Five strains of the genus belonging to serogroup Pyrogenes were isolated from cattle slaughtered in Zimbabwe and subjected to cross-agglutinin absorption and restriction fragment length polymorphism analysis. One strain, SBF 2, represents a new genetic strain of serovar , while another strain, SBF 49, is a new genetic strain closely related to serovar Three strains belong to a new serovar for which the name with reference strain SBF 20 is proposed. Restriction fragment length polymorphism analysis indicated that each of these three strains represents a different restriction polymorphism pattern group.


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