ANTIBACTERIAL EFFECT OF CATECHIN EXTRACTED FROM GREEN TEA LEAVES

Abstract

Catechin is a compound of a number of polyphenols extracted from green tea leaves (Camellia sinensis L.) and plays an important role in the biological activity of tea. Catechins include: (+) -Catechin, (-)-Epicatechin (EC), (-)-Epigallocatechin (EGC), (-)-Epicatechin Galate (ECG) and (-)-Epigallocatechin Galate (EGCG). Previous studies have shown that Catechin has antimicrobial, antioxidant activity and is effective in the prevention and treatment of many types of cancers. In this study, the microbial resistance of tea leaf extract catechin (var TB14) was evaluated in the tea area of Bao Loc, Lam Dong. The results showed that catechins were resistant to gram-positive strains such as Staphylococus aureus, Bacillus cereus, Rhodococus equi, and gram-negative strains such as Escherichia coli, Citrobacter freundii, Proteus mirabils, Salmonella enterica. In general, catechins are more gram-positive than gram-negative organisms.