An analysis of surveillance results of the dengue vector <i>Aedes albopictus</i> in Wuhan, China, 2017

LIU Jing, CHEN Xiao-min, GUO Hui, DING Hao, TIAN Jun-hua

doi:10.11853/j.issn.1003.8280.2020.02.022

Chinese Journal of Vector Biology and Control >

2020 , Vol. 31 >Issue 2: 223 - 226

DOI: https://doi.org/10.11853/j.issn.1003.8280.2020.02.022

Investigation

An analysis of surveillance results of the dengue vector Aedes albopictus in Wuhan, China, 2017

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1 Wuhan Center for Disease Control and Prevention, Wuhan 430015, Hubei Province, China;
2 Dongxihu District Center for Disease Control and Prevention;
3 Qingshan District Center for Disease Control and Prevention

Received date: 2019-11-25

Online published: 2020-04-20

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Abstract

Objective To investigate the population density changes of larvae and adults of the dengue vector Aedes albopictus in Wuhan, China, and to provide a scientific basis for the strategy of Aedes vector control. Methods From April to November, 2017, the density of Ae. albopictus larvae was monitored by the Breteau index (BI) method, and that of Ae. albopictus adults was monitored by the double-layered mosquito net method and the light trap method. A database was established using Excel 2013 software. An analysis of variance was performed using SPSS 21.0 software to compare their densities between different habitats and months. The chi-square test was used for comparison of rates. Results A total of 145 Ae. albopictus were captured by light traps; the mean density was 0.52 mosquito/light·night, and the density was highest in parks (0.86 mosquito/light·night) and lowest in rural houses (0.23 mosquito/light·night). A total of 165 water containers positive for Ae. albopictus were found by the BI method; the mean BI was 10.30, and the highest BI (17.00) was observed in July. A total of 213 Ae. albopictus adults were captured by the double-layered mosquito net method; the mean density was 2.22 mosquitoes/net·hour, and the density exhibited a single peak (4.33 mosquitoes/net·hour), which occurred in September. Conclusion The high density and wide distribution of Ae. albopictus in Wuhan indicate that there is a risk of dengue outbreak in the area. It is suggested that relevant authorities should strengthen mosquito vector surveillance and environmental management to prevent local cases caused by imported dengue fever.

Key words： Dengue fever; Aedes albopictus; Surveillance; Wuhan

Cite this article

LIU Jing, CHEN Xiao-min, GUO Hui, DING Hao, TIAN Jun-hua . An analysis of surveillance results of the dengue vector Aedes albopictus in Wuhan, China, 2017[J]. Chinese Journal of Vector Biology and Control, 2020 , 31(2) : 223 -226 . DOI: 10.11853/j.issn.1003.8280.2020.02.022

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