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

Table 4

MBC values of ethanol extract of propolis for mutans streptococci (𝑛=17) and Lactobacillus spp. (𝑛=17) isolated from human saliva.

Cariogenic pathogens	Mean MBC ± SD (mg/mL)	Min MBC (mg/mL)	Max MBC (mg/mL)	MBC50 (mg/mL)	MBC90 (mg/mL)	% Susceptible*
MS	9.01 ± 3.85	3.13	12.5	12.5	12.5	100
LB	5.91 ± 3.62	0.39	12.5	6.25	12.5	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.