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Evaluation of the Skin Disinfecting Activity and Cumulative Effect of Chlorhexidine and Triclosan Handwash Preparations on Hands Artificially Contaminated with Serratia marcescens

Published online by Cambridge University Press:  02 January 2015

C.A. Bartzokas*
Affiliation:
University Department of Medical Microbiology, Royal Liverpool Hospital, Liverpool, United Kingdom
J.E. Corkill
Affiliation:
University Department of Medical Microbiology, Royal Liverpool Hospital, Liverpool, United Kingdom
T. Makin
Affiliation:
University Department of Medical Microbiology, Royal Liverpool Hospital, Liverpool, United Kingdom
*
University Department of Clinical Microbiology, Clatterbridge Hospital, Bebington, Wirral, L63 4JY, United Kingdom

Abstract

The initial and cumulative efficacy of two antiseptic handwash preparations in eliminating Serratia marcescens from hands was evaluated on volunteers. Two antiseptics with persistent skin antibacterial activity, 4% chlorhexidine gluconate in detergent and 1.5% triclosan in natural soap, were studied in a new protocol designed according to Food and Drug Administration guidelines. After a single handwash, both preparations exhibited a degerming action statistically superior to the mechanical elimination of the marker organism that was achieved by the nonmedicated controls. Following a further nine hand recontamination sequence with 109 colony-forming units (cfu)/mL S marcescens (mean pre-disinfection baseline, log10 6.6), the efficacy of chlorhexidine and triclosan was significantly augmented: the mean log10 reduction factors were 4.15 and 3.78, respectively. In the absence of internationally accepted testing standards for antiseptic handwash products, the significance of protocol variables is discussed. The advantages to preventative microbiology of antiseptics with persistent skin antibacterial activity are highlighted.

Type
Original Articles
Copyright
Copyright © The Society for Healthcare Epidemiology of America 1987

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