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An In Vivo Method for the Detection of Residual Antimicrobial Activity on Human Skin
( Edward Eigen ),( Aladar Legenyei ),( Sidney Weiss ) 대한화장품학회 1975 대한화장품학회지 Vol.5 No.1
Synopsis-A new IN VIVO METHOD has been devised, which realistically estimates RESIDUAL ANTIMICROBIAL ACTIVITY on skin. Residual activity is measured by placing a small petri-type dish containing a DIFFERENTIAL MEDIUM seeded with a known amount of one specific organism on a treated site for 4 hours. The dish is then incubated for 48 hours, and the colonies, which represent survivors, are counted. These counts are compared with counts obtained in the same manner from an area treated with a PLACEBO. The duration of antimicrobial activity on the skin is followed in this manner over a period of several days. Using this technique, it has been possible to demonstrate differences in residual activity remaining on the skin after application of liquid antimicrobial skin cleansers and antimicrobial soap followed by thorough rinsing with water.