Antimicrobial activity of selected extracts from Hakea salicifolia and H. sericeae (Proteaceae) against Staphylococcus aureus multiresistant strains.

摘要

The antimicrobial activity of several plant extracts obtained from aerial parts of two invasive plants, Hakea sericeae and Hakea salicifolia, was evaluated against both Gram-positive and Gram-negative bacteria, including resistant strains of Staphylococcus aureus and assayed at different minimum inhibitory concentrations (MIC), ranging between 3.5 and 500 micro g/mL. The twigs' aqueous extract showed the strongest antimicrobial activity (MIC 7.5-62 micro g/mL) against the tested methicilin and vancomycin resistant strains of S. aureus.