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１９９３年山西南部发生恙虫病流行，至１９９５年流行范围已由１个村扩展到２个县４个乡１７个村。收治的３５例病人中具有发热、焦痂者均为１００％，同时具有发热、皮疹、淋巴结肿大、焦痂者占６０％。８例１０月分血清用ＩＦ法检查，抗恙虫病立克次体抗体ＩｇＭ、ＩｇＧ均为阳性；２例恢复期ＩｇＧ抗体滴度呈４倍增高，最高者达１∶５１２０；住院病例外斐氏反应ＯＸｋ阳性率为３７％，流行区正常人群抽样调查阳性率为１０％。病人静脉血接种小白鼠腹腔，分离到２株恙虫病立克次体（ＳＸＨ－９５１、ＳＸＨ－９５２）。从而证实了位于长江以北的内陆地区也出现了恙虫病的疫源地。
The tsutsugamushi epidemic occurred in southern Shanxi in 1993 and by 1995 the epidemic range had been expanded from one village to 17 villages in 4 townships in 2 counties. 35 patients admitted to the fever, eschar were 100%, at the same time with fever, rash, swollen lymph nodes, scabs accounted for 60%. Eight cases of sera from October to October were tested by IF method, and IgM and IgG antibodies against Rickettsia tsutsugamushi were positive. IgG antibody titers of the two recovered quadruples, with the highest being 1:5120; OXk’s response rate was 37%, the prevalence of normal population sampling survey positive rate was 10%. The patient’s venous blood was inoculated into the peritoneal cavity of mice and two Rickettsia tsutsugamushi isolates (SXH-951, SXH-952) were isolated. This confirmed that the outbreak of scrub typhus also occurred in the inland areas north of the Yangtze River.