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Enterococcus saigonensis sp. nov., isolated from retail chicken meat and liver.

Two Gram-stain-positive strains, VE80T and VE116, which were resistant to vancomycin, were isolated from retail chicken meat and liver in Ho Chi Minh, Vietnam, respectively. These strains were characterized by sequence analyses of 16S rRNA, RNA polymerase α-subunit (rpoA), ATP synthase α-subunit (atpA), and phenylalanyl-tRNA synthase α-subunit (pheS) genes, determination of DNA G+C content, cellular fatty acid methyl ester analysis, DNA-DNA hybridization, and conventional morphological and biochemical tests. Strains VE80T and VE116 had 99.6 % 16S rRNA gene sequence similarity with Enterococcus canintestini LMG 13590T, and 99.1 % 16S rRNA gene sequence similarity with Enterococcus dispar ATCC 51266T. However, the two isolates could be clearly differentiated from these reference strains by the low sequence similarities (86.1-86.8 %) of the atpA gene, low DNA-DNA relatedness (<22.8 %), and differences in the production of acid from melezitose and methyl α-d-glucoside. Based on the results obtained in the present study, these two isolates are considered to represent a novel species of the genus Enterococcus, for which the name Enterococcus saigonensis sp. nov., is proposed. The type strain is VE80T (=JCM 31193T=CCUG 68827T).