Lyons E T, Tolliver S C, Drudge J H, Swerczek T W, Crowe M W
Am J Vet Res. 1985 Apr;46(4):921-3.
Prevalence of natural infections of the lungworm, Dictyocaulus arnfieldi, was investigated in Kentucky in 5,437 live equids (horses, ponies, and asses) on 91 farms by examination of fecal samples over a 15-month-period from January 28, 1983 to April 19, 1984. For the 91 farms investigated, asses only were examined on 1 farm; for the other 90 farms, examinations were made of horses on all of them, of ponies on 4 farms, and of asses on 9 farms. Larvae of D arnfieldi were found in fecal samples of 112 (2%) of 5,379 horses on the 90 farms of which 38% had greater than or equal to 1 infected animal; none of 19 ponies examined was infected. For 39 asses (donkeys and mules) examined, 21 (54%) were infected; infected asses were present on 80% of the 10 farms on which they were examined. The equids, excluding asses, that were examined and the percentage (in parentheses) infected with D arnfieldi included 4,329 (2%) Thoroughbreds, 684 (2%) Standardbreds, 78 (0%) American Saddle Horses, and 307 (3%) miscellaneous (other breeds or mixed breeds of horses and ponies). Equids were separated into 3 categories relative to previous treatment with ivermectin: A (no treatment), B (treatment), and C (treatment unknown).(ABSTRACT TRUNCATED AT 250 WORDS)
1983年1月28日至1984年4月19日的15个月期间，通过检查粪便样本，对肯塔基州91个农场的5437头活体马科动物（马、矮种马和驴）进行了调查，以研究肺线虫——安氏网尾线虫的自然感染率。在被调查的91个农场中，仅在1个农场检查了驴；在其他90个农场中，对所有农场的马、4个农场的矮种马和9个农场的驴进行了检查。在90个农场的5379匹马中，有112匹（2%）的粪便样本中发现了安氏网尾线虫幼虫，其中38%的农场有1头或更多受感染动物；所检查的19匹矮种马均未感染。在所检查的39头驴（包括驴和骡）中，21头（54%）受到感染；在检查的10个农场中，80%有受感染的驴。除驴外，接受检查的马科动物及其感染安氏网尾线虫的百分比（括号内）包括4329匹纯种马（2%）、684匹标准赛马（2%）、78匹美国鞍马（0%）和307匹其他品种（马和矮种马的其他品种或混种）（3%）。根据之前使用伊维菌素的治疗情况，马科动物被分为3类：A（未治疗）、B（治疗）和C（治疗情况未知）。（摘要截短于250字）
