Adult Survivorship of the Dengue Mosquito Aedes aegypti Varies Seasonally in Central Vietnam

Hugo, Leon E., Jeffery, Jason A. L., Trewin, Brendan J., Wockner, Leesa F., Nguyen Thi Yen, Nguyen Hoang Le, Le Trung Nghia, Hine, Emma, Ryan, Peter A. and Kay, Brian H. (2014) Adult Survivorship of the Dengue Mosquito Aedes aegypti Varies Seasonally in Central Vietnam. PLoS Neglected Tropical Diseases, 8 2: e2669.1-e2669.12. doi:10.1371/journal.pntd.0002669


Author Hugo, Leon E.
Jeffery, Jason A. L.
Trewin, Brendan J.
Wockner, Leesa F.
Nguyen Thi Yen
Nguyen Hoang Le
Le Trung Nghia
Hine, Emma
Ryan, Peter A.
Kay, Brian H.
Title Adult Survivorship of the Dengue Mosquito Aedes aegypti Varies Seasonally in Central Vietnam
Formatted title
Adult Survivorship of the Dengue Mosquito Aedes aegypti Varies Seasonally in Central Vietnam
Journal name PLoS Neglected Tropical Diseases   Check publisher's open access policy
ISSN 1935-2735
Publication date 2014-02-01
Sub-type Article (original research)
DOI 10.1371/journal.pntd.0002669
Open Access Status DOI
Volume 8
Issue 2
Start page e2669.1
End page e2669.12
Total pages 12
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Language eng
Formatted abstract
The survival characteristics of the mosquito Aedes aegypti affect transmission rates of dengue because transmission requires infected mosquitoes to survive long enough for the virus to infect the salivary glands. Mosquito survival is assumed to be high in tropical, dengue endemic, countries like Vietnam. However, the survival rates of wild populations of mosquitoes are seldom measured due the difficulty of predicting mosquito age. Hon Mieu Island in central Vietnam is the site of a pilot release of Ae. aegypti infected with a strain of Wolbachia pipientis bacteria (wMelPop) that induces virus interference and mosquito life-shortening. We used the most accurate mosquito age grading approach, transcriptional profiling, to establish the survival patterns of the mosquito population from the population age structure. Furthermore, estimations were validated on mosquitoes released into a large semi-field environment consisting of an enclosed house, garden and yard to incorporate natural environmental variability. Mosquito survival was highest during the dry/cool (January-April) and dry/hot (May-August) seasons, when 92 and 64% of Hon Mieu mosquitoes had survived to an age that they were able to transmit dengue (12 d), respectively. This was reduced to 29% during the wet/cool season from September to December. The presence of Ae. aegypti older than 12 d during each season is likely to facilitate the observed continuity of dengue transmission in the region. We provide season specific Ae. aegypti survival models for improved dengue epidemiology and evaluation of mosquito control strategies that aim to reduce mosquito survival to break the dengue transmission cycle.
Keyword Near-Infrared Spectroscopy
Diptera-Culicidae
Transcriptional Profiles
Cuticular Hydrocarbons
Wolbachia Infection
Population-Dynamics
Field Validation
Survival Rates
Age
Transmission
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Biological Sciences Publications
 
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