• Dr. Pranita Gulhane
• Ms. Asmita Phopate

Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the tea plant Camellia sinensis. The present research is conducted to study the antibacterial activity of Green tea and Black tea against bacterial pathogens such as S. aureus and E.coli. It is concluded that ethanolic and methanolic extracts of both green tea and black tea were found to be effective against all the tested bacterial pathogens. On the other hand, aqueous extract of green tea was effective against all the tested bacterial pathogens but aqueous extract of black tea was found to be effective only against 40% bacterial pathogens. When the bacterial pathogens were tested for antibiotic resistance profile, it was found that all S.aureus were sensitive (100% each) to Erythromycin, Gentamicin, Penicillin and Tetracycline while resistant to Oxacillin. Antibiotic resistance profile of E.coli showed that all E.coli were sensitive to Tobramycin followed by 80% was sensitive to Chloramphenicol, Trimethoprim and Vancomycin while all E.coli were resistant to Ofloxacin. Aqueous, ethanolic and methanolic tea extracts were checked for the presence of alkaloids, tannins, flavonoids, reducing sugars, saponins, cardiac glycosides and steroids. Qualitative analysis revealed that all the extracts of green tea and black tea showed the presence of flavonoids, tannins, alkaloids, saponins, reducing sugars and cardiac glycosides but the steroids were present only in black tea.

"Comparative Account on Antibacterial Activity and Phytochemical Analysis of Green Tea and Black Tea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 5, page no.i412-i418, May-2023, Available :http://www.jetir.org/papers/JETIR2305879.pdf

"Comparative Account on Antibacterial Activity and Phytochemical Analysis of Green Tea and Black Tea", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 5, page no. ppi412-i418, May-2023, Available at : http://www.jetir.org/papers/JETIR2305879.pdf