Phylogenetic analysis of isolated strains of the S. bovis group and other major streptococcal species based on complete 16S rRNA gene sequences. The multiple sequence alignment of 16S rRNA genes was performed using ClustalW. The conserved tree was constructed using the neighbor-joining method. Bootstrap values are shown above each branch. All 16S rRNA gene sequences were derived from the NCBI and validated using genome sequences. The strains with complete genomes are marked with a star to the right of the species name. Staphylococcus aureus subsp. aureus MRSA252 was included as an out-group. The strains in red were isolated in this study.