McKenna P B
Batchelar Animal Health Laboratory, PO Box 536, Palmerston North, New Zealand.
N Z Vet J. 1997 Dec;45(6):244-6. doi: 10.1080/00480169.1997.36038.
Fifteen (36%) of 42 mixed gastro-intestinal nematode infections in sheep, identified as drench-susceptible by the undifferentiated faecal egg count reduction test, were found to harbour anthelmintic-resistant worms when analysed on the basis of changes in the egg counts of individual nematode genera. Most of these cases involved resistance in a single nematode genus, with Ostertagia and Trichostrongylus being implicated most frequently. The possible contributory role of larval culture results in helping to reduce the chances of the faecal egg count reduction test producing these and similar types of errors is discussed.
在绵羊的42例混合胃肠道线虫感染中，有15例（36%）通过未分化粪便虫卵计数减少试验被鉴定为对驱虫药敏感，但根据单个线虫属虫卵计数的变化进行分析时，发现其中存在抗驱虫药的蠕虫。这些病例大多涉及单个线虫属的耐药性，其中奥斯特他线虫属和毛圆线虫属最为常见。本文讨论了幼虫培养结果在帮助减少粪便虫卵计数减少试验产生此类及类似错误可能性方面可能起到的作用。
