[Cryptosporidiosis in calves during the period of milk nutrition].

It has been found out by examining faeces of 83 calves from calf house in Uhercice (Breclav district) that 52 calves excreted coccidium oocysts, genus Cryptosporidium Tyzzer, 1907, during the period of milk nutrition. The calves excreted oocysts from the eighth day of age, and at the end of the milk nutrition period (43rd-47th ridium Tyzzer, 1907, during the period of milk nutrition. The calves excreted oocysts of cryptosporidia were found in two thirds of calves suffering from diarrheas. By histological examination of a 27-day-old calf, developmental stages of this coccidium were found on the surface of villus epithelium in the distal part of ileum. Villi were shortened and expanded, submucous connective tissue was penetrated by inflammatory infiltrate with large quantity of eosinophil granulocytes. For demonstration of oocysts in faeces, Breza flotation method combined with sedimentation and staining by modified Giemsa panoptic method were used.