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西省南部的翼城和绛县一带农区存在有恙虫病的自然疫源地,该地区连年有恙虫病病例发生。通过连续数年的调查发现,该地的恙虫病属秋冬型,每年九月下旬至十一月上旬为病例的发生高峰。主要疫源动物为大仓鼠(Cricetulustriton),在寄生于鼠类的节肢动物中,姬鼠纤恙螨(Leptotrombidiumapodemi)为绝对优势种,其数量约占当地恙螨科种类的93.2%,其季节消长与当地恙虫病的流行趋势一致,被认为是该地恙虫病流行的传播媒介,不同于北方地区其它已知的恙虫病自然疫源地
In the agricultural areas of Yicheng and Jiangxian areas in the southern province of Western Province, there are natural foci of tsutsugamushi disease and cases of tsutsugamushi disease occur in successive years in this area. Through successive years of investigation, the scrub typhus in the area is of the autumn-winter type, with the peak of cases occurring from late September to early November each year. The major foci were Cricetulustriton. Among the arthropods parasitized in mice, Leptotrombidium mapodemi was the dominant species, accounting for 93.2% of the species of the local chigger mites. The seasonal fluctuation In line with the epidemic trend of scrub typhus in the area, it is considered as a transmission medium for the epidemic of scrub typhus in this area, unlike other known natural sources of scrub typhus in northern China