Tolliver S C, Lyons E T, Drudge J H
Vet Parasitol. 1987 Feb;23(3-4):273-84. doi: 10.1016/0304-4017(87)90013-6.
The prevalence and number of naturally acquired gastrointestinal parasites were compiled for horses used in critical tests of activity of parasiticides over a 28-year period (1956-1983). Data are presented as follows: n = number of horses examined; % = mean prevalence; number in parentheses after % = aggregate mean number of parasites in infected horses. Parasites found were: bots (n = 513) - Gasterophilus intestinalis, 2nd instar, 61%(58); 3rd instar, 94%(168); G. nasalis, 2nd instar, 36%(28); 3rd instar, 81%(51); stomach worms (n = 200) - Habronema muscae, 65%(179); Draschia megastoma, 29%(95); Trichostrongylus axei, 46%(3000); ascarids (n = 513) - Parascaris equorum, mature, 50%(25); immature, 23%(33); tapeworms (n = 513), Anoplocephala perfoliata, 17%(15); A. magna, 14%(10); large strongyles (n = 487), Strongylus vulgaris, 84%(80); S. edentatus, 79%(101); S. equinus, 6%(14); small strongyles (n = 210), 100%(142,000); pinworms (Oxyuris equi), immature (n = 210), 78%(9000); mature (n = 506), 40%(62); Probstmayria vivipara (n = 210), 12%(10(7]; S. vulgaris in cranial mesenteric artery (n = 472), 89%(57). The majority of the horses examined were mixed lighthorse type but several Thoroughbreds were included. Ages varied from about 4 months to 20 years old, with most being approximately 1-3 years old. They probably had either no or infrequent previous treatment with parasiticides. Most of the horses were selected for presence of certain internal parasites, usually large strongyles, prior to usage in the critical tests.
在28年期间（1956 - 1983年），对用于杀虫剂活性关键测试的马匹自然感染的胃肠道寄生虫的流行率和数量进行了汇总。数据呈现如下：n = 检查的马匹数量；% = 平均流行率；%后括号内的数字 = 感染马匹体内寄生虫的总平均数量。发现的寄生虫有：胃蝇蛆（n = 513）——肠胃蝇，二龄幼虫，61%（58条）；三龄幼虫，94%（168条）；鼻胃蝇，二龄幼虫，36%（28条）；三龄幼虫，81%（51条）；胃线虫（n = 200）——蝇柔线虫，65%（179条）；大口德拉什线虫，29%（95条）；马圆形线虫，46%（3000条）；蛔虫（n = 513）——马副蛔虫，成虫，50%（25条）；未成熟虫体，23%（33条）；绦虫（n = 513），叶状裸头绦虫，17%（15条）；大裸头绦虫，14%（10条）；大型圆线虫（n = 487），普通圆线虫，84%（80条）；无齿圆线虫，79%（101条）；马圆线虫，6%（14条）；小型圆线虫（n = 210），100%（142,000条）；蛲虫（马尖尾线虫），未成熟（n = 210），78%（9000条）；成熟虫体（n = 506），40%（62条）；胎生普罗布斯特线虫（n = 210），12%（107条）；肠系膜前动脉中的普通圆线虫（n = 472），89%（57条）。检查的大多数马匹是混合轻型马类型，但也包括几匹纯种马。年龄从约4个月到20岁不等，大多数约为1 - 3岁。它们之前可能未接受过杀虫剂治疗或很少接受治疗。大多数马匹在用于关键测试之前因存在某些体内寄生虫（通常是大型圆线虫）而被挑选出来。
