[Incidence of coccidia in dogs in Brno and the surrounding area].

In the course of two years, 663 dogs from Brno and its vicinity were subjected to clinical and parasitological examination with a special reference to the occurrence of coccidia. A saturated sugar solution with the specific weight of 1150 was used as the flotation medium. Coccidia were found in 2.17% of the dogs examined. The oocysts of the groups Isospora ohioensis, I. burowsi and I. neorivolta were identified most frequently (2.11% of the dogs). Four dogs (0.60%), all alike, eliminated the oocysts of Hammondia heydorni and sporocysts of Sarcocystis species, and two dogs oocysts of Hammondia heydorni and sporocysts of Sarcocystis species, and two dogs (0.30%) excreted oocysts of I. canis. Out of the animals infected, 58% were younger than six months. Clinical signs were observed only at a medium to strong invasion with oocysts of the species I. ohioensis, I. burowsi and I. neorivolta. The digestive tract was affected most severely--the animals suffered from bloodless diarrhoeas lasting two to twelve days, from occasional vomiting and systemic dehydration. Invasion by I. canis, Hammondia heydorni and Sarcoystis sp. did not cause any clinical changes.