| prevalence of cryptosporidium infections in pigs in aragón (northeastern spain). | faecal samples from 620 pigs randomly selected from 27 farms throughout aragón were examined to determine the prevalence of cryptosporidium infections. detection of oocysts was performed using the ethyl-acetate stool concentration method and the modified ziehl-neelsen technique. cryptosporidium parvum oocysts were identified in 136 (21.9%) pigs from 21 (77.8%) farms. infected animals ranged from 1 to 6 months old and oocysts were not detected in suckling piglets or adults. infection rates were s ... | 1996 | 9011017 |