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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Dengue vector dynamics (Aedes aegypti) influenced by climate and social factors in ecuador: Implications for targeted control
PLoS ONE, Volume 8, No. 11, Article e78263, Year 2013
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Description
Background: Dengue fever, a mosquito-borne viral disease, is now the fastest spreading tropical disease globally. Previous studies indicate that climate and human behavior interact to influence dengue virus and vector (Aedes aegypti ) population dynamics; however, the relative effects of these variables depends on local ecology and social context. We investigated the roles of climate and socio-ecological factors on Ae. aegypti population dynamics in Machala, a city in southern coastal Ecuador where dengue is hyper-endemic. Methods/Principal findings: We studied two proximate urban localities where we monitored weekly Ae. aegypti oviposition activity (Nov. 2010-June 2011), conducted seasonal pupal surveys, and surveyed household to identify dengue risk factors. The results of this study provide evidence that Ae. aegypti population dynamics are influenced by social risk factors that vary by season and lagged climate variables that vary by locality. Best-fit models to predict the presence of Ae. aegypti pupae included parameters for household water storage practices, access to piped water, the number of households per property, condition of the house and patio, and knowledge and perceptions of dengue. Rainfall and minimum temperature were significant predictors of oviposition activity, although the effect of rainfall varied by locality due to differences in types of water storage containers. Conclusions: These results indicate the potential to reduce the burden of dengue in this region by conducting focused vector control interventions that target high-risk households and containers in each season and by developing predictive models using climate and non-climate information. These findings provide the region's public health sector with key information for conducting time and location-specific vector control campaigns, and highlight the importance of local socio-ecological studies to understand dengue dynamics. See Text S1 for an executive summary in Spanish. © 2013 Stewart Ibarra et al.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s001.tif
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s002.tif
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s003.tif
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s004.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s005.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s006.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s007.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s008.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s009.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s010.doc
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s011.docx
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s012.docx
https://efashare.b-cdn.net/share/pmc/articles/PMC3855798/bin/pone.0078263.s013.docx
Authors & Co-Authors
Stewart-Ibarra, Anna M.
United States, Syracuse
Suny Upstate Medical University
United States, Syracuse
Suny College of Environmental Science and Forestry
Ecuador, Guayaquil
Ministry of Health
Ecuador, Guayaquil
National Institute of Meteorology and Hydrology
Ryan, Sadie J.
United States, Syracuse
Suny Upstate Medical University
United States, Syracuse
Suny College of Environmental Science and Forestry
South Africa, Durban
University of Kwazulu-natal
Beltrán, Efraín
Ecuador, Guayaquil
Ministry of Health
Mejía, Raúl
Ecuador, Guayaquil
National Institute of Meteorology and Hydrology
Silva, Mercy
Ecuador, Guayaquil
Ministry of Health
Muñoz, Ángel G.
United States, New York
Columbia University
Venezuela, Maracaibo
Universidad Del Zulia
Statistics
Citations: 180
Authors: 6
Affiliations: 7
Identifiers
Doi:
10.1371/journal.pone.0078263
e-ISSN:
19326203
Research Areas
Environmental
Health System And Policy
Infectious Diseases
Study Design
Cross Sectional Study