Boxell A C, Gibson K T, Hobbs R P, Thompson R C A
Division of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, Western Australia 6150.
Aust Vet J. 2004 Jan-Feb;82(1-2):91-5. doi: 10.1111/j.1751-0813.2004.tb14653.x.
To assess the occurrence of gastrointestinal parasites in horses in Perth. To apply polymerase chain reaction (PCR) for the identification of some species of encysted larval cyathostomes.
Between February and September of 2000, the gastrointestinal tracts of 29 horses submitted to a local knackery and Murdoch University Veterinary hospital in Perth were examined post mortem for the presence of gastrointestinal parasites.
The gastrointestinal tract was divided into six sections, which were screened for the presence of parasites such as Gasterophilus sp, Anoplocephala sp and Parascaris equorum. Samples of contents were taken for worm counts.
Cyathostomes were found in 28 of the 29 horses. Eighteen species of gastrointestinal helminths were identified. Twelve of these were cyathostomes, with the four most common species being Cyathostomum catinatum, Cylicocyclus nassatus, Cylicostephanus longibursatus and Cylicostephanus goldi. The large strongyle, Triodontophorus serratus, was found in three of the horses but species of Strongylus were not found.
In contrast to a study conducted on horses from this region in 1985, cyathostomes were the most common gastrointestinal parasites found. The four most common cyathostome species found in the present study correlated well with findings of studies in other locations. The high number of cyathostomes may be due to the increase in resistance to anthelmintics among the species, and to improper anthelmintic use. The apparent reduction in number of large strongyles may be due to the widespread use of ivermectin, which is very effective against these parasites, and also possibly because some larvae may not have been detected.
评估珀斯马匹胃肠道寄生虫的感染情况。应用聚合酶链反应（PCR）鉴定某些种类的包囊幼虫圆线虫。
在2000年2月至9月期间，对送至珀斯当地一家屠宰场和默多克大学兽医院的29匹马的胃肠道进行尸检，以检查胃肠道寄生虫的存在情况。
将胃肠道分为六个部分，筛查是否存在诸如胃蝇属、裸头绦虫属和马副蛔虫等寄生虫。采集内容物样本进行虫卵计数。
29匹马中有28匹发现有圆线虫。鉴定出18种胃肠道蠕虫。其中12种为圆线虫，最常见的四种是卡氏圆线虫、鼻环圆线虫、长囊圆线虫和戈氏圆线虫。在三匹马中发现了大型圆线虫锯齿三齿线虫，但未发现圆线属的种类。
与1985年对该地区马匹进行的一项研究相比，圆线虫是最常见的胃肠道寄生虫。本研究中发现的四种最常见的圆线虫种类与其他地区的研究结果相关性良好。圆线虫数量众多可能是由于该物种对驱虫药的耐药性增加以及驱虫药使用不当。大型圆线虫数量明显减少可能是由于广泛使用对这些寄生虫非常有效的伊维菌素，也可能是因为一些幼虫未被检测到。
