Lyons E T, Tolliver S C
Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington, KY, 40546-0099, USA,
Parasitol Res. 2014 Nov;113(11):4163-4. doi: 10.1007/s00436-014-4088-1. Epub 2014 Aug 23.
The prevalence of patent Strongyloides westeri infections was determined by examination for eggs in fecal samples collected from 513 Thoroughbred (TB) foals between February 25 and June 3, 2014. The study was conducted with 244 colts and 269 fillies from 11 well-managed farms in Central Kentucky. Foals ranged from 17 to 117 days of age and had never been dewormed. The mean prevalence of patent S. westeri infection was 30% (156/513 foals). This prevalence was substantially greater than historical reports from the same sampling area during the late 1990s and early 2000s. It is hypothesized that this change is attributable to diminished use of ivermectin in foals due to concerns about macrocyclic lactone resistance in Parascaris equorum.
2014年2月25日至6月3日期间，通过检查从513匹纯种马驹粪便样本中采集的虫卵，确定了威氏类圆线虫感染的流行情况。该研究对象为来自肯塔基州中部11个管理良好的农场的244匹雄驹和269匹雌驹。马驹年龄在17至117天之间，从未进行过驱虫。威氏类圆线虫感染的平均流行率为30%（513匹驹中有156匹感染）。这一流行率显著高于20世纪90年代末和21世纪初同一采样区域的历史报告。据推测，这种变化是由于担心马副蛔虫对大环内酯类药物产生耐药性，导致马驹中伊维菌素的使用减少所致。
