genus species name for intestinal parasites in animals
1 Genus Isospora is the most common cause of intestinal coccidiosis in dogs and cats. 2  Species of Isospora are host-specific, infecting only one species. 3  Species that infect dogs include I. canis, I. ohioensis, I. burrowsi, and I. neorivolta.4  Species that infect cats include I. felis and I. rivolta. Genus Hepatozoon contains one species that causes hepatozoonosis in dogs and cats, H. canis. 2  Animals become infected by ingesting an infected brown dog tick (Rhipicephalus sanguineus). 3  Symptoms include fever, weight loss, and pain in the spine and limbs.