湖南省牛无浆体病感染情况调查

SURVEY ON ANAPLASMA INFECTION IN CATTLE IN HUNAN

目的初步了解湖南省不同品种和不同年龄段牛体内无浆体病的感染情况。方法通过颈静脉采血、鲜血涂片、实验室染色镜检观察和动物接种试验的方法共调查了湖南长沙永安、龙华、益阳安化、娄底涟源和常德石门等五个大小型奶牛和肉牛场牛无浆体病发病情况。结果在5个牛场中牛无浆体染虫率分别为18.33%、58.33%、46.67%、8.33%和61.67%;其中以幼龄牛最为易感(58%),老龄牛次之(36%),青年牛多呈隐性带虫感染(22%);不同品种牛中湖北黄牛(54.17%)>荷斯坦奶牛(38.33%)>安哥斯肉牛(8.33%)。结论湖南省部分地区养牛场存在无浆体病感染,且在不同地区、不同品种和不同年龄段牛体内具有感染差异。

Objective In order to study the prevalence situation of anapiasmosis in cattle of Hunan province. Methods The infection of anaplasma in cattle were surveyed in 5 different districts of Hunan province （ Chang-sha Yong-an, Chang-sha Long-hua, Yi-yang An-hua, Lou-di Lian-yuan and Chang-de Shi-men）. Venous blood collection and blood smear were used to obtain samples from cattle, which then were stained by Wright＇ s-Giemsa method and examined by microscope. Animal inoculation test was conducted using blood samples from infected cattle. Results The infection rate with anaplasma in cattle of 5 different districts were respectively 18.33%, 58.33%, 46.67%, 8.33% and 61.67%, the susceptibility to anaplasma in diffrrent ages cattle were： the young （58%） 〉 the aged （36%） 〉the mature （22%）, and the mature were subclinically infected generally. The susceptibility in different species of cattle were： Hubei cattle （54. 17% ） 〉Holstein cows （38.33%） 〉 Angeshi cattle （8.33%）. Conclusion Anaplasma infection in cattle exist in some districts of Hunan province. The infection rate vary in different districts, different species and different ages of cattle.