Leptospira /Lep·to·spi·ra/ (-spi´rah) a genus of aerobic spirochete bacteria (family Leptospiraceae); all pathogenic
strains (i.e., those that cause leptospirosis) are contained in the species L. inter´rogans, which is divided into several
serogroups, which are in turn divided into serotypes.

lymphocytic meningitis, hepatitis, and nephritis, separately or in combination, and varying in severity from a mild carrier
state to fatal disease.