to test the hypothesis that blue-green spaces increase the abundance of nuisance and vector mosquito species compared to non-greened urban areas. After screening 7306 studies published since 1992, we identified 18 studies containing sufficient data from both traditional urban areas and BGSs. We found no significant difference in mean abundance of all mosquito taxa in three genera (Aedes, Culex, Anopheles) when comparing blue-green spaces and non-greened urban spaces. Similarly, a separate analysis of each individual genera found no significant differences. An analysis of the taxa by larval habitat guilds found no differences for container-breeding mosquitoes. Flood-water species tended to be more abundant in blue-green spaces, but the differences were not significant. The individual taxa of Aedes albopictus and the Culex pipiens complex showed no differences between blue-green and urban spaces, while the abundance of Aedes aegypti was significantly higher in traditional urban spaces. Due to the variety existing between and among the several types of blue-green spaces, further studies comparing each unique type of blue-green space or infrastructure will be necessary to draw conclusions regarding the influence of each structure on for urban mosquito communities.
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Affiliation(s)
- Charlotte G. Rhodes
- Entomology Department, Texas A&M University, College Station, TX 77843, USA; (M.F.); (B.H.S.)
- Correspondence: (C.G.R.); (N.A.S.); (G.L.H.)
| | - Nicole A. Scavo
- Ecology & Evolutionary Biology Program, Texas A&M University, College Station, TX 77843, USA
- Correspondence: (C.G.R.); (N.A.S.); (G.L.H.)
| | - Micaela Finney
- Entomology Department, Texas A&M University, College Station, TX 77843, USA; (M.F.); (B.H.S.)
| | - Juan P. Fimbres-Macias
- Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA;
| | - Macey T. Lively
- Epidemiology & Biostatistics Department, Texas A&M University, College Station, TX 77843, USA;
| | - Brandon H. Strauss
- Entomology Department, Texas A&M University, College Station, TX 77843, USA; (M.F.); (B.H.S.)
| | - Gabriel L. Hamer
- Entomology Department, Texas A&M University, College Station, TX 77843, USA; (M.F.); (B.H.S.)
- Correspondence: (C.G.R.); (N.A.S.); (G.L.H.)
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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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