Synonyms: Globidium leuckarti.
Hosts: Horse, ass.
Location: Small intestine.
Geographic Distribution: Europe, India.
Prevalence: Apparently uncommon.
Morphology: The sporulated oocysts have been described by Reichenow (1940a) and Hiregaudar (1956a). They are ovoid, somewhat flattened at the smaller end, and 75 to 88 by 50 to 59 u. The oocyst wall is composed of 2 layers, of which the outer is dark brown, 5 to 7 u thick, opaque and granular, and the inner layer is about 1 u thick and colorless. The micropyle is distinct. An oocyst residuum is absent. An oocyst polar granule is apparently absent. The sporocysts are elongate, 30 to 42 by 12 or 14 u with a Stieda body. A sporocyst residuum is present. The sporozoites are elongate, up to 35 u long, with a clear globule at the large end. The sporulation time is 21 days at 20 to 22° C in Germany (Reichenow) or 15 days during the hot days of October in India (Hiregaudar).
Life Cycle: The schizonts and merozoites of this species have not been described. The sexual stages were described most recently by Hemmert-Halswick (1943). They are found beneath the epithelium in the villi of the small intestine. The microgametocytes measure up to 300 by 170 u when mature. The macrogame.tes contain both eosinophilic and basophilic plastic granules which later form the wall of the oocyst.
Pathogenesis: Diarrhea, loss of weight and even death have been reported in heavily infected animals. Hemmert-Halswick (1943) described marked inflammatory changes in the small intestine mucosa.
Diagnosis: Diagnosis can be made by finding the endogenous stages of this coccidium in association with lesions in the intestine. The oocysts are seldom seen in feces because they are so heavy that they do not rise to the surface in the salt solutions used for flotations.