| detection of faecal cryptosporidium parvum antigen in diarrheic holstein dairy cows. | over a one-year period, based on a random cluster sampling design, 661 faecal samples from natural cases of diarrheic calves were taken in fars province of iran. the samples were taken from the 267 diarrheic calves of high and 394 diarrheic calves of average producing holstein dairy cows. faecal samples were collected directly from the rectum. herd selection was based on geographical location and density of cattle in the region. samples were collected based on 5 percent of herd populat ... | 2011 | 22041760 |