关键词: 体外寄生虫, 染虫率, 染虫指数

Abstract: Objective:To investigate the infestation level by ectoparasites on the rodent in Dongling Mountain,Western Beijing.Methods:Calculating the infestation ratio and ectoparasite(such as fleas,ticks,gamasid and chigger mites) indices on each rodent species in three different ecological habitats in the region.Analyzing the influences of the age or sex of host to the relative intensity of ectoparasites.Result:For Cricetulus triton the infestation ratio by ectoparasites was more than 46%,for Clethrionomys rufocanus the infestation ratio by fleas was 49.37%,for Rattus niviventer those by gamasid and chigger mites more than 49%,and the others lower.Ectoparasite indices on each rodent species in the scrub haditat were higher than those in the forest and farmland habitats.Conclusions:Ectoparasite index is affected by age to a certain degree,not by sex of the host.