Environmental factors influence the local establishment of Wolbachia in Aedes aegypti mosquitoes in two small communities in central Vietnam
Background: The w Mel strain of Wolbachia has been successfully introduced into Aedes aegypti mosquitoes and subsequently shown to reduce transmission of dengue and other pathogens, under both laboratory and field conditions. Here we describe the entomological outcomes of w Mel Wolbachia mosquito re...
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Published in | Gates open research Vol. 5; p. 147 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
London, UK
F1000 Research Limited
01.01.2021
|
Online Access | Get full text |
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Summary: | Background:
The
w
Mel strain of
Wolbachia
has been successfully introduced into
Aedes aegypti
mosquitoes and subsequently shown to reduce transmission of dengue and other pathogens, under both laboratory and field conditions. Here we describe the entomological outcomes of
w
Mel
Wolbachia
mosquito releases in two small communities in Nha Trang City in central Vietnam.
Methods:
The
w
Mel strain of
Wolbachia
was backcrossed into local
Aedes aegypti
genotype and mosquito releases were undertaken by community members or by staff. Field monitoring was undertaken to track
Wolbachia
establishment in local
Ae. aegypti
mosquito populations. Ecological studies were undertaken to assess relationships between environmental factors and the spatial and temporal variability in
Wolbachia
infection prevalence in mosquitoes.
Results:
Releases of
w
Mel
Wolbachia Ae. aegypti
mosquitoes in two small communities in Nha Trang City resulted in the initial establishment of
Wolbachia
in the local
Ae. aegypti
mosquito populations, followed by seasonal fluctuations in
Wolbachia
prevalence. There was significant small-scale spatial heterogeneity in
Wolbachia
infection prevalence in the Tri Nguyen Village site, resulting in the loss of
w
Mel
Wolbachia
infection in mosquitoes in north and center areas, despite
Wolbachia
prevalence remaining high in mosquitoes in the south area. In the second site, Vinh Luong Ward,
Wolbachia
has persisted at a high level in mosquitoes throughout this site despite similar seasonal fluctuations in
w
Mel
Wolbachia
prevalence.
Conclusion:
Seasonal variation in
Wolbachia
infection prevalence in mosquitoes was associated with elevated temperature conditions, and was possibly due to imperfect maternal transmission of
Wolbachia
. Heterogeneity in
Wolbachia
infection prevalence was found throughout one site, and indicates additional factors may influence
Wolbachia
establishment. |
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Bibliography: | new_version No competing interests were disclosed. |
ISSN: | 2572-4754 2572-4754 |
DOI: | 10.12688/gatesopenres.13347.2 |