title: Unusual gastric nematodes of swine in Ontario.
mesh_terms: D000818:Animals; D009349:Nematode Infections / Q000453:epidemiology / Q000662:veterinary*; D009864:Ontario; D013272:Stomach Diseases / Q000453:epidemiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology*