Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence.
BACKGROUND:Despite doubts about methods used and the association between vector density and dengue transmission, routine sampling of mosquito vector populations is common in dengue-endemic countries worldwide. This study examined the evidence from published studies for the existence of any quantitat...
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ftdoajarticles:oai:doaj.org/article:ae1c7c019e684b569184fc17adb85396 2023-05-15T15:12:32+02:00 Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. Leigh R Bowman Silvia Runge-Ranzinger P J McCall 2014-05-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0002848 https://doaj.org/article/ae1c7c019e684b569184fc17adb85396 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4014441?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0002848 https://doaj.org/article/ae1c7c019e684b569184fc17adb85396 PLoS Neglected Tropical Diseases, Vol 8, Iss 5, p e2848 (2014) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2014 ftdoajarticles https://doi.org/10.1371/journal.pntd.0002848 2022-12-31T10:18:57Z BACKGROUND:Despite doubts about methods used and the association between vector density and dengue transmission, routine sampling of mosquito vector populations is common in dengue-endemic countries worldwide. This study examined the evidence from published studies for the existence of any quantitative relationship between vector indices and dengue cases. METHODOLOGY/PRINCIPAL FINDINGS:From a total of 1205 papers identified in database searches following Cochrane and PRISMA Group guidelines, 18 were included for review. Eligibility criteria included 3-month study duration and dengue case confirmation by WHO case definition and/or serology. A range of designs were seen, particularly in spatial sampling and analyses, and all but 3 were classed as weak study designs. Eleven of eighteen studies generated Stegomyia indices from combined larval and pupal data. Adult vector data were reported in only three studies. Of thirteen studies that investigated associations between vector indices and dengue cases, 4 reported positive correlations, 4 found no correlation and 5 reported ambiguous or inconclusive associations. Six out of 7 studies that measured Breteau Indices reported dengue transmission at levels below the currently accepted threshold of 5. CONCLUSIONS/SIGNIFICANCE:There was little evidence of quantifiable associations between vector indices and dengue transmission that could reliably be used for outbreak prediction. This review highlighted the need for standardized sampling protocols that adequately consider dengue spatial heterogeneity. Recommendations for more appropriately designed studies include: standardized study design to elucidate the relationship between vector abundance and dengue transmission; adult mosquito sampling should be routine; single values of Breteau or other indices are not reliable universal dengue transmission thresholds; better knowledge of vector ecology is required. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Prisma ENVELOPE(-58.767,-58.767,-69.200,-69.200) PLoS Neglected Tropical Diseases 8 5 e2848 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
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 Leigh R Bowman Silvia Runge-Ranzinger P J McCall Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
BACKGROUND:Despite doubts about methods used and the association between vector density and dengue transmission, routine sampling of mosquito vector populations is common in dengue-endemic countries worldwide. This study examined the evidence from published studies for the existence of any quantitative relationship between vector indices and dengue cases. METHODOLOGY/PRINCIPAL FINDINGS:From a total of 1205 papers identified in database searches following Cochrane and PRISMA Group guidelines, 18 were included for review. Eligibility criteria included 3-month study duration and dengue case confirmation by WHO case definition and/or serology. A range of designs were seen, particularly in spatial sampling and analyses, and all but 3 were classed as weak study designs. Eleven of eighteen studies generated Stegomyia indices from combined larval and pupal data. Adult vector data were reported in only three studies. Of thirteen studies that investigated associations between vector indices and dengue cases, 4 reported positive correlations, 4 found no correlation and 5 reported ambiguous or inconclusive associations. Six out of 7 studies that measured Breteau Indices reported dengue transmission at levels below the currently accepted threshold of 5. CONCLUSIONS/SIGNIFICANCE:There was little evidence of quantifiable associations between vector indices and dengue transmission that could reliably be used for outbreak prediction. This review highlighted the need for standardized sampling protocols that adequately consider dengue spatial heterogeneity. Recommendations for more appropriately designed studies include: standardized study design to elucidate the relationship between vector abundance and dengue transmission; adult mosquito sampling should be routine; single values of Breteau or other indices are not reliable universal dengue transmission thresholds; better knowledge of vector ecology is required. |
format |
Article in Journal/Newspaper |
author |
Leigh R Bowman Silvia Runge-Ranzinger P J McCall |
author_facet |
Leigh R Bowman Silvia Runge-Ranzinger P J McCall |
author_sort |
Leigh R Bowman |
title |
Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
title_short |
Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
title_full |
Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
title_fullStr |
Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
title_full_unstemmed |
Assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
title_sort |
assessing the relationship between vector indices and dengue transmission: a systematic review of the evidence. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pntd.0002848 https://doaj.org/article/ae1c7c019e684b569184fc17adb85396 |
long_lat |
ENVELOPE(-58.767,-58.767,-69.200,-69.200) |
geographic |
Arctic Prisma |
geographic_facet |
Arctic Prisma |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 8, Iss 5, p e2848 (2014) |
op_relation |
http://europepmc.org/articles/PMC4014441?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0002848 https://doaj.org/article/ae1c7c019e684b569184fc17adb85396 |
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https://doi.org/10.1371/journal.pntd.0002848 |
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PLoS Neglected Tropical Diseases |
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