关键词: 宿主动物, 恙螨, 消长

Abstract: The present paper reports the seasonal fluctuation and population situation of chigger mite in Zhanjing in 1987. 266 speciments were collected in the locality, belonging to 6 species of rodent, were examined. On an average rate of mite infested rodents was 47.37%, on an average index of mlte infested rodents was 100.2, in which the highest was in June, 87%. The average index of mite infested rodents was 100.2, the maximum in May 278. In this area, the peak of activity period of mite was between Spring and Summar. Ⅱ speciies of chigger mite were identified, and classified by making smears partly, belonging to 1 family 2 subfamilies, 7 genera, in which Leptotromoidinm deliense and Gaehrliepia(Gateria)Yangchenensis wet found in every month of the whole of year. The results obtained show that the geographical landscape and the number of rodent and insect population in Leizhou peninsula provide natunal foci conservative conditions for Tsutsugamushi disease, which has been transmitted from rodent tO rodent for a long time, so must be paid more. attention to taking measures to prevent the disease happrning in future.