In the treatment of bedsores, washing of the bedsore region is thought to result in early healing, and it has been reported that the effect is further enhanced when green tea is used in the irrigation solution. Accordingly, in order to elucidate bacteriologically the effectiveness of washing with green tea, a comparison of the antibacterial and bactericidal effect of green tea on Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus ("MRSA"), which are representative microbes present in bedsores, was conducted using various concentrations of green tea. The results of this comparison of antibacterial effectiveness depending on differences in the concentration of green tea indicated an antibacterial effect on MRSA at a concentration of approximately 4 times that of green tea for ordinary consumption. With regard to Pseudomonas aeruginosa, the possibility of an inhibitive effect was indicated when the concentration of the green tea was raised to an approximately 100-fold concentration
