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.

摘要： 目的:调查北京东灵山地区鼠类感染寄生虫的情况。方法:计算该地区3类生境中不同鼠种不同蚤类、蜱类和螨类的染虫率及其染虫指数。就鼠类的性别和年龄对其体外寄生虫的影响进行分析。结果:大仓鼠的染虫率最高,>46%;棕背■染蚤率最高,为49.37%;社鼠染螨率最高,>49%;其余的均较低。各鼠种在灌丛中的染虫指数较在森林和农田中的高。结论:宿主动物的性别对其体外寄生虫没有影响,而宿主动物的年龄对其体外寄生虫有一定影响。

关键词: 体外寄生虫, 染虫率, 染虫指数