Experimental Infections of Muskoxen ( Ovibos moschatus ) and Domestic Sheep with Umingmakstrongylus pallikuukensis (Nematoda: Protostrongylidae): Parasite Development, Population Structure, and Pathology

• Main Authors: Kutz, Susan J., Hoberg, Eric P., Polley, Lydden
• Format: Text
• Language: unknown
• Published: DigitalCommons@University of Nebraska - Lincoln 1999
• Subjects: Biodiversity; Ecology and Evolutionary Biology; Immunology and Infectious Disease; Parasitology; Population Biology; Zoology; muskox; ovibos moschatus
• Online Access: https://digitalcommons.unl.edu/parasitologyfacpubs/791; https://digitalcommons.unl.edu/context/parasitologyfacpubs/article/1802/viewcontent/Kutz_et_al._Uming_Exp_Infections_Can_J_Zool_1999.pdf

Three captive muskoxen (Ovibos moschatus) were successfully infected with third-stage larvae of Umingmakstrongylus pallikuukensis digested or emerged from the slugs Deroceras reticulatum and D. laeve, for the first time completing the life cycle of this parasite under experimental conditions. The course of parasite development and patency was followed for 26 months post infection (p.i.) using fecal examinations and radiography. The prepatent periods in two of the muskoxen were 91 and 95 days and the patent period in one extended for 23 months. Larval production peaked 13–14 months p.i. On postmortem of two of the muskoxen at months 14 and 26 p.i., adult parasites were found only within pulmonary cysts and cysts were randomly distributed between left and right lungs. Cyst dimensions were positively correlated with the number of adult parasites they contained. On postmortem of the third muskox at day 97 p.i., not all adult parasites were within typical cysts; two were found free in interlobular septa. Firststage larvae were recovered from lung cysts of this animal but not from feces. Lung pathology in all three muskoxen appeared localized and associated with the adult nematodes. Infection of two sheep with third-stage larvae of U. pallikuukensis did not result in parasite establishment. French abstract: Nous avons réussi à infecter trois Boeufs-musqués (Ovibos moschatus) en captivité au moyen de larves de troisième stade d’Umingmakstrongylus pallikuukensis digérées ou émergées de limaces Deroceras reticulatum et D. laeve, et c’est la première fois que tout le cycle de ce parasite se déroule avec succès dans des conditions expérimentales. Le développement du parasite et l’apparition des symptômes de l’infection ont été observés pendant 26 mois après le début de l’infection par examen des fèces et par radiographie. La période précédant l’apparition des symptômes a été évaluée à 91 et 95 jours chez deux boeufs-musqués et la période symptomatique a duré 23 mois chez l’un d’eux. La production de larves a atteint son ...