The prevalence of porcine cryptosporidiosis was determined in Ogun State, southwest Nigeria. Faecal samples from two hundred and nine pigs of different ages were examined for Cryptosporidium parvum antigen using a commercial enzyme-linked immunosorbent assay (ELISA) kit. A total of 31.1% of the samples were positive for Cryptosporidium parvum antigen. The infection rate was significantly higher (p
Cryptosporidium parvum, ELISA, faeces, Nigeria, pigs.