“…Use of products containing propolis by humans has a long history because of its beneficial effects in many pathological processes (Burdock, 1998). In fact, numerous papers have reported a broad spectrum of biological activities such as antibiotic, antifungal, antiviral (Kujumgiev et al, 1999), antiinflammatory (Park and Kahng, 1999;Ozturk et al, 2000;Borrelli et al, 2002;Cardile et al, 2003), immunomodulatory (Bratter et al, 1999), antitumor and antioxidant effects (Scheller et al, 1990;Russo et al, 2002). The antimutagenic effect of ethanolic extract of propolis has also been demonstrated in the Salmonella microsome treated with benzo[a]pyrene, a polycyclic aromatic hydrocarbon found at high concentrations in cigarette smoke (Varanda et al, 1999).…”