Inhibitory effect of BLIS K12 on germ tube formation of C. albicans cultured with different doses of S. salivarius K12 for 3 h at 37°C in 5% CO2 in air. Starting concentrations of Streptococcus salivarius K12 freeze-dried material were control (a), 0.12 mg/ml (b), 0.23 mg/ml (c), 0.47 mg/ml (d), 0.94 mg/ml (e), 1.88 mg/ml (f), 3.75 mg/ml (g), 7.5 mg/ml (h), 15 mg/ml (i), and 30 mg/ml (j) (1.2 × 107 to 3 × 109 CFU/ml).