[The natural foci of the tsutsugamushi disease in the suburbs of Hang Zhou City].

In 1986, investigating tsutsugamushi disease in the suburbs of Hangzhou, We isolated Rickettsia tsutsugamushi from leptotrombidium gaohuense and its reservoir hosts, Rattus confucianus and Rattus fulvescens, which were collected in Yang Shan Wu village, Linan county. It proved there was a natural focus of tsutsugamushi disease in the suburbs of Hang zhou. Which is located at 30 degrees 35'. North latitude, and main forest of the East Tianmu Mountain, covered by wide and needle leaves, with more wide leaves than needle one. The vector is leptotrombidium gaohuense. The host are Rattus confucianus and fulvescens. Such focus belongs to inland-mountain type.