| prevalence of and risk factors for shedding of cryptosporidium parvum in holstein freisian dairy calves in central méxico. | a total of 31 dairy farms from three states in central méxico were selected for this study in order to determine the prevalence of and risk factors for cryptosporidium parvum shedding in young holstein freisian calves. fecal samples were obtained once from each calf for acid-fast staining for detection of c. parvum oocysts. information on each calf and on each dairy's management practices regarding the maternity pen, calf hutches and calf feeding was obtained by personal interview using a standa ... | 1998 | 9762732 |