ABSTRACT
isospora ohioensis, i. burrowsi, and i. neorivolta Middle-sized canine coccidians acquired by eating sporulated oocyst or infected rodent. PPP= 6 to 7 days. Dx: Oocyst in feces are clear, ellipsoid (17 to 27 µm x 16 to 23 µm). Habitat: Isospora ohioensis: schizonts in intestinal cells of the jejunum, gametocytes in epithelial cells of small intestine, cecum and colon. Isospora burrowsi: schizonts and gametocytes in lamina propria of the caudal 3/5ths of small intestine. Isospora neorivolta: lamina propria of the posterior 1/2 of small intestine. Similar Species: Cannot distinguish these 3 species using oocyst morphology. Need to separate from smaller organisms of potential zoonotic importance. Range: World. Clinical Signs: Diarrhea that can be hemorrhagic. Can cause death in heavy infections. Tx: Once oocysts appear in feces, most of the damage from development in the mucosa has already occurred. Sulfonamides are the drugs of choice:
