Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases.
House Index, Container Index, and Breteau Index are the most commonly used indices for dengue vector surveillance. However, these larval indices are a poor proxy for measuring the adult population-which is responsible for disease transmission. Information on the adult distribution and density are im...
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ftdoajarticles:oai:doaj.org/article:808cff7827c64b76a6cbf35cde40cb3a 2023-05-15T15:16:25+02:00 Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. Janet Ong Chee-Seng Chong Grace Yap Caleb Lee Muhammad Aliff Abdul Razak Suzanna Chiang Lee-Ching Ng 2020-08-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0008528 https://doaj.org/article/808cff7827c64b76a6cbf35cde40cb3a EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pntd.0008528 https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0008528 https://doaj.org/article/808cff7827c64b76a6cbf35cde40cb3a PLoS Neglected Tropical Diseases, Vol 14, Iss 8, p e0008528 (2020) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2020 ftdoajarticles https://doi.org/10.1371/journal.pntd.0008528 2022-12-31T10:07:33Z House Index, Container Index, and Breteau Index are the most commonly used indices for dengue vector surveillance. However, these larval indices are a poor proxy for measuring the adult population-which is responsible for disease transmission. Information on the adult distribution and density are important for assessing transmission risk as well as for developing effective control strategies. This study introduces a new entomological index, Gravitrap aegypti index (GAI), which estimates the adult female Aedes aegypti population in the community and presents its association with dengue cases. Gravitraps were deployed across 34 treatment sites in Singapore from September 2013 to September 2016. The GAI, derived from the Gravitrap surveillance data, was analysed to investigate the spatio-temporal patterns of the Ae. aegypti population in Singapore. The index was further categorised into low, moderate, and high-risk groups and its association with dengue cases were examined. A Before-After Control Impact analysis was performed to evaluate the epidemiology impact of Gravitrap system on dengue transmission. The Ae. aegypti population exhibits a seasonal pattern, and spatial heterogeneity in Ae. aegypti abundance was observed among treatment sites. The Ae. aegypti population was also found to be unevenly distributed among floors of an apartment block, with low floors (floors 1-4) having a higher abundance of mosquitoes trapped than mid (floors 5-8) and high (floors ≥9) floors. Areas with high GAI were shown to have higher dengue case count. Gravitrap has also demonstrated to be a good dengue control tool. The contribution of cases by treatment sites to the national numbers was lower after Gravitraps deployment. The GAI, which is of better relevance to dengue transmission risk, could be recommended as an indicator for decision making in vector control efforts, and to monitor the spatio-temporal variability of the adult Aedes population in the country. In addition, findings from this study indicate that Gravitraps can be ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic PLOS Neglected Tropical Diseases 14 8 e0008528 |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
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Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Janet Ong Chee-Seng Chong Grace Yap Caleb Lee Muhammad Aliff Abdul Razak Suzanna Chiang Lee-Ching Ng Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
House Index, Container Index, and Breteau Index are the most commonly used indices for dengue vector surveillance. However, these larval indices are a poor proxy for measuring the adult population-which is responsible for disease transmission. Information on the adult distribution and density are important for assessing transmission risk as well as for developing effective control strategies. This study introduces a new entomological index, Gravitrap aegypti index (GAI), which estimates the adult female Aedes aegypti population in the community and presents its association with dengue cases. Gravitraps were deployed across 34 treatment sites in Singapore from September 2013 to September 2016. The GAI, derived from the Gravitrap surveillance data, was analysed to investigate the spatio-temporal patterns of the Ae. aegypti population in Singapore. The index was further categorised into low, moderate, and high-risk groups and its association with dengue cases were examined. A Before-After Control Impact analysis was performed to evaluate the epidemiology impact of Gravitrap system on dengue transmission. The Ae. aegypti population exhibits a seasonal pattern, and spatial heterogeneity in Ae. aegypti abundance was observed among treatment sites. The Ae. aegypti population was also found to be unevenly distributed among floors of an apartment block, with low floors (floors 1-4) having a higher abundance of mosquitoes trapped than mid (floors 5-8) and high (floors ≥9) floors. Areas with high GAI were shown to have higher dengue case count. Gravitrap has also demonstrated to be a good dengue control tool. The contribution of cases by treatment sites to the national numbers was lower after Gravitraps deployment. The GAI, which is of better relevance to dengue transmission risk, could be recommended as an indicator for decision making in vector control efforts, and to monitor the spatio-temporal variability of the adult Aedes population in the country. In addition, findings from this study indicate that Gravitraps can be ... |
format |
Article in Journal/Newspaper |
author |
Janet Ong Chee-Seng Chong Grace Yap Caleb Lee Muhammad Aliff Abdul Razak Suzanna Chiang Lee-Ching Ng |
author_facet |
Janet Ong Chee-Seng Chong Grace Yap Caleb Lee Muhammad Aliff Abdul Razak Suzanna Chiang Lee-Ching Ng |
author_sort |
Janet Ong |
title |
Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
title_short |
Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
title_full |
Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
title_fullStr |
Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
title_full_unstemmed |
Gravitrap deployment for adult Aedes aegypti surveillance and its impact on dengue cases. |
title_sort |
gravitrap deployment for adult aedes aegypti surveillance and its impact on dengue cases. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2020 |
url |
https://doi.org/10.1371/journal.pntd.0008528 https://doaj.org/article/808cff7827c64b76a6cbf35cde40cb3a |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 14, Iss 8, p e0008528 (2020) |
op_relation |
https://doi.org/10.1371/journal.pntd.0008528 https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0008528 https://doaj.org/article/808cff7827c64b76a6cbf35cde40cb3a |
op_doi |
https://doi.org/10.1371/journal.pntd.0008528 |
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PLOS Neglected Tropical Diseases |
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14 |
container_issue |
8 |
container_start_page |
e0008528 |
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