Results: The results showed that the inhibition zone diameter of green tea extracts for S. aureus ATCC 25923 and MRSA were (18.970依0.287) mm, and (19.130依0.250) mm respectively. While the hinhibition zone diameter for P. aeruginosa ATCC 27853 and MDR-P. aeruginosa were (17.550依0.393) mm and (17.670依0.398) mm respectively. The MIC of green tea extracts against S. aureus ATCC 25923 and MRSA were 400 µg/mL and 400 µg/mL, respectively, whereas the MIC for P. aeruginosa ATCC 27853 and MDR-P. aeruginosa were 800 µg/mL, and 800 µg/mL, respectively.