Antibacterial and antifungal activities of some Quercus species growing in Turkey

In this study, antibacterial and antifungal activities of Quercus macranthera subsp. syspirensis, Q. cerris, Q. pubescens, and Q. coccifera were investigated using broth microdilution method by measuring minimum inhibitory concentrations (MICs) of the different extracts. Antimicrobial activity was determined against two Gram-positive and two Gram-negative bacteria and for three fungi. All of the extracts possessed more antifungal activity than antibacterial activity in general. Almost all extracts were found to be active against the tested Candida strains. In particular, n-BuOH extract of Q. coccifera exhibited significant activity against C. parapsilosis, with a MIC value of 4.8 μg/ml.