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Int J Syst Evol Microbiol 53 (2003), 2027-2031; DOI  10.1099/ijs.0.02645-0
© 2003 International Union of Microbiological Societies

Corynebacterium suicordis sp. nov., from pigs

A. I. Vela1, A. Mateos1, M. D. Collins2, V. Briones1, R. A. Hutson2, L. Domínguez1 and J. F. Fernández-Garayzábal1

1 Departamento de Patología Animal I (Sanidad Animal), Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain
2 School of Food Biosciences, University of Reading, Reading RG6 6AP, UK

Correspondence
J. F. Fernández-Garayzábal
garayzab{at}vet.sim.ucm.es

Nineteen strains of Gram-positive, non-motile, non-spore-forming, catalase-positive, rod-shaped bacteria isolated from pigs were characterized by using biochemical, molecular chemical and molecular genetic methods. Two distinct groups of organisms were discerned, based on their colonial morphology, CAMP (Christie–Atkins–Munch-Petersen) reaction and numerical profile by using the API Coryne system. The first group (13 strains) gave a doubtful discrimination between Corynebacterium striatum and Corynebacterium amycolatum, whilst the second group (six strains) were identified tentatively as Corynebacterium urealyticum. Comparative 16S rRNA gene sequencing studies demonstrated that all of the isolates belonged phylogenetically to the genus Corynebacterium. The first group of organisms was highly similar to Corynebacterium testudinoris with respect to 16S rRNA gene sequences and physiological characteristics, whereas the remaining six isolates formed a hitherto unknown subline within the genus, associated with a small subcluster of species that included Corynebacterium auriscanis and its close relatives. The unknown Corynebacterium sp. was distinguished readily from these and other species of the genus by biochemical tests. Based on both phenotypic and phylogenetic evidence, it is proposed that the new isolates from pigs should be classified as a novel species, Corynebacterium suicordis sp. nov. The type strain is P81/02T (=CECT 5724T=CCUG 46963T).

Abbreviations: CAMP, Christie–Atkins–Munch-Petersen

Published online ahead of print on 13 June 2003 as DOI 10.1099/ijs.0.02645-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Corynebacterium suicordis strain CECT 5724T is AJ504424.

A full version of the phylogenetic tree is available as supplementary material in IJSEM Online.




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