关键词: 恙螨, 季节消长, 恙虫病, 立克次体, 分离

Abstract: The author observed monthly the seasonal fluctuation of mites collected from wild rodents in Fei county, Shandong province, and isolation of Rt was carried out from predominant mites in various seasons. The results were as followings: Leptotrombidium(L.) scutellare appeared massly in autumn and early winter, the peak was in November; L.palpale appeared from October to April of the second year, the peak was in December, and was predominant in winter; L. linhuaikonese appeared in May to November, the peak was in August, and was predominant in summer; Walchia(W.) pacifica was all collected from Cricetulus triton and existed from April to December, the peak was in July.4 strains of Rt were isolated from 10 groups of L.scutellare; 4 strains were isolated from L.palpale; 2 strains from L.linhuaikonese; 2 strains from W.pacifica. Serotypes of 12 strains above revealed that all were identical to strain Gilliam except one isolated from L.linhuaikonese was strain Karp. The results indicated that L.linscutellare was the main transmitting vector of Rt; but it is important to detect whether the other species of mites only act as hosts or as hosts and vectors of Rt.