Fig. 4

The percentages of oral streptococci (black), anaerobes (gray) and others (light gray) detected by the bacterial floral analysis of 16S ribosomal RNA gene in each bronchoalveolar lavage fluid sample according to risks for aspiration and ECOG-PS. The percentages of oral streptococci (black), anaerobes (gray) and others (light gray) detected by the bacterial floral analysis of 16S rRNA gene in each bronchoalveolar lavage fluid sample in patients with (a and c) or without (b and d) risks for aspiration, and those in patients with ECOG-PS of ≥3 (e and g) or ≤2 (f and h). a, b, e and f focus on the detection rate of oral streptococci (black) in each patient, and c, d, g and h focus on the detection rate of anaerobes (gray) in each patient. 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