湖南城步县南山牧场蜱及牛梨形虫病的发生特点

Some Biological Characteristics of Ticks and Piroplasmas of Cattle in Southmountain Farm Hunan Province

１９９２～１９９６年调查表明，湖南南山牧场寄生于奶牛体内的血液原虫有瑟氏泰勒原虫，传播者为长角血蜱。据流行病学，该病发生在夏秋季。１９９２～１９９４年犊牛５～８月发生，高峰期６～７月；成年牛发生于６～９月，高峰期７～８月。１９９５年犊牛发生于８～９月，高峰期９月，成年牛发生于８～１０月。病理剖检见皱胃大面积出血，胃粘膜似红布状。用贝尼尔或咪唑苯脲预防注射发病奶牛死亡率由２６％降为５．９％。

The investigation from 1992 to 1995 showed that theileria sergnti was found in the blood of the disease-stricken cows in Southmountain Pasture of Hunan Province.Of the disease,haemaphysalis longicornis was the vector Epidemiology indicating that this disease.usually occurs in summer or autumn.It attacks in the time from May to August for calves and reaches its peak in June or July(as happened in the time from 1992 to 1994)For the cattles the starting time came in the time from June to September with its peak coming in July or August.In 1995,the onset time for calves was in August and September with its peak time in September.A large area of hemorrhagein had been found in the abomasum on the surface looking like a piece of red cloth.The sick cattle were treated with berenilum and imidocarb injection.And the result was that the death-rate was reduced from 26% to 5.9%.