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Int J Syst Evol Microbiol 57 (2007), 1291-1294; DOI  10.1099/ijs.0.64537-0
© 2007 International Union of Microbiological Societies

Aerococcus suis sp. nov., isolated from clinical specimens from swine

A. I. Vela1, N. García1, M. V. Latre2, A. Casamayor1, C. Sánchez-Porro3, V. Briones1, A. Ventosa3, L. Domínguez1 and J. F. Fernández-Garayzábal1

1 Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain
2 Departamento de Patología Animal, Facultad de Veterinaria, Universidad de Zaragoza, Zaragoza, Spain
3 Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain

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

Biochemical and molecular genetic studies were performed for five isolates of unknown Gram-positive, catalase-negative, cocci-shaped micro-organisms obtained from clinical samples from pigs. The micro-organisms were tentatively identified as Aerococcus species on the basis of the results from cellular morphological and biochemical tests. 16S rRNA gene sequencing studies confirmed the provisional identification of the isolates as members of the genus Aerococcus, but the micro-organism did not correspond to any recognized species of this genus. The nearest phylogenetic relatives of these unknown cocci isolated from pigs were Aerococcus viridans (95.9 % 16S rRNA gene sequence similarity) and Aerococcus urinaeequi (95.8 %). The unknown bacterium, however, was distinguishable from these two species and from other animal aerococci by using biochemical tests. On the basis of both phenotypic and phylogenetic findings, the isolates represent a novel species of the genus Aerococcus, for which the name Aerococcus suis sp. nov. is proposed. The type strain is 1821/02T (=CECT 7139T=CCUG 52530T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain 1821/02T is AM230658.

A full version of the neighbour-joining phylogenetic tree shown in Fig. 1 is available as a supplementary figure with the online version of this paper.






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