Fig. 5

The differences of the percentages of the most detected bacterial phylotypes determined by the bacterial floral analysis of 16S ribosomal RNA gene according to ECOG-PS. The percentages of the most detected bacterial phylotypes by the bacterial floral analysis of 16S rRNA gene in patients with ECOG-PS ≥3 (a) included significantly more oral streptococci than those in patients with ECOG-PS ≤2 (b) (P < 0.001). All members of the Streptococcus mutans and S. mitis groups, the S. salivarius group, and the S. anginosus group were included as “oral streptococci” except for S. pneumoniae. Abbreviation: ECOG-PS; european cooperative oncology group performance status