Abstract
In this investigation it has been confirmed that group B streptococci, whether of bovine or human origin, have a low incidence of bacteriocinogenicity. Differences appear to exist in susceptibility to streptococcal bacteriocins, human strains being relatively insensitive compared with bovine strains. There appears to be a potential application for S-typing of group B streptococci, particularly in the case of isolates of bovine origin.