南京地区奶牛消化道寄生虫感染情况调查

为了解规模化奶牛场奶牛消化道寄生虫感染情况,本调查对南京地区2个规模化奶牛场的279份粪样进行了线虫卵、球虫卵囊和吸虫卵的定性与定量检测,以便为南京地区奶牛寄生虫病的防治提供依据.结果显示,279份样本中,阳性157份,总感染率为56.27％,其中A牧场感染率为54.61％（77/141）,B牧场感染率为57.79％ （77/138）;蠕虫阳性64份,总感染率为22.94％,A牧场感染率为12.06％（17/141）,B牧场感染率为34.06％ （47/138）;原虫阳性141份,总感染率为50.54％,A牧场感染率为50.36％（71/141）,B牧场感染率为50.72％（70/138）.2个规模化奶牛场奶牛寄生虫均有混合感染现象,混合感染率分别为18.18％（14/77）、55％（44/80）.检测出的寄生虫主要是犊牛新蛔虫、食道口线虫、肝片吸虫、前后盘吸虫、牛艾美耳球虫、邱氏艾美耳球虫、椭圆艾美耳球虫和隐孢子虫.

Investigation on the Infection of Intestinal Parasites in Dairy Cows in Nanjing Area

To define the infection of intestinal parasites in large-scale dairy farm,the experiment adopt the saturated salt water and syrup floating method,sedimentation and acid-fast staining to examine the excrement of cows in Nanjing.Also,the experiments adopt the Mike McMaster counting method and J Tauer Pfato to examine the egg of nematode and coccidia oocysts.The results showed that there were 157 positive samples in total 279 samples.The total infection rate was 56.27％,of which the A farm was 50.36％,while the B farm was 57.79％.There were 64 samples positive in helminth examination,which made the total infection rate up to 22.94％.The infection rate of A farm was 54.61％ in helminth examination,while the B farm made 34.06％.Results also showed 141 samples positive in protozoa examination,which made the infection rate up to 50.54％.The infection rate of A farm was 50.36％ in protozoa examination,while the B farm was 50.72％.The highest EPG in farms was 43000 in coccidia,11000 in flukes and 10000 in nematode.Mixed infection existed in two large-scale farms with A 18.18％ and B 55％.The parasite in detestation mainly were crypto,elliptic eimeriida,cow＇s eimeriida,nematode,ascrimd and trematode.