In recent years, cryptosporidium, a coccidian parasite of the intestine, has been associated with neonatal diarrhea in calves. Cryptosporidium were found in feces of 23 calves with diarrhea (28.77%), while, the parasite were not found in the feces of 20 clinically normal calves examined. Cryptosporidia were demonstrated microscopically in Modified Acid Fast stained smears of feces from infected calves. Supportive therapy and strict hygienic measures would help to control the spreading of crytosporidiosis among young calves.