The properties of green tea which inhibit bacterial
growth are mainly related to their polyphenolic
components including epicatechin, epicatechin gallate,
epigallocatechin, and epigallocatechin gallate against
various Gram-positive and Gram-negative bacteria[22,23].
Green tea was also reported to have a synergistic effect
with β-lactam antibiotics against MRSA[24-28], It was also
reported that the main component of tea polyphenols,
epigallocatechin gallate can reverse methicillin
resistance of MRSA by inhibiting the synthesis of PBP2[29],
Epigallocatechin gallate not only increases the activity
of β-lactams but also increases the activity of non-β-
lactam cell wall biosynthesis inhibitors[26].