Comparison of antibacterial activity of green tea and black tea: An in vitro study.

Rathinavelu, Pradeep Kumar; Thangavelu, Lakshmi

Aim: To determine the effect of extracts of green tea and black tea on the growth of Streptococcus mutans. Objectives: To assess the anti-microbial activity of green tea on Streptococcus mutans. To assess the anti-microbial activity of black tea on Streptococcus mutans. To compare the Anti-microbial effect of these extracts with that of 0.2% chlorhexidine mouthwash. Materials and Method: Ethanol(100% w/v) and Methanol(100% w/v) were used to prepare the crude organic extracts of the tea. Distilled water was used to prepare the aqueous extracts with concentrations of 100%. The strains of streptococcus mutans were taken. Mutans media was used. The diameter of the zones of inhibited growth was measured to the nearest whole millimeter. Result: Zone of inhibition is found to be 12 mm in aqueous extract of black tea and 20 mm for green tea, while the zone of inhibition of chlorhexidine is 22mm. The results of the present study strongly suggest that certain components of tea exert a significant anticariogenic effect by virtue of their inhibitory activity against streptococcus mutans.

GREEN tea; STREPTOCOCCUS mutans; TEA; TEA extracts; IN vitro studies; DISTILLED water; WATER use

Drug Invention Today, 2019, Vol 12, Issue 4, p836

0975-7619

Academic Journal