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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 61, Issue 11

sp. nov., isolated from healthy infant faeces Free

Abstract

Strains HM2-1 and HM2-2 were isolated from the faeces of a healthy infant and were characterized by determining their phenotypic and biochemical features and phylogenetic positions based on partial 16S rRNA gene sequence analysis. They were Gram-positive, obligately anaerobic, non-spore-forming, non-gas-producing, and catalase-negative non-motile rods. They did not grow at 15 or 45 °C in anaerobic bacterial culture medium, and their DNA G+C content was in the range 56–59 mol%. In enzyme activity tests, strains HM2-1 and HM2-2 were positive for α/β-galactosidases and α/β-glucosidases but negative for β-glucuronidase and cystine arylamidase. An analysis of the cell-wall composition of strains HM2-1 and HM2-2 revealed the presence of glutamic acid, alanine and lysine. The presence of fructose-6-phosphate phosphoketolase shows that isolates HM2-1 and HM2-2 are members of the genus . These two isolates belong to the same species of the genus . Strain HM2-2 was found to be related to JCM 1194 (97.4 % 16S rRNA gene sequence identity: 1480/1520 bp), JCM 1200 (97.2 %: 1472/1514 bp), ATCC 27534 (96.7 %: 1459/1509 bp) and ATCC 27535 (96.5 %: 1462/1515 bp). The predominant cellular fatty acids of strains HM2-1 and HM2-2 were 16 : 0 and 18 : 1ω9, with proportions greater than 18 % of the total. Phylogenetic analyses involving phenotypic characterization, DNA–DNA hybridization and partial 16S rRNA gene sequencing proves that the strains represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is HM2-2 ( = JCM 15439  = DSM 21854).

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2011-11-01
2025-01-25
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Bifidobacterium kashiwanohense sp. nov., isolated from healthy infant faeces
Int J Syst Evol Microbiol 61, 2610 (2011); https://doi.org/10.1099/ijs.0.024521-0
/content/journal/ijsem/10.1099/ijs.0.024521-0
/content/journal/ijsem/10.1099/ijs.0.024521-0
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