B. Chowdhury et S. Mukhopadhyay, ANTIBACTERIAL ACTIVITY OF TEA AND COFFEE AGAINST STREPTOCOCCUS AND MICROCOCCUS SPECIES, Medical science research, 24(11), 1996, pp. 771-772
Extracts of black tea, green tea and coffee inhibited the growth of va
rious species of Streptococcus and Micrococcus. Tea and coffee also sh
owed bactericidal activity against Streptococcus pneumoniae and Microc
occus luteus. Heat treatment of extracts did not affect the inhibitory
or bactericidal effects, indicating the unlikely involvement of prote
in(s) in bactericidal activity.