Comparative in vitro antioxidant evaluation of different extracts of Camellia sinensis leaves from different geographical locations.

Abstract Introduction The present study was conducted to assess and compare the in vitro antibacterial property of four different solvent extracts from Camellia sinensis (tea) leaves collected form five different geographical regions of India. Methods All the extracts at the concentration of 4 mg/ml was tested for their in vitro antibacterial potential by cup plate method against Bacillus subtilis , Staphylococcus aureus , Escherichia coli and Staphylococcus epidermidis . Results All the test tea extracts were found to exhibit remarkable antibacterial effect except against S. aureus . The tea sample form Assam was found to be the most active. Conclusion The marked and differential antibacterial effect of C. sinensis leaf from different Indian locations was plausibly due to geographical variations in chemical constituents especially polyphenol contents of C. sinensis leaf.