Low Entomological Impact of New Water Supply Infrastructure in Southern Vietnam,with Reference to Dengue Vectors |
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| Authors: | Hau P Tran Trang T T Huynh Yen T Nguyen Simon Kutcher Peter O'Rourke Louise Marquart Peter A Ryan Brian H Kay |
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| Institution: | Institute Pasteur, Ho Chi Minh City, Vietnam; School of Population Health, University of Queensland, Herston, Queensland, Australia; Queensland Institute of Medical Research, Royal Brisbane Hospital, Brisbane, Queensland, Australia; National Institute of Hygiene and Epidemiology, Hanoi, Vietnam; Australian Foundation for Peoples of Asia and the Pacific Ltd., Ho Chi Minh City, Vietnam |
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| Abstract: | We did a prospective study in southern Vietnam where new water infrastructure was added. New 1,200-L tanks may present potential breeding grounds for Aedes aegypti, particularly when sealed lids were not always supplied. Some householders in these communes received a piped water supply, however there was no reduction in water storage practices. The prevalence of Aedes aegypti immatures in tank and tap households reached 73%, but were non-significantly different from each other and from control households that received no infrastructure. In all three communes, standard jars comprised from 48% to 71% of containers but were associated with > 90% of III–IV instars and pupae on occasions. In contrast, project tanks contributed from 0–21% of the total population. Non-functional or no lids were apparent 4 months after installation in 45–76% of new tanks, but there was no difference between communes with lids and without lids. |
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