“…Propolis in general contains a variety of chemical compounds such as polyphenols (flavonoid aglycones, phenolic acids, and their esters, phenolic aldehydes, alcohols, and ketones), terpenoids, steroids, amino acids, and inorganic compounds (Dimov et al, 1991;Volpert and Elstner, 1993;Moreno et al, 2000). Many biological properties, including antibacterial, (Mochida et al, 1985;Velikova et al, 2000), antifungal (Dimov et al, 1991;Murad et al, 2002), antiviral (Amoros et al, 1992;Amoros et al, 1994), anti-inflammatory (Strehl et al, 1994;Miyataka et al, 1997), antioxidant (Sun et al, 2000;Isla et al, 2001), hepatoprotective (Gonzales et al, 1995) and immunostimulating (Dimov et al, 1991) activities have been ascribed to propolis. Antibacterial activity of propolis is reported to be due to flavonoids, aromatic acids, and its esters.…”