Lyons E T, Tolliver S C, Stamper S, Drudge J H, Granstrom D E, Collins S S
Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington 40546-0099.
Vet Parasitol. 1994 Apr;52(3-4):257-69. doi: 10.1016/0304-4017(94)90117-1.
Studies were conducted on transmission of natural infections of several species of internal parasites in horses born and kept on the same pasture on a farm in central Kentucky. Data for the first year (1989) of a 4 year study on this farm have been published recently. The present research represents the second (1990), third (1991), and fourth (1992) years of the investigation. The number of animals (n = 28) examined varied from eight born in 1990 to ten each born in 1991 and 1992. For each year, examination was made of one horse per month, beginning in June of the year of birth and extending through January (1990) or March (1991 and 1992) the following year. Ages of the horses at necropsy ranged from 87 to 251 days. Major parasites present and months of recovery were: bots--Gasterophilus intestinalis in the mouth September-January and in the stomach August-March; stomach worms--Trichostrongylus axei in August and November, Habronema spp. (immature) in July-November and January, and Habronema muscae in October, January, and February; ascarids--Parascaris equorum in the small intestine and lungs all months; intestinal threadworms--Strongyloides westeri in all months except February; large strongyles--Strongylus vulgaris in the large intestine in all months except July and August and in the cranial mesenteric artery in all months, and Strongylus edentatus in the large intestine in January and in the ventral abdominal wall in all months; pinworms--Oxyuris equi in June and January-March; tapeworms--Anoplocephala perfoliata in August-October and December-March; and eyeworms--Thelazia lacrymalis August-February. Yearly differences and similarities of infections in the horses are discussed. The value of this type of research is mentioned.
对肯塔基州中部一个农场同一牧场出生并饲养的马匹体内几种内寄生虫的自然感染传播情况进行了研究。该农场为期4年研究的第一年（1989年）的数据最近已发表。本研究代表了该调查的第二年（1990年）、第三年（1991年）和第四年（1992年）。所检查动物的数量（n = 28）从1990年出生的8匹到1991年和1992年各出生的10匹不等。每年从出生年份的6月开始，每月检查一匹马，一直持续到次年的1月（1990年）或3月（1991年和1992年）。尸检时马匹的年龄在87至251天之间。存在的主要寄生虫及其检出月份如下：胃蝇——肠胃蝇，9月至次年1月出现在口腔，8月至次年3月出现在胃内；胃线虫——无齿圆线虫在8月和11月出现，夏氏属（未成熟）在7月至11月以及次年1月出现，蝇胃线虫在10月、1月和2月出现；蛔虫——马副蛔虫在小肠和肺部全年出现；肠线虫——韦氏类圆线虫除2月外全年出现；大型圆线虫——普通圆线虫除7月和8月外全年出现在大肠，全年出现在肠系膜前动脉，艾氏圆线虫1月出现在大肠，全年出现在腹前壁；蛲虫——马尖尾线虫在6月以及次年1月至3月出现；绦虫——叶状裸头绦虫在8月至10月以及12月至次年3月出现；眼虫——泪管吸吮线虫在8月至次年2月出现。讨论了马匹感染情况的年度差异和相似之处。提及了此类研究的价值。
