Fig 1.

Phylogenetic trees from 16S rRNA gene (A) and rpoB gene (B) sequence data of representative strains belonging to the Streptococcus porcinus/Streptococcus pseudoporcinus complex and other select species of Streptococcus. GenBank accession numbers are given in parentheses. The evolutionary history was inferred by using the neighbor-joining method. The associated taxa clustered together in 60% or more of the 1,000 replicate trees. Enterococcus faecalis was used as the outgroup sequence. The scale bar indicates the units of the number of base substitutions per site.