The efficacy of Cary Blair medium was compared with that of Selenite 'F'in the isolation of enteropathogens from 805 cases of diarrhoea. It was shown that use of the Cary Blair medium resulted in a significantly higher rate of isolation. Not only were organisms found which were not isolated from the Selenite 'F' but there was a much higher isolation rate of Salmonella from Cary Blair medium althougn Selenite 'F' is generally considered as an enrichment medium for
Salmonella. The findings indicate that it would be advantageous to introduce Cary Blair medium as the sole transport medium for the isolation of enteropathogensfrom cases ofdiarrhoea.