Evaluation of a benzalkonium chloride hand sanitizer in reducing transient Staphylococcus aureus bacterial skin contamination in health care workers

• Published in: American journal of infection control Vol. 48; no. 5; pp. 522 - 526
• Main Authors: Bondurant, Sidney, McKinney, Tanya, Bondurant, Liza, Fitzpatrick, Lisa
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.05.2020
• Subjects: Adult; Alcohol sanitizer; Anti-Infective Agents, Local - pharmacology; Antibacterial persistence; Bacterial Load; Benzalkonium chloride; Benzalkonium Compounds - pharmacology; Ethanol - pharmacology; Female; Hand - microbiology; Hand Disinfection; Hand hygiene; Hand Sanitizers - chemistry; Hand Sanitizers - pharmacology; Health Personnel; Humans; Male; Nosocomial infection; Skin - microbiology; Soaps - chemistry; Soaps - pharmacology; Staphylococcal Infections - prevention & control; Staphylococcus aureus; Staphylococcus aureus - drug effects; Nosocomial infection; Benzalkonium chloride; Hand hygiene; Staphylococcus aureus; Antibacterial persistence; Alcohol sanitizer
• ISSN: 0196-6553; 1527-3296; 1527-3296
• DOI: 10.1016/j.ajic.2019.08.030

•A benzalkonium hand sanitizer significaltly reduced S. aureus versus an ethanol sanitizer.•The effectiveness of the benzalkonium chloride may be due to its skin persistence. This study was performed to evaluate the effectiveness of a new commercially available hand sanitizer using 0.12% benzalkonium chloride (BZK) as the active ingredient in reducing transient skin contamination with Staphylococcus aureus in health care workers (HCWs), as compared with the effectiveness of a 70% ethanol-based hand sanitizer. Fingertip touch culture plates were obtained from 40 HCWs in which all HCWs used antimicrobial soap containing 0.6% chloroxylenol for handwashing according to the Centers for Disease Control and Prevention guidelines for the entire study, while continuing to use the 70% ethanol-based hand sanitizer according to the Centers for Disease Control and Prevention guidelines for the first week. After the first week, the test subjects used the BZK hand sanitizer in place of the ethanol sanitizer. A paired sample t test was conducted to compare the mean bacterial colonies grown from HCWs fingertips during the use of the BZK and ethanol hand sanitizer. The results showed a significant reduction in total bacterial colony counts of S aureus during the week of BZK use as compared with the week of 70% ethanol sanitizer use. There was a significant decrease in transient S aureus on the fingertips of HCWs in the BZK hand sanitizer use week as compared with the 70% ethanol hand sanitizer use week.