Research on the bacteriocinogen properties of Pasteurella.

Research on the bacteriocinogen properties of 86 Pasteurella strains, 37 of which being Pasteurella (P.) multocida and 49 P. haemolytica, was performed. -Relations of iso- and heteroantagonism were detected and described in the P. multocida and P. haemolytica species. The presence of bacteriocins previously detected in P. multocida was confirmed and extended to P. haemolytica as well. -The bacteriocinosusceptible strains determined the separation of a number of bacteriocinotypes within each Pasteurella species. -Besides the antagonism relations a reciprocal growth stimulation phenomenon was noticed between the two Pasteurella species. In this respect, P. haemolytica displayed a wider activity towards P. multocida than towards itself.