Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 63, Issue -, Pages 2019-2024Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.045591-0
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A polyphasic taxonomic study was performed on two previously unidentified Arcanobacterium-like Gram-positive strains isolated from harbour seals. Comparative 16S rRNA gene sequencing showed that both bacteria belonged to the genus Arcanobacterium and were most closely related to Arcanobacterium haemolyticum CIP 103370(T) (98.4 % 16S rRNA gene sequence similarity), A. canis P6775(T) (97.4 %), A. phocae DSM 10002(T) (97.4 %), A. pluranimalium M430/94/2(T) (95.7%) and A. hippocoleae CCUG 44697(T) (95.5 %). The presence of the major menaquinone MK-9(H-4) supported the affiliation of the isolates with the genus Arcanobacterium. The polar lipid profile consisted of major amounts of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, phosphatidylinositol mannoside, an unidentified phospholipid and two unidentified glycolipids. The major fatty acids were C-16:0, C-18:0, C-18:1 omega 9c and summed feature 5 (comprising C-18:2 omega 6,9c and/or anteiso-C-18:0). Physiological and biochemical tests clearly distinguished the isolates from other members of the genus Arcanobacterium. Based on the common origin and various physiological properties comparable to those of A. phocae, it is proposed that the isolates are classified as members of a novel species with the name Arcanobacterium phocisimile sp. nov. The type strain is 2698(T) (=LMG 27073(T) =CCM 8430(T)).
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