Abstract
Objectives: The object of this study was to observe the in vitro antibacterial effects of Wandae-tang extracts and combination of Wandae-tang extracts and Clindamycin against Gardnerella vaginalis ATCC14018. Methods: Antibacterial activities against Gardnerella vaginalis ATCC14018 of Wandae-tang extracts were detected using standard agar microdilution methods. In addition, the effects on the bacterial growth curve were also monitored at minimal inhibitory concentration(MIC) and levels. The combination effects of Wandae-tang extracts with Clindamycin were observed by Checkerboard microtiter assay, and the effects of bacterial growth curve was treated with Wandae-tang extracts MIC+Clindamycin MIC, 1/2 MIC and 1/4 MIC, respectively. Results: MIC of Wandae-tang extracts and Clindamycin against Gardnerella vaginalis ATCC14018 were detected as (0.782~3.125) and (0.004~0.016) . In addition, Clindamycin and Wandae-tang extracts were also showed marked dosage-dependent inhibition of bacterial growth, and more dramatical inhibitions were detected in Clindamycin+Wandae-tang extracts MIC treatment. Fractional inhibitory concentration index in combination of Wandae-tang extracts and Clindamycin were detected as (0.250~0.375) at Checkerboard microtiter assay. Conclusions: The results obtained in this study suggest that Wandae-tang extracts showed antibacterial effects against Gardnerella vaginalis ATCC14018, and they also showed dosage-dependent inhibitory effects on the bacterial growth. In addition, combination treatment of Wandae-tang extracts with Clindamycin showed more synergistically potent inhibitory effects on the growth of Gardnerella vaginalis.
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