Cornelissen A W, Verstegen R, van den Brand H, Perie N M, Eysker M, Lam T J, Pijpers A
Department of Parasitology and Tropical Veterinary Medicine, Utrecht University, Netherlands.
Vet Parasitol. 1995 Jan;56(1-3):7-16. doi: 10.1016/0304-4017(94)00671-x.
The prevalence of oocysts of Eimeria species in calves (n = 334), yearlings (n = 254) and cows (n = 1314) was determined on 38 Dutch dairy farms. Twelve species of Eimeria were identified in faecal specimens by sucrose-flotation. The prevalences of Eimeria spp. differed markedly in the different age classes on individual farms as well as between farms. The overall prevalence of Eimeria oocysts in faecal specimens was 46% for calves, 43% for yearlings and 16% for cows. The number of oocysts excreted was generally low in cows and yearlings, whereas high numbers of oocysts per gram of faeces (OPG) were exclusively observed in calves. No cases of clinical coccidiosis were observed in this survey. Linear regression analysis showed that there is significant reduction in the OPG levels (P < 0.05) in calves infected with Eimeria, aged between 7 and 38 weeks. Finally, the data are discussed in relation to management practices and the acquisition of immunity.
在38个荷兰奶牛场中，测定了犊牛（n = 334）、一岁牛（n = 254）和母牛（n = 1314）中艾美耳球虫属卵囊的流行情况。通过蔗糖漂浮法在粪便样本中鉴定出12种艾美耳球虫。在各个农场中，不同年龄组以及不同农场之间，艾美耳球虫属的流行情况差异显著。粪便样本中艾美耳球虫卵囊的总体流行率为：犊牛46%，一岁牛43%，母牛16%。母牛和一岁牛排出的卵囊数量通常较少，而仅在犊牛中观察到每克粪便中含有大量卵囊（OPG）。在本次调查中未观察到临床球虫病病例。线性回归分析表明，7至38周龄感染艾美耳球虫的犊牛，其OPG水平显著降低（P < 0.05）。最后，结合管理措施和免疫获得情况对数据进行了讨论。
