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Int J Syst Evol Microbiol. 2018 Dec;68(12):3922-3927. doi: 10.1099/ijsem.0.003089. Epub 2018 Nov 2.

Enterobacter sichuanensis sp. nov., recovered from human urine.

Wu W1,2,3, Feng Y1,2,3, Zong Z1,2,3.

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1​Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, PR China.
2​Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, PR China.
3​Center for Pathogen Research, West China Hospital, Sichuan University, Chengdu, PR China.


An Enterobacter strain, WCHECL1597T, was recovered from the urine of a patient in China in 2016. Phylogenetic analysis based on its 16S rRNA gene sequence indicated the strain belongs to the genus Enterobacter, while multi-locus sequence analysis of the rpoB, gyrB, infB and atpD housekeeping genes revealed that the strain was distinct from any previously described Enterobacter species. The whole genome sequence of strain WCHECL1597T had a 79.81-91.49 % average nucleotide identity to those of type strains of all known Enterobacter species. In silico DNA-DNA hybridization values between strain WCHECL1597T and the type strains of all known Enterobacter species ranged from 22.8 to 45.2 %. The major cellular fatty acids of strain WCHECL1597T were C16 : 0, C17 : 0cyclo and C18 : 1ω7c, which are in the quantitative range of other Enterobacter species while differentiated by the relatively higher amount (12.3 %) of iso-c16 : 1 I/C14 : 0 3-OH. The genomic DNA G+C content was 55.2 mol%. Strain WCHECL1597T could be distinguished from all known Enterobacter species by its ability to ferment inositol but with a negative l-rhamnose and d-mannitol reaction. Genotypic and phenotypic characteristics from this study indicate that strain WCHECL1597T represents a novel species of the genus Enterobacter, for which the name Enterobactersichuanensis sp. nov. is proposed. The type strain is WCHECL1597T (=GDMCC1.1217T=CCTCC AB 2017104T=KCTC 52994T).


Enterobacter; genome; urine


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