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Short Report: Adult Aedes abundance and risk of dengue transmission

Dengue is transmitted mainly by the adult female Aedes aegypti mosquito. However, little is known about the impact of adult Aedes abundance on the risk of dengue transmission. Here we analysed nationally representative dengue case and vector surveillance data collected from Singapore, to determine t...

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Autores principales: Ong, Janet, Aik, Joel, Ng, Lee Ching
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8205144/
https://www.ncbi.nlm.nih.gov/pubmed/34081695
http://dx.doi.org/10.1371/journal.pntd.0009475
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author Ong, Janet
Aik, Joel
Ng, Lee Ching
author_facet Ong, Janet
Aik, Joel
Ng, Lee Ching
author_sort Ong, Janet
collection PubMed
description Dengue is transmitted mainly by the adult female Aedes aegypti mosquito. However, little is known about the impact of adult Aedes abundance on the risk of dengue transmission. Here we analysed nationally representative dengue case and vector surveillance data collected from Singapore, to determine the effect of adult Aedes abundance on the risk of dengue transmission. A case was an area with active dengue transmission as indicated by the presence of dengue cluster. A control was an area where no dengue cluster was reported. Using multivariate logistic regression, we analysed 88 cases and 602 controls and estimated the odds of dengue cluster formation at various adult Aedes abundance levels, estimated by the mean number of adult female Aedes per Gravitrap per week and categorised into Low, Moderate, High and Very High abundance level. We found that the risk of dengue cluster formation was positively associated with adult Ae. aegypti abundance. We observed a three to four-fold increase in the odds of dengue clusters forming in areas with High (AOR: 3.40, 95% CI: 2.09, 5.52) and Very High (AOR: 3.99, 95% CI: 2.46, 6.46) adult Aedes aegypti abundance level compared to those with low Ae. aegypti abundance level. Our study strengthens the evidence for the use of adult Aedes indices for dengue risk assessment and early warning for dengue outbreaks. Entomological indicators of adult Ae. aegypti could be used to anticipate and prioritize areas for dengue control.
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spelling pubmed-82051442021-06-29 Short Report: Adult Aedes abundance and risk of dengue transmission Ong, Janet Aik, Joel Ng, Lee Ching PLoS Negl Trop Dis Research Article Dengue is transmitted mainly by the adult female Aedes aegypti mosquito. However, little is known about the impact of adult Aedes abundance on the risk of dengue transmission. Here we analysed nationally representative dengue case and vector surveillance data collected from Singapore, to determine the effect of adult Aedes abundance on the risk of dengue transmission. A case was an area with active dengue transmission as indicated by the presence of dengue cluster. A control was an area where no dengue cluster was reported. Using multivariate logistic regression, we analysed 88 cases and 602 controls and estimated the odds of dengue cluster formation at various adult Aedes abundance levels, estimated by the mean number of adult female Aedes per Gravitrap per week and categorised into Low, Moderate, High and Very High abundance level. We found that the risk of dengue cluster formation was positively associated with adult Ae. aegypti abundance. We observed a three to four-fold increase in the odds of dengue clusters forming in areas with High (AOR: 3.40, 95% CI: 2.09, 5.52) and Very High (AOR: 3.99, 95% CI: 2.46, 6.46) adult Aedes aegypti abundance level compared to those with low Ae. aegypti abundance level. Our study strengthens the evidence for the use of adult Aedes indices for dengue risk assessment and early warning for dengue outbreaks. Entomological indicators of adult Ae. aegypti could be used to anticipate and prioritize areas for dengue control. Public Library of Science 2021-06-03 /pmc/articles/PMC8205144/ /pubmed/34081695 http://dx.doi.org/10.1371/journal.pntd.0009475 Text en © 2021 Ong et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Ong, Janet
Aik, Joel
Ng, Lee Ching
Short Report: Adult Aedes abundance and risk of dengue transmission
title Short Report: Adult Aedes abundance and risk of dengue transmission
title_full Short Report: Adult Aedes abundance and risk of dengue transmission
title_fullStr Short Report: Adult Aedes abundance and risk of dengue transmission
title_full_unstemmed Short Report: Adult Aedes abundance and risk of dengue transmission
title_short Short Report: Adult Aedes abundance and risk of dengue transmission
title_sort short report: adult aedes abundance and risk of dengue transmission
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8205144/
https://www.ncbi.nlm.nih.gov/pubmed/34081695
http://dx.doi.org/10.1371/journal.pntd.0009475
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