In several trials comparing alcohol-based solutions with antimicrobial detergents, alcohol reduced bacterial counts on hands to a greater extent than washing hands with soaps or detergents containing hexachlorophene, povidone-iodine, CHG(CHG) or triclosan. In a cross-over study comparing plain soap with one containing 4% CHG, unexpectedly, the latter showed higher final CFU counts after use of CHG-soap compared with plain soap, but the comparative CFU log reduction was not provided to permit conclusions concerning relative efficacy.