北京市首例基孔肯雅热病例流行病学调查

Investigation of the first Chikungunya fever case in Beijing

目的调查北京市首例基孔肯雅热（Chikungunyafever，CHIKV）病例的感染来源。方法通过对患者及其密切接触人员访谈，分析患者的感染来源。结合北京市病媒生物监测数据，分析北京市出现CHIKV流行的风险。结果北京市首例CHIKV病例为印度境内感染的境外输入性病例。病媒生物监测数据显示，该病例在京期间北京市伊蚊密度较低，北京市不会出现由此病例引发的CHIKV暴发。结论2008—2010年，北京亚优势蚊种-白纹伊蚊的构成比和蚊媒密度逐年增加，北京市应继续做好病媒生物监测，并加强CHIKV防控工作，降低CHIKV暴发的风险。

Objective To investigate the source of the first chikungunya fever （CHIKV） case in Beijing. Methods The infection source of the case was analyzed by interviewing the case and other key persons. Furthermore, the vector biology survey data of the city Beijing was used to evaluate the risk of CHIKV prevalence. Results The first CHIKV case of Beijing was infected in India who was an introduced case. The vector biology survey data showed that the aedes albopietus density was low, so the outbreak risk of CHIKV in Beijing has been excluded during the period when the case stayed in Beijing. Conclusion The mosquito density of aedes albopictus has been increasing from 2008 to 2010 in Beijing, thus we should make efforts to promote better vector biology surveillance and take effective measures to prevent the outbreak risk of CHIKV.