甘肃省牛的蜱传性血液原虫虫种和分布特征的调查

Investigations on tick-borne blood protozoa and characteristics of their distribution in Gansu

利用病原检查法在甘肃省42个县市对1311头牛进行了牛蜱传性血液原虫调查,并研究了不同生态地区虫种的分布特征。调查共发现双芽巴贝西虫、大巴贝西虫、边缘边虫、瑟氏泰勒虫、环形泰勒虫5种病原。双芽巴贝西虫分布于文县、康县,感染率为3.33％～6.25％;大巴贝西虫分布于两当、天水北道、康县、成县、清水、崇信等地;瑟氏泰勒虫分布于陇南山区、陇东高原 及夏河、临夏、天祝、武威、张掖、定西、临洮等地,感染率为4.16％～100％;环形泰勒虫分布于临泽、民乐、安西、高台、敦煌、永昌、民勤等地,感染率为24.3％～90.32％;边缘边虫主要分布于陇南各县及崇信县。这次调查中发现的大巴西虫和边缘边虫在甘肃系首次报道。

1311 cattle (including farm cattle, dairy cows, yaks and crossbred yaks) in 42 counties and cities of Gansu province were examined for investigating tick-borne blood protozoa. Five pathogenic protozoa Babesia bigemina, B. major, Anaplasma marginale, Theileria sergenti and T. annulata were detected. The infection rates of the 5 protozoa ranged from 3.33% to 6.25%, from 3.33% to 16.81%, from 13.33% to 45.16%, from 4.16% to 100% and from 24.32 to 90,32% respectively, and B. bigemina and B. major was transmitted by Boophilus microplus and Haelmaphysalis longiconis respectively. And B. major and A. marginale were discovered first in Guansu.The ecology and distribution characters of thesse protozoa were described.