In January 1990, fecal samples from two dairy and five beef cattle farms located in Montes Claros, MG, Brazil were examined by using the centrifugation-flotation method in saturated sugar solution. Thirteen (27,1 per cent), of 48 two month-old calves were positive for oocysts of Cryptosporidium muris, found in one beef cattle and two dairy farms. Six (6,6 per cent) out of 91 cows were positive for C. parvum oocysts. This species of coccidium was observed in one dairy and two beef cattle farms. All cows were negative for C. muris