International Journal of Systematic and Evolutionary Microbiology, Vol 52, 617-619, Copyright © 2002 by Society for General Microbiology

Arcanobacterium hippocoleae sp. nov., from the vagina of a horse

L. Hoyles, E. Falsen, G. Foster, F. Rogerson and M. D. Collins
School of Food Biosciences, University of Reading, Whiteknights, PO Box 226, Reading RG6 6AP, UK

A polyphasic taxonomic study was performed on a previously unidentified Gram-positive, facultatively anaerobic, diphtheroid-shaped organism isolated from a vaginal discharge of a horse. Comparative 16S rRNA gene sequencing demonstrated that the strain was a member of the genus Arcanobacterium, but sequence divergence values of >4% with described species of this genus (viz: Arcanobacterium haemolyticum, Arcanobacterium bernardiae, Arcanobacterium phocae, Arcanobacterium pluranimalium and Arcanobacterium pyogenes) demonstrated that the isolate represented a novel species. The unknown bacterium was readily distinguished from other Arcanobacterium species by biochemical tests. Based on phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium be classified as Arcanobacterium hippocoleae sp. nov. The type strain of A. hippocoleae is CCUG 44697(T) (=CIP 106850(T)).

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