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Kluyvera  is a genus within the family  Enterobacteriaceae  and can cause various human infections but remains poorly studied. A carbapenem-resistant  bla  NDM–  1 -carrying  Kluyvera  strain 090646 T  was isolated from a hospital sink in Chengdu, Sichuan province, China. Whole genome sequencing of the strain revealed that it had 28.2 to 42.3%  in silico  DNA-DNA hybridization ( is DDH) scores and 84.15 to 90.10% average nucleotide identity (ANI) values with other  Kluyvera  species. Both values are well below the ≥ 70.0%  is DDH and ≥ 95–96% ANI cutoffs to define bacterial species, suggesting that the strain represents a novel species of the genus  Kluyvera , for which the name  Kluyvera sichuanensis . nov. is proposed. Type strain of  K. sichuanensis  is 090646 T  (=GDMCC 1.1872 T  =KCTC 82166 T ). Strain 090646 T  can be differentiated from other  Kluyvera  species by its ability to utilize  D -sorbitol but not β-galactosidase (ONPG),  D -mannose, glycerin, raffinose, nor sucrose. There were 47 genome sequences labeled as  Kluyvera  in GenBank, which were curated for precise species identification. Only 33 of the 47 genomes were indeed of  Kluyvera  and four novel  Kluyvera  genomospecies were identified, highlighting that the species assignation of bacterial genomes in GenBank need to be curated. Genome sequencing for more strains is required to understand the genus  Kluyvera .

Precise Species Identification and Taxonomy Update for the Genus Kluyvera With Reporting Kluyvera sichuanensis sp. nov.