| further determination of dna relatedness between serogroups and serovars in the family leptospiraceae with a proposal for leptospira alexanderi sp. nov. and four new leptospira genomospecies. | dna relatedness was determined among 303 strains of leptospira and leptonema. included in the analysis were reference strains from 228 well-characterized and recognized serovars. the study included 268 serovars from 29 named and one or more unnamed serogroups. the strains clustered into 17 dna hybridization groups, representing 12 previously described species (292 strains) and five new genomospecies (11 strains). the largest groups included leptospira interrogans (91 strains from 82 serovars), l ... | 1999 | 10319510 |