Abstract
The aim of this study is to evaluate the in vitro antimicrobial activity of plant extracts and chemical fractions of Sideroxylon obtusifolium T.D. Penn on Streptococcus mutans, Streptococcus oralis, Streptococcus salivarius, Streptococcus parasanguinis, and Candida albicans as well as to identify the chemical classes found in the bioactive extracts possessing better activity. Freeze-dried hydroalcoholic extracts of the bark and leaves (LC and LF respectively) and ethanol extracts of bark and leaves (EC and EF respectively) of S. obtusifolium were assessed for antimicrobial potential by determining the minimum inhibitory concentration (MIC), minimum bactericidal concentration, and minimum fungicidal concentration (MFC). The tests were performed by microdilu-tion method (in triplicate) in three independent experiments. Phytochemical characterization was performed by quantification of total polyphenols, total flavonoids, and condensed tannins. The EC extract presented weak antimicrobial potential on the growth of S. mutans (MIC = 1000 μg/mL); all extracts showed moderate inhibitory activity on the growth of C. albicans (MIC = 500 μg/mL). The dichloromethane and n-butanol fractions of LF extracts showed moderate growth inhibitory a...Continue Reading
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