Fig. 2
Correlation of adherence of S. salivarius K12 and pneumococcal serotype 6A (a) and 19F (b) adherence to pharyngeal epithelial cells. Adherence of S. salivarius and pneumococci to D562 monolayers was determined following pre-incubation for 1 h with high (~1.6 × 107 CFU), medium (~1.6 × 106 CFU), or low (~1.6 × 105 CFU) doses of S. salivarius K12 and subsequent incubation with ~1.4 × 106 CFU pneumococci for 1 h. r = Spearman rank correlation coefficient