Results: The leaf extracts of Psidium guajava, Phyllanthus niruri, Ehretia microphylla
and Piper betle (P. betle) showed antibacterial activity against the Gram-positive methicillin-
resistant Staphylococcus aureus and vancomycin-resistant Enterococcus. P. betle
showed the highest antibacterial activity for these bacteria in the disk diffusion (16–
33 mm inhibition diameter),