Streptococcus porcorum sp. nov., isolated from domestic and wild pigs
Investigation article published in International Journal of Systematic and Evolutionary Microbiology
July 1st, 2011
Seven isolates of an unidentified Gram-positive, catalase-negative coccus-shaped organism isolated from domestic and wild pigs, were characterized by phenotypic and molecular genetic methods. Based on cellular morphology and biochemical criteria the isolates were tentatively assigned to the genus Streptococcus, although the organisms did not appear to correspond to any recognised species. Comparative 16S rRNA gene sequencing showed that the unknown bacterium was phylogenetically closely related to, but distinct from Streptococcus suis (97.5% 16S rRNA gene sequence similarity). The rpoB and sodA sequence analysis showed minimal interspecies divergence values with its close 16S rRNA phylogenetically relatives of 13.8% and 18.6%, respectively. DNA-DNA hybridization of the unidentified organism demonstrated 8-18% reassociation with S. suis NCTC 10234T. The novel bacterium was distinguished from S. suis and other Streptococcus species using biochemical tests. On the basis of phenotypic and phylogenetic evidence, it is proposed that the unknown isolates from domestic and wild animals be classified as a new species of the genus Streptococcus, Streptococcus porcorum sp. nov. The type strain of S. porcorum is 682-03T (CCUG 58479T =CECT 7593T)
Vela AI., Sanchez V., Mentaberre G., Lavin S., Dominguez L. and Fernandez-Garayzabal JF..
 | Servicio de Identificación y Caracterización Microbiana (ICM). Centro de Vigilancia Sanitaria Veterinaria (VISAVET). Universidad Complutense (UCM). |
| Departamento de Sanidad Animal. Facultad de Veterinaria. Universidad Complutense (UCM). |
 | Departamento de Medicina y Cirurgia Animal. Facultad de Veterinaria. Universitat Autònoma de Barcelona (UAB). |
