Abundance and prevalence of Aedes aegypti immatures and relationships with household water storage in rural areas in southern Viet Nam

Nguyen, Le Anh P., Clements, Archie C. A., Jeffery, Jason A. L., Yen, Nguyen Thi, Nam, Vu Sinh, Vaughan, Gregory, Shinkfield, Ramon, Kutcher,Simon C., Gatton, Michelle L., Kay, Brian H. and Ryan, Peter A. (2011) Abundance and prevalence of Aedes aegypti immatures and relationships with household water storage in rural areas in southern Viet Nam. International Health, 3 2: 115-125.


Author Nguyen, Le Anh P.
Clements, Archie C. A.
Jeffery, Jason A. L.
Yen, Nguyen Thi
Nam, Vu Sinh
Vaughan, Gregory
Shinkfield, Ramon
Kutcher,Simon C.
Gatton, Michelle L.
Kay, Brian H.
Ryan, Peter A.
Title Abundance and prevalence of Aedes aegypti immatures and relationships with household water storage in rural areas in southern Viet Nam
Formatted title Abundance and prevalence of Aedes aegypti immatures and relationships with household water storage in rural areas in southern Viet Nam
Journal name International Health  (ERA 2012 Listed)   Check publisher's open access policy
Publication date 2011-06
Sub-type Article
DOI 10.1016/j.inhe.2010.11.002
Volume number 3
Issue number 2
ISSN 1876-3413
1876-3405
Start page 115
End page 125
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract Since 2000, the Government of Viet Nam has committed to provide rural communities with increased access to safe water through a variety of household water supply schemes (wells, ferrocement tanks and jars) and piped water schemes. One possible, unintended consequence of these schemes is the concomitant increase in water containers that may serve as habitats for dengue mosquito immatures, principally Aedes aegypti. To assess these possible impacts we undertook detailed household surveys of Ae. aegypti immatures, water storage containers and various socioeconomic factors in three rural communes in southern Viet Nam. Positive relationships between the numbers of household water storage containers and the prevalence and abundance of Ae. aegypti immatures were found. Overall, water storage containers accounted for 92–97% and 93–96% of the standing crops of III/IV instars and pupae, respectively. Interestingly, households with higher socioeconomic levels had significantly higher numbers of water storage containers and therefore greater risk of Ae. aegypti infestation. Even after provision of piped water to houses, householders continued to store water in containers and there was no observed decrease in water storage container abundance in these houses, compared to those that relied entirely on stored water. These findings highlight the householders’ concerns about the limited availability of water and their strong behavoural patterns associated with storage of water. We conclude that household water storage container availability is a major risk factor for infestation with Ae. aegypti immatures, and that recent investment in rural water supply infrastructure are unlikely to mitigate this risk, at least in the short term.
Keyword Dengue
Mosquitoes
Public health
Vector-borne diseases
Water management
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article
Collections: Official 2012 Collection
School of Population Health Publications
 
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Created: Tue, 06 Sep 2011, 14:30:07 EST by Geraldine Fitzgerald on behalf of School of Population Health