Polyphenols from four medicinal plants of Burkina Faso, Combretum micranthum, Khaya senegalensis, Pterocarpus
erinaceus and Sida acuta, were screened for their antioxidant and antimicrobial activities against pathogenic bacteria.
The medicinal plants displayed different polyphenols contents and antioxidant activities. The bark of P. erinaceus had
the highest antioxidant activity. Some microorganisms were susceptible to polyphenol extracts with minimal
bactericidal concentration values between 20 and 2000 g/ml while other microorganisms appeared to be resistant to
the extracts. Microbicide and microbiostatic activities of the extracts were dependent on the type of strains. Results
suggest that these plants are not only interesting sources for antimicrobial activities but also potential sources of
phenolic antioxidants

Antioxidants, polyphenols, antimicrobials, medicinal plants.