Formosan Entomologist (2005) 25, 159-174

Chau-Mei Ho, Chenn-Chung Feng, Cheng-Ta Yang, Min-Wei Lin, Hwa-Cheng Teng, Ming-Ho Lai, Ting-Shian Lin, Err-Lieh Hsu, Shu-Cheng Wu, Hsiu-Hua Pai and Chih-Ming Yin (2005)
Surveillance for Dengue fever vectors using ovitraps at Kaohsiung and Tainan in Taiwan
Formosan Entomologist 25 (3), 159-174
Abstract: We used ovitraps, set out weekly, to monitor for Aedes aegypti and Aedes albopictus at Tainan and Kaohsiung, Taiwan, in 2002. The average proportion of ovitraps with mosquitoes - the ovitrap index (OI) was 46% in those two cities. If this value is considered as a container index, the vector density would be at level 9 in terms of Ae. aegypti density, which is much higher than that estimated by the Breteau index. The average egg number of Aedes sp. also could be estimated based on the OI with the formula developed by the general model. Our data from those areas tested revealed that the OI is a more sensitive index for detecting the presence of Aedes than the Breteau index. They also showed that Ae. aegypti was a dominant species in Tainan and Kaohsiung most of the time in 2002. Analyses revealed that weekly cases of Dengue fever (DF) and Dengue hemorrhagic fever (DHF) were correlated with the number of adult female Ae. aegypti collected from three studied sub-areas of Kaohsiung with the correlation coefficient of 0.62 in 2002. Our survey also indicated that air temperature and precipitation are not directly related to increases of mosquitoes in ovitraps. Thus, under circumstances where the Breteau index is low, the ovitrap method should be applied as an additional surveillance tool to evaluate the risk of human Dengue infection, and the need for mosquito vector control.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Err-Lieh Hsu

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aedes albopictus		Taiwan
	Aedes aegypti		Taiwan