Identification of Leptospira serovars by restriction-endonuclease analysis

Strains of Leptospira interrogans were examined by restriction-endonuclease analysis. Serovars hardjo and balcanica gave patterns that differed from each other, and from those of other members of the Hebdomadis serogroup and members of other serogroups. The method should be useful for the identification of leptospires and might throw light on problems of their classification.