四川省青海田鼠疫源地媒介蚤的研究

Fleas notified on Microtus fuscus loci in Sichuan province

目的分析2000--2008年四川省青海田鼠疫源地媒介蚤各指标的变化。方法统计分析四川省2000—2008年鼠疫监测工作资料。结果青海田鼠疫源地存在蚤类4科10属19种，以细钩盖蚤为主（62．79％），直缘双蚤指名亚种次之（30．90％）；青海田鼠寄生蚤染蚤率和蚤指数有明显的季节变化，10月染蚤率及蚤指数较高，12月和3月则较低；可自然感染鼠疫的蚤类有3种（细钩盖蚤、直缘双蚤指名亚种和五侧纤蚤邻近亚种）。结论青海田鼠疫源地染疫动物和蚤类持续存在，应加强鼠疫监测。

Objective To analyzed the variant information on the indices regarding fleas from natural loci of Microtus plague in Sichuan epidemic area during 2000 to 2008. Methods Statistical and analytical methods were used on the surveillance data regarding Microtus fuscus plague. Results There were 19 flea species identified and the share of Callopsylla sparsilis was 62.79 percent while the share ofAmphipsylla tuta tuta was 30.90 percent on Microtusfuscus plague. The infection rate of fleas and the flea index were the highest in October and the lowest in December and March. Species as Callopsylla sparsilis, Amphipsylla tuta tuta and Rhadinopsylla dahurica vicina could naturally infect the Yersinia pestis. Conclusion Microtus fuscus plague could become epidemic when animals and flea species were infected. We should emphasis on plague monitoring program so as to prevent the occurrence of the disease.