The Antibacterial Effect of Ethanol Extract of Polish Propolis on Mutans Streptococci and Lactobacilli Isolated from Saliva

Table 2

MIC values of ethanol extract of propolis for MS (𝑛=17) and LB (𝑛=17) isolated from human saliva.

Cariogenic pathogens	Mean MIC ± SD (mg/mL)	Min MIC (mg/mL)	Max MIC (mg/mL)	MIC50 (mg/mL)	MIC90 (mg/mL)	% Susceptible bacteria*
Mutans streptococci	1.10 ± 0.45	0.39	1.56	0.78	1.56	100
Lactobacillus spp.	0.7 ± 0.29	0.20	1.56	0.78	0.78	100
Cariogenic pathogens	Mean AlamarBlue MIC ± SD (mg/mL)	Min AlamarBlue MIC (mg/mL)	Max AlamarBlue MIC (mg/mL)	AlamarBlue MIC50 (mg/mL)	AlamarBlue MIC90 (mg/mL)	% Susceptible bacteria*
Mutans streptococci	2.13 ± 1.53	0.16	6.25	1.56	3.12	100

MIC₅₀, MIC₉₀, and MIC₁₀₀—minimal inhibitory concentration needed to inhibit the growth of 50, 90, and 100% of mutans streptococci and lactobacilli, respectively.
(*) 100% of tested bacteria were susceptible to range of EEP concentrations.