title: The species of Cryptosporidium (Apicomplexa: Cryptosporidiidae) infecting mammals.
abstract: Oocysts of Cryptosporidium muris (Apicomplexa: Cryptosporidiidae) were obtained from the feces of naturally infected calves. Oocysts were fully sporulated in fresh feces, measured 7.4 X 5.6 (6.6 - 7.9 X 5.3 - 6.5) micron, and possessed a longitudinal suture along one pole of the oocyst wall. Morphologic and biologic evidence obtained from this study demonstrated that C. muris is a species distinct from Cryptosporidium parvum, which has smaller oocysts.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D003044:Coccidia / Q000145:classification*; D003457:Cryptosporidiosis / Q000469:parasitology*; D003458:Cryptosporidium / Q000145:classification* / Q000502:physiology / Q000648:ultrastructure; D005243:Feces / Q000469:parasitology; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D013170:Spores / Q000502:physiology