Piper aduncum L. is a plant with several biological properties such as antimicrobial activity, which is mainly associated with the action of its essential oil rich in dilapiolle. In recent years, the occurrence of skin infections caused by bacteria and fungi increased considered shape. Thus, this study aimed to evaluate the antimicrobial activity of essential oil of P. aduncum (OEPA) and dilapiolle, its major constituent, against pathogenic skin micro-organisms and their attachments. The antimicrobial activity was performed using the microdilution method and Forming Units count Cologne (UFC) for determining the Minimum Inhibitory Concentration (MIC), the Bactericidal Concentration Minimum (CBM) and Minimum Fungicidal Concentration (CFM). These plant compounds were tested against the filamentous fungi dermatophytes (FFD) and not dermatophyte (FFND), gram-positive bacteria and yeast. The results showed Trichophyton mentagrophytes front (ATCC and clinical isolate), MIC values of 500μg.mL-1 for OEPA and dilapiolle and CFM 1500 and 1000 µg.mL-1 , respectively. For clinical isolates of Trichophyton rubrum and Epidermophyton floccosum the MIC values of 500μg.mL-1 and CFM 1500μg.mL-1 , were similar for the two compounds as well as Microsporum canis and Microsporum gypseum with MIC values of 250μg.mL-1 and CFM 500μg.mL-1 . The Aspergillus fumigatus ATCC FFND showed an MIC of 3.9μg.mL-1 and 7.8 μg.mL-1 and the clinical isolate strain MIC of 3.9μg.mL-1 and CFM 15.6 μg.mL-1 for both. However showed no activity against Candida albicans and the yeast bacteria Staphylococcus aureus in the concentrations used.
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