title: Isospora ohioensis sp. n. proposed for I. rivolta of the dog.
abstract: A new name, Isospora ohioensis, is proposed for I. rivolta-like oocysts from dog feces. The name I. rivolta is retained for the cat species. The structure of the oocysts of I. ohioensis is described from a cloned culture of oocysts. Oocysts are 24 by 21 mum, sporocysts 17 by 12 mum, and sporozoites 10 by 3 mum. In cross-infection experiments none of 6 coccidia-free dogs shed oocysts after consuming feline I. rivolota, and none of 4 coccidia-free cat shed oocysts after eating canine I. rivolta.
mesh_terms: D000818:Animals; D016782:Apicomplexa / Q000302:isolation & purification; D002371:Cat Diseases / Q000469:parasitology* / Q000635:transmission; D002415:Cats; D003048:Coccidiosis / Q000635:transmission / Q000662:veterinary*; D004283:Dog Diseases / Q000469:parasitology* / Q000635:transmission; D004285:Dogs; D005243:Feces / Q000469:parasitology; D005260:Female; D005856:Germ-Free Life; D007549:Isospora / Q000145:classification*; D051379:Mice; D010270:Parasite Egg Count; D013045:Species Specificity; D009626:Terminology as Topic