Biomedical subjects
Publications and source records attributed to K H Dies.
A fecal survey was conducted to determine the prevalence of gastrointestinal helminth eggs found in 431 domestic bison from 22 herds. Eggs detected (percent of herds affected in parentheses) were: strongyle-type (100%), Capillaria sp. (63.6%), Moniezia sp. (54.6%), Nematodirus sp. (50%), Trichuris sp. (40.9%), and Strongyloides sp. (9.1%).
Four mature ewes developed mild neurological symptoms. Histological examination revealed a nonsuppurative encephalitis and myelitis associated with protozoan cysts identified as Sarcocystis spp. by immunoperoxidase. The mild clinical signs and apparent recovery of 1 ewe suggest that neurological disease caused by Sarcocystis spp. may be more common than indicated by the infrequency of reports.
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The protozoan, Klossiella equi was found in the kidneys of an aged Shetland mare raised in the Fredericton area of New Brunswick. This is the first published report of K. equi in a horse in Canada. The microscopic appearance of the parasite in the kidney is described. A brief discussion of other conditions seen in the horse is also presented.
Results of surveys for Trichinella sp. in several species of wildlife in Alberta suggest that infection is limited to wolves (Canis lupus) in northern areas of the province and maintained by a wolf/wolf transmission.
A total of 91 free-ranging black bears (Ursus americanus) from the Peace River region of northwestern Alberta was examined for helminths. Four species, Baylisascaris transfuga, Taenia krabbei, Taenia hydatigena and Dirofilaria ursi, were found. None of the bears was heavily infected. Results are compared with other similar North American surveys.
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