| serological response to cryptosporidium parvum in adult cattle from the andean region of colombia. | single faecal and serum samples were individually collected from 135 asymptomatic adult cows on seven farms in cundinamarca (colombian andean region). tests for the presence of oocysts of cryptosporidium parvum (carbol fuchsin stain) and eimeria spp (flotation in saturated saline solution) revealed that none of the animals had coccidia in their faeces. the igg antibody levels to c. parvum were measured by an enzyme-linked immunosorbent assay (elisa) technique and the reactivity to c. parvum anti ... | 2001 | 11411953 |