Leptospira venezuelensis sp. nov., a new member of the intermediate group isolated from rodents, cattle and humans

Abstract

Three strains, CLM-U50T, CLM-R50 and IVIC-Bov1, belonging to the genus Leptospira , were isolated in Venezuela from a patient with leptospirosis, a domestic rat (Rattus norvegicus) and a cow (Bos taurus), respectively. The initial characterisation of these strains based on the rrs gene (16S rRNA) suggested their designation as a novel species within the ‘intermediates’ group of the genus Leptospira . Further phylogenomic characterisation based on single copy core genes was consistent with their separation into a novel species. The average nucleotide identity between these three strains was >99 %, but below 89 % with respect to any previously described leptospiral species, also supporting their designation as a novel species. Given this evidence, these three isolates were considered to represent a novel species, for which the name Leptospira venezuelensis sp. nov. is proposed, with CLM-U50T (=CIP 111407T=DSM 105752T) as the type strain.