Epidemiology and Vector Efficiency During a Dengue Fever Outbreak in Cixi, Zhejiang Province, China

An emigrant worker returning from Southeast Asia triggered the outbreak of a DF epidemic in Zhejiang province, China, in October, 2004. Eighty-three cases, mainly young and middle-aged people between 20 and 50 (78.3%), were reported in the area of Cixi. There were no obvious occupational patterns. T...

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Published inJournal of vector ecology Vol. 34; no. 1; pp. 148 - 154
Main Authors Yang, Tianci, Lu, Liang, Fu, Guiming, Zhong, Shi, Ding, Gangqiang, Xu, Rong, Zhu, Guangfeng, Shi, Nanfeng, Fan, Feilong, Liu, Qiyong
Format Journal Article
LanguageEnglish
Published United States Society for Vector Ecology 01.06.2009
Subjects
Adult
Aedes - virology
Aedes albopictus
Animals
China
Dengue - epidemiology
Dengue - transmission
Dengue - virology
Dengue fever
Dengue virus
Disease Outbreaks
epidemiology
Female
Humans
Humidity
Insect Vectors - virology
Male
Middle Aged
Rain
Sex Ratio
Temperature
vector efficiency
China
Southeast Asia
China, People's Rep., Zhejiang Prov
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Summary:An emigrant worker returning from Southeast Asia triggered the outbreak of a DF epidemic in Zhejiang province, China, in October, 2004. Eighty-three cases, mainly young and middle-aged people between 20 and 50 (78.3%), were reported in the area of Cixi. There were no obvious occupational patterns. The majority of cases were female, with a sex ratio of 1:1.86 (m:f). The dengue virus (DENV) strains from the epidemic area were isolated and identified as DENV-1, which belongs to Asian strain 1. According to the epidemiological investigation, the incidence of DF had no relationship to temperature, humidity, or precipitation, and the Breteau index of larvae showed a clear relationship only with the House Index and Container Index. Recent dengue problems in the town have been associated with the complex social factors and hygienic conditions for endemic villagers and immigrant workers. Some hygienic measures should be taken by the local government to reduce the risk of mosquito-borne disease. These measures should aim to eliminate the breeding sites of the vector Aedes albopictus in indoor and outdoor containers filled with rainwater and thus reducing the risk of DF transmission.
Bibliography:ObjectType-Article-1
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ISSN:1081-1710
1948-7134
DOI:10.3376/038.034.0118