Four strains belonging to the genus serogroup Hebdomadis were isolated from Zimbabwe cattle at slaughter. These isolates were subjected to cross-agglutinin absorption tests and to restriction fragment length polymorphism and pulsed-field gel electrophoresis analyses of their genomic DNAs. One of these strains repreents a new serovar, for which the name is proposed; strain SBF 40 is the reference strain of this serovar. The other three strains belong to a second new serovar, for which the name is proposed; the reference strain of this serovar is strain SBF 5. The three strains of serovar could be differentiated by their restriction fragment polymorphism and pulsed-field gel electrophoretic patterns.


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