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- Uhazy, Leslie S.; Holmes, John C.; Stelfox, John G.
- Canadian journal of zoology 1973 v.51 no.8 pp. 817-824
- Ovis canadensis; Protostrongylus; feces; fetus; herds; lambs; larvae; lungs; lungworms; seasonal variation; Alberta; British Columbia
- ... In 58 sets of lungs from bighorns from western Alberta or eastern British Columbia, 91% were infected with Protostrongylus stilesi, and 38% were infected with P. rushi. Four of the five sheep free of P. stilesi were lambs. Lungs from nine near-term fetuses were negative for lungworms.All but 1 of 409 field-collected fecal samples from the same ranges contained larvae of Protostrongylus spp.; count ...