Viscum album L. subsp. abietis (Wiesb.) (Loranthaceae) is extensively used for treatment in traditional medicine. This plant was collected in the region of Artvin, northern Turkey. Different concentrations of n-hexane extract were tested using the agar diffusion technique against 6 bacteria (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterobacter cloacae and Proteus vulgaris), and 1 fungus (Candida albicans). | Turk J Biol 27 (2003) 255-258 © TÜB‹TAK Antimicrobial Activity of Viscum album L. subsp. abietis (Wiesb) Ömer ERTÜRK Department of Biology, Faculty of Arts and Sciences, Karadeniz Technical University, 61080, Trabzon - TURKEY Hatice KATI Department of Biology, Faculty of Arts and Sciences, Karadeniz Technical University, 61080, Trabzon - TURKEY Nurettin YAYLI Department of Chemistry, Faculty of Arts and Sciences, Karadeniz Technical University, 61080, Trabzon - TURKEY Zihni DEM‹RBA⁄ Department of Biology, Faculty of Arts and Sciences, Karadeniz Technical University, 61080, Trabzon - TURKEY Received: Abstract: Viscum album L. subsp. abietis (Wiesb.) (Loranthaceae) is extensively used for treatment in traditional medicine. This plant was collected in the region of Artvin, northern Turkey. Different concentrations of n-hexane extract were tested using the agar diffusion technique against 6 bacteria (Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterobacter cloacae and Proteus vulgaris), and 1 fungus (Candida albicans). We determined that fractions 6 and 7 of n-hexane extract of V. album subsp. abietis showed antimicrobial activity against the micro-organisms tested. Key Words: Viscum album subsp. abietis, Plant Extract, Antimicrobial Activity Viscum album L. subsp. abietis (Wiesb)’in Antimikrobiyal Aktivitesi Özet: Viscum album L. subsp. abietis (Wiesb.) (Loranthaceae) bitkisi tedavi için geleneksel t›pta yayg›n olarak kullan›lmaktad›r. Bu bitki örnekleri Türkiye’nin kuzey k›sm›nda yer alan Artvin yöresinden topland›. N-hekzan ekstrakt›n›n farkl› konsantrasyonlar› Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Enterobacter cloacae ve Proteus vulgaris bakterileri ile Candida albicans mantar›’na karfl› agar difuzyon tekni¤i kullan›larak test edildi. V. album subsp. abietis bitkisinin n-hekzan ekstrakt›n›n alt›nc› ve yedinci fraksiyonlar›n›n test edilen mikroorganizmalara karfl›