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Effect of Existing Practices on Reducing Aedes aegypti Pre-adults in Key Breeding Containers in Ho Chi Minh City, Vietnam

This study aimed to evaluate the effects of existing practices of residents in reducing pre-adult Aedes aegypti (L.) infestation and to assess the effect of dengue-related knowledge on the practices. A house-to-house survey was conducted in two areas with different socioeconomic status in Ho Chi Minh City between October and November 2007. Some residents in both the areas used covers on the productive containers such as the jars and plastic buckets (i.e., 58% and 81% in the two study areas), and it was effective in reducing Ae. aegypti infestation: odds ratio (OR) of 4.0 and 4.9 (95% confidence interval [CI]: 1.49–10.76 and 1.2–19.57, respectively) for the containers with inappropriate covers compared with those with appropriate covers in the two areas, respectively. Appropriate cover use was an effective practice; however, no beneficial role of the knowledge related to dengue in promoting the practice was identified.

Received November 12, 2008. Accepted for publication February 17, 2009.

Acknowledgments: We express our deep gratitude to Cuc Vu, Sy Ngo, Lap Nguyen, Tung Le, Khanh Ly, Van Nguyen, and Thai Nguyen in the Ho Chi Minh Pasteur Institute and No. 8 District Health Office for field assistance. We also thank Hideki Yanai for valuable suggestions.

Financial support: This research was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (A2), 14256003, 2007.

^* Address correspondence to Ataru Tsuzuki, Department of Vector Ecology and Environment, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan. E-mail: atarutsuzuki{at}hotmail.com

Authors’ addresses: Ataru Tsuzuki, Takashi Tsunoda, Hitoshi Kawada, and Masahiro Takagi, Department of Vector Ecology and Environment, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan, Tel: 81-95-849-7809, Fax: 81-95-849-7812. Trang Huynh and Loan Luu, Ho Chi Minh Pasteur Institute, 167 Pasteur Street, District 3, Ho Chi Minh City, Vietnam, Tel: 84-8-38204108, Fax: 84-8-38231419.

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				A. Tsuzuki, V. T. Duoc, Y. Higa, N. T. Yen, and M. Takagi Effect of Peridomestic Environments on Repeated Infestation by Preadult Aedes aegypti in Urban Premises in Nha Trang City, Vietnam Am J Trop Med Hyg, October 1, 2009; 81(4): 645 - 650. [Abstract] [Full Text] [PDF]