Eysker M, Claessens E W, Lam T J, Moons M J, Pijpers A
Department of Parasitology and Tropical Veterinary Medicine, Utrecht University, Netherlands.
Vet Parasitol. 1994 Jun;53(3-4):263-7. doi: 10.1016/0304-4017(94)90189-9.
The results of a survey on the prevalence of patent lungworm infections in herds of dairy cows in the Netherlands are presented. Low patent infections were recorded in February-March on six out of 40 farms in at least one out of 40 cows. Between mid-April and mid-June low patent infections were detected on 28 out of 39 of these farms in one to four of 40 cows. Two farms on which cows were positive in the first round were negative in the second round. One to three positive cows were found on six out of a total of 15 farms revisited in July-August. These results show that lungworm infections are cycled within herds of dairy cows in the Netherlands at a low level. This indicates that dairy cows are important as carriers for lungworm, particularly in spring. The increased patency of lungworm in cows from winter to spring may be explained by maturation of inhibited larvae.
本文展示了荷兰奶牛群中肺线虫感染率的调查结果。2月至3月期间，在40个农场中的6个农场，至少40头牛中有1头检测到低水平的肺线虫感染。4月中旬至6月中旬，在39个农场中的28个农场，40头牛中有1至4头检测到低水平的肺线虫感染。第一轮检测呈阳性的两个农场，第二轮检测呈阴性。7月至8月重新检测的15个农场中，有6个农场发现1至3头阳性奶牛。这些结果表明，荷兰奶牛群中肺线虫感染呈低水平循环。这表明奶牛作为肺线虫的携带者很重要，尤其是在春季。奶牛从冬季到春季肺线虫感染率增加可能是由于受抑制幼虫的成熟。
