“…14,15,17,18,19 In this study, broth microdilution was conducted to determine the MIC of brown propolis against E. faecalis, which was 1000 mg/mL. By contrast, lower MIC values against E. faecalis were observed for other types of propolis, such as 4 mg/mL of the Turkey TB propolis, 20 340 mg/mL of the Iran propolis, 19 and higher values of 6,425 mg/mL for the propolis from southern Brazil. 21 In addition, different MIC values were observed for Brazilian green propolis against several microorganisms, including Peptostreptococcus anaerobius (20.8 mg/mL), Porphyromonas gingivalis (294.4 mg/mL), Fusobacterium nucleatum (256 mg/mL), and Prevotella melaninogenica (204.8 mg/mL).…”