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Published online by Cambridge University Press: 15 May 2009
In two groups, each containing 56 Pasteurella multocida strains of avian origin, the percentage of multicin-producing strains was 80·4 and 71·4. In two groups containing 46 and 58 isolates tested for sensitivity to multicins, 82·6% and 62·1% respectively were listed as indicators. P. multocida strains producing bacteriocins were active on a range of 1–33 indicators. A preliminary multicin typing system was set up with the use of eight selected indicators; 52% of multicin-producing strains acted on one indicator only. P. multocida serotypes and serologically un-typable strains were subdivided into multicin types.