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Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions

Contrary to expectation, dengue incidence decreased in many countries during the period when stringent population movement restrictions were imposed to combat COVID-19. Using a seasonal autoregressive integrated moving average model, we previously reported a 74% reduction in the predicted number of...

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Autores principales: Surendran, Sinnathamby Noble, Nagulan, Ratnarajah, Tharsan, Annathurai, Sivabalakrishnan, Kokila, Ramasamy, Ranjan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9612376/
https://www.ncbi.nlm.nih.gov/pubmed/36288027
http://dx.doi.org/10.3390/tropicalmed7100287
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author Surendran, Sinnathamby Noble
Nagulan, Ratnarajah
Tharsan, Annathurai
Sivabalakrishnan, Kokila
Ramasamy, Ranjan
author_facet Surendran, Sinnathamby Noble
Nagulan, Ratnarajah
Tharsan, Annathurai
Sivabalakrishnan, Kokila
Ramasamy, Ranjan
author_sort Surendran, Sinnathamby Noble
collection PubMed
description Contrary to expectation, dengue incidence decreased in many countries during the period when stringent population movement restrictions were imposed to combat COVID-19. Using a seasonal autoregressive integrated moving average model, we previously reported a 74% reduction in the predicted number of dengue cases from March 2020 to April 2021 in the whole of Sri Lanka, with reductions occurring in all 25 districts in the country. The reduction in dengue incidence was accompanied by an 87% reduction in larval collections of Aedes vectors in the northern city of Jaffna. It was proposed that movement restrictions led to reduced human contact and blood feeding by Aedes vectors, accompanied by decreased oviposition and vector densities, which were responsible for diminished dengue transmission. These findings are extended in the present study by investigating the relationship between dengue incidence, population movement restrictions, and vector larval collections between May 2021 and July 2022, when movement restrictions began to be lifted, with their complete removal in November 2021. The new findings further support our previous proposal that population movement restrictions imposed during the COVID-19 pandemic reduced dengue transmission primarily by influencing human–Aedes vector interaction dynamics.
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spelling pubmed-96123762022-10-28 Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions Surendran, Sinnathamby Noble Nagulan, Ratnarajah Tharsan, Annathurai Sivabalakrishnan, Kokila Ramasamy, Ranjan Trop Med Infect Dis Article Contrary to expectation, dengue incidence decreased in many countries during the period when stringent population movement restrictions were imposed to combat COVID-19. Using a seasonal autoregressive integrated moving average model, we previously reported a 74% reduction in the predicted number of dengue cases from March 2020 to April 2021 in the whole of Sri Lanka, with reductions occurring in all 25 districts in the country. The reduction in dengue incidence was accompanied by an 87% reduction in larval collections of Aedes vectors in the northern city of Jaffna. It was proposed that movement restrictions led to reduced human contact and blood feeding by Aedes vectors, accompanied by decreased oviposition and vector densities, which were responsible for diminished dengue transmission. These findings are extended in the present study by investigating the relationship between dengue incidence, population movement restrictions, and vector larval collections between May 2021 and July 2022, when movement restrictions began to be lifted, with their complete removal in November 2021. The new findings further support our previous proposal that population movement restrictions imposed during the COVID-19 pandemic reduced dengue transmission primarily by influencing human–Aedes vector interaction dynamics. MDPI 2022-10-07 /pmc/articles/PMC9612376/ /pubmed/36288027 http://dx.doi.org/10.3390/tropicalmed7100287 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Surendran, Sinnathamby Noble
Nagulan, Ratnarajah
Tharsan, Annathurai
Sivabalakrishnan, Kokila
Ramasamy, Ranjan
Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title_full Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title_fullStr Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title_full_unstemmed Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title_short Dengue Incidence and Aedes Vector Collections in Relation to COVID-19 Population Mobility Restrictions
title_sort dengue incidence and aedes vector collections in relation to covid-19 population mobility restrictions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9612376/
https://www.ncbi.nlm.nih.gov/pubmed/36288027
http://dx.doi.org/10.3390/tropicalmed7100287
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