title: Isospora vulpina Nieschulz and Bos, 1933: description, and transmission from the fox (Vulpes vulpes) to the dog.
abstract: Oocysts of Isospora vulpina were found in silver foxes (Vulpes vulpes) on a fox farm in Wisconsin. They were 29.7 (25-38) X 24.3 (21-32) mum. The sporocysts were 17.7 (15-23) X 13 (11-16) mum. Five coccidia-free puppies were inoculated with 22,000-42,000 oocysts each of I. vulpina from the fox: a patent infection resulted after 6-7 days. The infection was then transferred from 1 of these dogs to another coccidia-free puppy. After a 7-day prepatent period the puppy passed oocysts for 7 days.
mesh_terms: D000818:Animals; D003048:Coccidiosis / Q000635:transmission / Q000662:veterinary*; D004283:Dog Diseases / Q000635:transmission*; D004285:Dogs; D005589:Foxes; D007549:Isospora / Q000166:cytology*