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对山东费县秋冬型恙虫病疫源地恙螨进行了调查并进行恙虫病立克次体（Ｒｔ）分离。从３５２只活鼠体外收集到１１ ７６２只恙螨，隶属２属５种，太平洋无前恙螨数量最多，占３６．７３％；其次是临淮岗纤恙螨（２４．０４％）；小盾纤恙螨（２１．６５％）；须纤恙螨（１３．５７％）和泰山纤恙螨（３．９６％）。小盾纤恙螨出现在９—１２月，高峰在１１月；须纤恙螨出现在１０月一翌年４月，高峰在１２月；临淮岗纤恙螨从５月到１１月存在，高峰在８月；太平洋无前恙螨出现在４—１２月，高峰在７月。从小盾纤恙螨、须纤恙螨、临淮岗纤恙螨及太平洋无前恙螨中共分离到１２株Ｒｔ，血清分型结果分离株以Ｇｉｌｌｉａｍ型为主，但存在Ｋａｒｐ型Ｒｔ。这些结果表明，上述４种恙螨均能自然感染Ｒｔ，有在该地区充作不同季节Ｒｔ传播媒介的可能。结合以往的研究结果，当地小盾纤恙螨集中出现于发病季节，其消长与当地人群发病基本一致，且能叮刺、经卵传递Ｒｔ，从而证实小盾纤恙螨是引起该地区秋冬型恙虫病流行的最重要的媒介。
The autumn and winter type scrub typhus flies mites in Shandong Feixian were investigated and screened Rickettsia rickettsi (Rt) separation. There were 11 762 chigger mites out of 352 live rats, belonging to 2 genera and 5 species. The number of chimp mites was the highest in the Pacific, accounting for 36.73% of the total, followed by Linchuan chigger mites (24.04%). Chigger mite (21.65%), Chigger mite (13.57%) and Chigger moss (3.96%). Small shield fiber mite occurred in September-December, the peak in November; to be chigger mites appear in October the following year in April, the peak in December; Lin Huai Gang fiber mite mite from May to November there, the peak In August; Pacific chimp mites appear in April-December and peak in July. Twelve Rt were isolated from chigger mite, chigger mite, Linyi gangchuan mite and Pacific chigger mite. The serotype type strains were Gilliam type, but Karp type Rt was found. These results indicate that all 4 chigger mites naturally infected with Rt may have the potential to serve as Rt vectors of different seasons in the region. Combined with the results of previous studies, the local small shield chigger mites appear concentrated in the onset of the season, the rise and decline and the incidence of the local population is basically the same, and can be stabbed, egg delivery Rt, to confirm the small shield chigger mites is caused by autumn and winter type The most important medium for the scrub typhus epidemic.