Pybus M J, Shave H
J Wildl Dis. 1984 Oct;20(4):284-8. doi: 10.7589/0090-3558-20.4.284.
Lungs and fecal samples from nine hunter-killed Rocky Mountain bighorn sheep were examined for lungworms. All samples contained adults and/or larvae of Muellerius capillaris (Mueller, 1889). Protostrongylus spp., the lungworms commonly reported from bighorn sheep, were not present in any samples. Larvae of M. capillaris bear a spine on the dorsal side of the posterior end and are shorter than dorsal-spined larvae of other lungworms recorded from North American ungulates. Larvae similar in shape but longer than those of Muellerius were found in free-ranging bighorn sheep in Alberta and British Columbia. In addition, dorsal-spined larvae have been found in bighorn sheep in Montana, North Dakota, and Washington. The identity of the dorsal-spined larvae is known only from sheep in South Dakota. Thus, caution must be taken when diagnosing lungworm infections in Rocky Mountain bighorn sheep.
对9只被猎人捕杀的落基山大角羊的肺和粪便样本进行了肺线虫检查。所有样本均含有毛细缪勒线虫（Mueller, 1889）的成虫和/或幼虫。大角羊中常见报道的原圆科线虫属在任何样本中均未出现。毛细缪勒线虫的幼虫在后端背侧有一根刺，且比从北美有蹄类动物身上记录到的其他带背刺幼虫的肺线虫短。在艾伯塔省和不列颠哥伦比亚省的野生大角羊中发现了形状相似但比毛细缪勒线虫幼虫更长的幼虫。此外，在蒙大拿州、北达科他州和华盛顿州的大角羊中也发现了带背刺幼虫。仅在南达科他州的绵羊中知道带背刺幼虫的身份。因此，在诊断落基山大角羊的肺线虫感染时必须谨慎。
