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Effectiveness of foam disinfectants in reducing sink-drain gram-negative bacterial colonization

Published online by Cambridge University Press:  05 December 2019

Lucas D. Jones
Affiliation:
Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, ClevelandOhio Research Service, Louis Stokes Cleveland Veterans’ Affairs Medical Center, ClevelandOhio
Thriveen S.C. Mana
Affiliation:
Research Service, Louis Stokes Cleveland Veterans’ Affairs Medical Center, ClevelandOhio Division of Infectious Diseases and HIV Medicine, Case Western Reserve University School of Medicine, ClevelandOhio
Jennifer L. Cadnum
Affiliation:
Research Service, Louis Stokes Cleveland Veterans’ Affairs Medical Center, ClevelandOhio
Annette L. Jencson
Affiliation:
Research Service, Louis Stokes Cleveland Veterans’ Affairs Medical Center, ClevelandOhio
Sandra Y. Silva
Affiliation:
Clinical Translational Science Program, Case Western Reserve University School of Medicine, Cleveland, Ohio
Brigid M. Wilson
Affiliation:
Geriatric Research, Education, and Clinical Center, Louis Stokes Cleveland VA Medical Center, Cleveland, Ohio
Curtis J. Donskey*
Affiliation:
Geriatric Research, Education, and Clinical Center, Louis Stokes Cleveland VA Medical Center, Cleveland, Ohio Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio
*
Author for correspondence: Curtis J. Donskey, E-mail: [email protected]

Abstract

Background:

Sink drainage systems are not amenable to standard methods of cleaning and disinfection. Disinfectants applied as a foam might enhance efficacy of drain decontamination due to greater persistence and increased penetration into sites harboring microorganisms.

Objective:

To examine the efficacy and persistence of foam-based products in reducing sink drain colonization with gram-negative bacilli.

Methods:

During a 5-month period, different methods for sink drain disinfection in patient rooms were evaluated in a hospital and its affiliated long-term care facility. We compared the efficacy of a single treatment with 4 different foam products in reducing the burden of gram-negative bacilli in the sink drain to a depth of 2.4 cm (1 inch) below the strainer. For the most effective product, the effectiveness of foam versus liquid-pouring applications, and the effectiveness of repeated foam treatments were evaluated.

Results:

A foam product containing 3.13% hydrogen peroxide and 0.05% peracetic acid was significantly more effective than the other 3 foam products. In comparison to pouring the hydrogen peroxide and peracetic acid disinfectant, the foam application resulted in significantly reduced recovery of gram-negative bacilli on days 1, 2, and 3 after treatment with a return to baseline by day 7. With repeated treatments every 3 days, a progressive decrease in the bacterial load recovered from sink drains was achieved.

Conclusions:

An easy-to-use foaming application of a hydrogen peroxide- and peracetic acid-based disinfectant suppressed sink-drain colonization for at least 3 days. Intermittent application of the foaming disinfectant could potentially reduce the risk for dissemination of pathogens from sink drains.

Type
Original Article
Copyright
© 2019 by The Society for Healthcare Epidemiology of America. All rights reserved.

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Footnotes

a

Authors of equal contribution.

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