Rickard L G, Bishop J K
College of Veterinary Medicine, Oregon State University, Corvallis 97331.
J Parasitol. 1991 Feb;77(1):70-5.
Whipworms collected from llamas (Lama glama) in Oregon were identified as Trichuris tenuis Chandler, 1930. A redescription, based on the specimens collected from llamas and examination of the paratypes, is presented. The unique form of the cloaca in T. tenuis separates males of this species from all other species of Trichuris known to occur in ruminants. Among species of Trichuris for which adequate descriptions of the female exist, T. tenuis can be distinguished using an array of characters including an uneverted, aspinous vulva and a highly convoluted vagina with papillalike spines in the proximal one-fourth and a small egg chamber located approximately midway along its length. This constitutes only the second report of T. tenuis in North America and brings to 7 the number of species of Trichuris known to occur in sylvatic and domestic ruminants in North America.
从俄勒冈州的美洲驼（小羊驼）体内采集到的鞭虫被鉴定为1930年钱德勒命名的捻转血矛线虫。基于从美洲驼采集的标本以及副模式标本的检查结果，本文给出了重新描述。捻转血矛线虫独特的泄殖腔形态使其雄性个体与已知寄生于反刍动物的其他所有毛首线虫属物种相区分。在对雌性个体有充分描述的毛首线虫属物种中，捻转血矛线虫可通过一系列特征来鉴别，包括不外翻、无刺的阴门，以及在近端四分之一处有乳头状棘且高度盘绕的阴道，还有位于其长度大约中部位置的一个小卵腔。这是北美地区关于捻转血矛线虫的第二篇报道，使已知寄生于北美野生和家养反刍动物的毛首线虫属物种数量增至7种。
