The presence of
Isospora oocysts was investigated in 1, 542 household dogs in relation to age, rearing conditions, origins, sex, breed, and fecal conditions.
Isospora oocysts were detected in the feces of 96 of 1, 542 (6.2%) of the animals examined. The detection rates were higher in dogs aged 1-6 months and in dogs reared indoors. Rates were high in dogs from pet shops and breeding kennels. No significant sex-related differences in oocyst detection were observed. Rates were high in Chihuahuas and Papillons and low in mongrels. Rates of
Isospora-oocyst detection were high in soft and diarrheic feces and still higher in feces including mucus and/or blood. On the basis of size, the oocysts detected were identified as
I. canis and
I. ohioensis.
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