Abstract
The current descriptions of the genus Leptospira Noguchi and the species L. interrogans and L. biflexa (Int. J. Syst. Bacteriol. 30: 225-420) are inadequate and out of date. On behalf of the members of the Subcommittee on the Taxonomy of Leptospira of the International Committee on Systematic Bacteriology, amended descriptions of these taxa are presented.