Agarose gel electrophoretic analysis showing PCR amplified products of multiple agents of diarrhoea. Lane 1: Salmonella sp(s) positive (575 bp), lane 2: Salmonella sp negative, lane 3: Clostridium perfringens (Cl) positive (279 bp), lane 4: C. perfringens (Cl) negative, lane M: DNA marker (100 bp plus, SRL), lane 5: bovine coronavirus (Co) positive (406 bp), lane 6: bovine coronavirus (Co) negative, lane 7: Cryptosporidium parvum (Cr) positive (194 bp), lane 8: C. parvum (Cr) negative control.