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为了解山东地区恙虫病流行情况及影响因素，于１９９４～１９９７年采用现场调查与实验室检测相结合的办法，对费县恙虫病进行了调查研究。结果表明年发病率为０４１～１０９‰（１９９５年属该病的高峰年），发病自然村占总自然村的５６６８％（１０６／１８７），有１３个自然村连续四年均有病例出现，其中以汪沟乡闵寨村病例最多共３３例，年发病率为３４５‰。发病高峰在１０月中、下旬，以２６～３５年龄组患者最多；男性多于女性（１３∶１），患者多为农民（占８３７６％）。病例对照研究结果表明：田间坐卧史、居住环境潮湿及居住村庄边缘为恙虫病危险因素，此外影响当地恙虫病自然因素还有鼠密度及小盾纤恙螨密度。
In order to understand the epidemic situation and influencing factors of scrub typhus in Shandong Province, from 1994 to 1997, a combination of on-the-spot investigation and laboratory testing was used to investigate the scrub typhus in Fei County. The results showed that the annual incidence was 0 41 ~ 1 09 ‰ (1995 is the peak of the disease), natural villages accounted for 56 68% (106/187) of the total natural villages, there are 13 villages for four consecutive years A total of 33 cases were found in Minzhai Village, Wanggou Township. The annual incidence rate was 345 ‰. The peak incidence in mid-October and late, with 26 to 35 age group, the largest number of men than women (1 3: 1), mostly farmers (83 76%). The results of case-control study showed that: the history of sitting in the field, the wet living environment and the edge of the living village are the risk factors of scrub typhus, in addition to the natural factors affecting the local scrub typhus as well as the density of rodents and the density of daphnid-mite.