Milnes A S, Green L E
Department of Clinical Veterinary Science, University of Bristol, Langford.
Vet Rec. 1999 Sep 25;145(13):357-62. doi: 10.1136/vr.145.13.357.
A postal questionnaire was used to collect information on the prevalence of lice on cattle on a random sample of dairy farms in England and the bordering counties of Wales. Replies were received from 1040 (52.8 per cent) of the 1970 farms which were mailed. Fifty per cent of farmers reported having ever seen or suspected lice in their herds and 29 per cent reported possible infestations in the winter of 1996/97. Visits were made to 24 farms in the south west of England during February 1998. Twelve of the farmers said that they had seen or suspected lice in their herd since October 1997, and that lice were more frequently observed on the adult cattle. However, examination revealed lice on 18 of the 24 farms, and adult cattle were the least likely group to be infested.
通过邮政问卷调查收集了关于英格兰奶牛场以及威尔士接壤郡县随机抽样奶牛场中牛群虱子感染率的信息。在邮寄问卷的1970个农场中，收到了1040个（52.8%）的回复。50%的农民报告称曾在其牛群中见过或怀疑有虱子，29%的农民报告在1996/97年冬季可能有感染情况。1998年2月对英格兰西南部的24个农场进行了走访。其中12位农民表示自1997年10月以来他们在牛群中见过或怀疑有虱子，并且在成年牛身上更频繁地观察到虱子。然而，检查发现24个农场中有18个农场存在虱子，而成年牛是最不容易被感染的群体。
