258. Efficacy of a Low-Intensity Ultraviolet-C Radiation Device for automated decontamination of stethoscopes
Session: Poster Abstract Session: HAI: Environment and Device Cleaning
Thursday, October 27, 2016
Room: Poster Hall
  • IDWeek 2016-Angel Stethoscope.pdf (394.2 kB)
  • Background:

    Stethoscopes are potential vectors for transmission of healthcare-associated pathogens because they frequently contact patients’ skin but are not routinely cleaned between examinations. We tested the efficacy of a low-intensity UV-C device for decontamination of stethoscopes, including those designated for use in isolation rooms.


    The UV Angel system is a small portable device containing a single 3.5 inch long cold cathold UV-C lamp that provides 6-minute decontamination cycles to small areas of exposure and includes sensors that abort the cycle if motion is detected within the area of UV-C exposure. We examined the efficacy of the device against methicillin-resistant Staphylococcus aureus (MRSA), carbapenem-resistant Escherichia coli, and C. difficile spores inoculated on stethoscopes. Log reductions were calculated by comparing recovery from treated stethoscopes versus untreated controls. We also cultured 50 in-use stethoscopes before and after 1 cycle of decontamination.


    Recovery of MRSA and E. coli was reduced by greater than 3 logs with 1 6-minute cycle, whereas 4 cycles (24 minutes total) were required to achieve >1 log reduction in C. difficile spores. Based on indicator strips, there was no detectable UV-C penetration in areas outside the area of exposure directly beneath the lamp. Use of the device significantly reduced aerobic colony counts and recovery of healthcare-associated pathogens from in use stethoscopes (P<0.05 for both comparisons).


    The low-intensity UV-C device could provide an effective, automated method for decontamination of stethoscopes.

    Annette Jencson, BSMT(ASCP)SM, CIC1, Sreelatha Koganti, MD1, Heba Alhmidi, MD1, Jennifer L. Cadnum, BS2, Aaron Shaikh, MSW3 and Curtis J. Donskey, MD4, (1)Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, (2)Geriatric Research Education and Clinical Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, (3)School of Medicine, Case Western Reserve University, Cleveland, OH, (4)Infectious Diseases, Case Western Reserve University, Cleveland, OH


    A. Jencson, None

    S. Koganti, None

    H. Alhmidi, None

    J. L. Cadnum, None

    A. Shaikh, None

    C. J. Donskey, None

    Findings in the abstracts are embargoed until 12:01 a.m. CDT, Wednesday Oct. 26th with the exception of research findings presented at the IDWeek press conferences.