Antibacterial activities of green tea crude extracts and synergistic effects of epigallocatechingallate (EGCG) with gentamicin against MDR pathogens

Heliyon
Md Anowar Khasru ParvezMohammad Hossain Shariare

Abstract

Plant extracts and their purified compounds were examined for synergistic antimicrobial activity using selected multi-drug resistant (MDR) pathogens. The study aims to investigate the antibacterial activity of green tea (Camellia sinensis) and its purified compound epigallocatechingallate (EGCG). The synergistic relation of the compound with antibiotic was detected against selected potential Gram positive and Gram negative pathogens. Staphylococcus aureus and Escherichia coli were used as test pathogens which were resistant to different groups of antibiotics. After collection of fresh green tea leaves, samples were washed and air dried. EGCG is one of the bioactive compounds and was separated from tea plant. Antibacterial activity of EGCG and crude extracts of green tea were done by microdilution method (minimum inhibitory concentration and minimum bactericidal concentration). The synergistic effect of EGCG and gentamicin was determined. MIC value of green tea extract was found at 125 μg/mL in case of MDR E. coli, MDR S. aureus and their reference strains and MBC at 500 μg/mL against S. aureus. No MBC value was found against E. coli. EGCG showed better activity on Gram positive pathogen compared to that of Gram negative. MBC va...Continue Reading

Citations

Jun 9, 2020·International Journal for Parasitology. Drugs and Drug Resistance·Lenu B FakaeHany M Elsheikha
Oct 5, 2021·Critical Reviews in Food Science and Nutrition·Ramkumar SamynathanJosé M Lorenzo

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