Abstract：
BACKGROUND:Stethoscopes may serve as vehicles for transmission of bacteria among patients. The aim of this study was to assess the efficacy of antimicrobial copper surfaces to reduce the bacterial concentration associated with stethoscope surfaces. METHODS:A structured prospective trial involving 21 health care providers was conducted at a pediatric emergency division (ED) (n = 14) and an adult medical intensive care unit located in tertiary care facilities (n = 7). Four surfaces common to a stethoscope and a facsimile instrument fabricated from U.S. Environmental Protection Agency-registered antimicrobial copper alloys (AMCus) were assessed for total aerobic colony counts (ACCs), methicillin-resistant Staphylococcus aureus, gram-negative bacteria, and vancomycin-resistant enterococci for 90 days. RESULTS:The mean ACCs collectively recovered from all stethoscope surfaces fabricated from the AMCus were found to carry significantly lower concentrations of bacteria (pediatric ED, 11.7 vs 127.1 colony forming units [CFU]/cm2, P < .00001) than their control equivalents. This observation was independent of health care provider or infection control practices. Absence of recovery of bacteria from the AMCu surfaces (66.3%) was significantly higher (P < .00001) than the control surfaces (22.4%). The urethane rim common to the stethoscopes was the most heavily burdened surface; mean concentrations exceeded the health care-associated infection acquisition concentration (5 CFU/cm2) by at least 25×, supporting that the stethoscope warrants consideration in plans mitigating microbial cross-transmission during patient care. CONCLUSIONS:Stethoscope surfaces fabricated with AMCus were consistently found to harbor fewer bacteria.
journal_name
Am J Infect Controljournal_title
American journal of infection controlauthors
Schmidt MG,Tuuri RE,Dharsee A,Attaway HH,Fairey SE,Borg KT,Salgado CD,Hirsch BEdoi
10.1016/j.ajic.2017.01.030subject
Has Abstractpub_date
2017-06-01 00:00:00pages
642-647issue
6eissn
0196-6553issn
1527-3296pii
S0196-6553(17)30094-9journal_volume
45pub_type
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