关键词: 体重, 肝毛细线虫, 鼠传疾病, 布氏田鼠, 种群密度

Abstract: The infection characters of Capillaria hepatica on the Brandt's vole (Lasiopodomys brandtii) was investigated in Xilinguole, Inner Mongolia in 2005. Current analysis showed that there was no apparent sexual discrepancy on the infection rate of C. hepatica in the Brandt's vole. The infection rate of females was the same as that of male voles. However,the infection rate is highly associated with the body mass and age of the voles. Juveniles were rarely infected by C. hepatica. Based on our data,the lowest body mass of vole infected by the C. hepatica is 24.3 grams. The infective rate is significantly positive correlated with age,the older age groups suffer higher infection rates than relatively younger groups. Moreover, the infection index is also significantly positively correlated with age. Furthermore, Body mass is another indictor which is significantly positively correlated with infection rate and infection index. Our data also showed that the density of vole population had no apparent influence on the mean infective rate of C. hepatica,neither on the infection index. The infection rate of C. hepatica on the Brandt's vole in May was higher than in August. However,the infection rates of C. hepatica on voles in different seasons are highly correlated in the same sample plot.

Key words: Body mass, Capillaria hepatica, Brandt's vole (Lasiopodomys brandtii), Population density, Rodent borne diseases