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  • Title: Characterization of the phylogenetic diversity of five novel species belonging to the genus Bifidobacterium: Bifidobacterium castoris sp. nov., Bifidobacterium callimiconis sp. nov., Bifidobacterium goeldii sp. nov., Bifidobacterium samirii sp. nov. and Bifidobacterium dolichotidis sp. nov.
    Author: Duranti S, Lugli GA, Napoli S, Anzalone R, Milani C, Mancabelli L, Alessandri G, Turroni F, Ossiprandi MC, van Sinderen D, Ventura M.
    Journal: Int J Syst Evol Microbiol; 2019 May; 69(5):1288-1298. PubMed ID: 30789326.
    Abstract:
    Five Bifidobacterium strains, i.e. 2020BT, 2028BT, 2033BT, 2034BT and 2036BT, were isolated from European beaver (Castor fiber), Goeldi's marmoset (Callimicogoeldii), black-capped squirrel monkey (Saimiriboliviensissubsp. peruviensis) and Patagonian mara (Dolichotispatagonum). All of these isolates were shown to be Gram-positive, facultative anaerobic, d-fructose 6-phosphate phosphoketolase-positive, non-motile and non-sporulating. Phylogenetic analyses based on 16S rRNA gene sequences, multilocus sequences (including hsp60, rpoB, dnaJ, dnaG and clpC genes) and the core genome revealed that bifidobacterial strains 2020BT, 2028BT, 2033BT, 2034BT and 2036BT exhibit close phylogenetic relatedness to Bifidobacterium biavatii DSM 23969T, Bifidobacterium bifidum LMG 11041T, Bifidobacterium choerinum LMG 10510T, Bifidobacterium gallicum LMG 11596T, Bifidobacterium imperatoris LMG 30297T, Bifidobacterium italicum LMG 30187T and Bifidobacterium vansinderenii LMG 30126T, respectively. Further genotyping based on the genome sequence of the isolated strains combined with phenotypic analyses, clearly show that these strains are distinct from each of the type strains of the so far recognized Bifidobacterium species. Thus, Bifidobacterium castoris sp. nov. (2020BT=LMG 30937T=CCUG 72816T), Bifidobacterium callimiconis sp. nov. (2028BT=LMG 30938T=CCUG 72814T), Bifidobacterium samirii sp. nov. (2033BT=LMG 30940T=CCUG 72817T), Bifidobacterium goeldii sp. nov. (2034BT=LMG 30939T=CCUG 72815T) and Bifidobacterium dolichotidis sp. nov. (2036BT=LMG 30941T=CCUG 72818T) are proposed as novel Bifidobacterium species.
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