Stenotrophomonas maltophilia is a Gram-negative bacterium that acts as an opportunistic pathogen and is frequently associated with pneumonia and bacteremia. One of the bio-pharmaceutical plants with potential activity against Stenotrophomonas maltophilia infection is karamunting (Rhodomyrtus tomentosa (Aiton) Hassk.), which is widely found in Southeast Asia. The use of karamunting leaf extract …