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Carbapenem-Resistant Acinetobacter baumannii: Concomitant Contamination of Air and Environmental Surfaces

Published online by Cambridge University Press:  05 April 2016

Luis A. Shimose ,
Eriko Masuda ,
Maroun Sfeir ,
Ana Berbel Caban ,
Maria X. Bueno ,
Dennise dePascale ,
Caressa N. Spychala ,
Timothy Cleary ,
Nicholas Namias  and
Daniel H. Kett
...Show all authors
Luis A. Shimose
Affiliation:
Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
Eriko Masuda
Affiliation:
Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
Maroun Sfeir
Affiliation:
Department of Medicine, Weill Cornell Medical College, New York, New York
Ana Berbel Caban
Affiliation:
Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
Maria X. Bueno
Affiliation:
Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
Dennise dePascale
Affiliation:
Department of Pathology, Miller School of Medicine, University of Miami, Miami, Florida
Caressa N. Spychala
Affiliation:
Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
Timothy Cleary
Affiliation:
Department of Pathology, Miller School of Medicine, University of Miami, Miami, Florida
Nicholas Namias
Affiliation:
Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida
Daniel H. Kett
Affiliation:
Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida
Yohei Doi
Affiliation:
Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
L. Silvia Munoz-Price*
Affiliation:
Department of Medicine, Froedtert and the Medical College of Wisconsin, Milwaukee, Wisconsin
*
Address correspondence to L. Silvia Munoz-Price, MD, PhD, Human Research Building Suite #2100 (Office H2250), 8701 Watertown Plank Road, PO Box 26509, Milwaukee, WI 53226 ([email protected]).
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Abstract

OBJECTIVE

To concomitantly determine the differential degrees of air and environmental contamination by Acinetobacter baumannii based on anatomic source of colonization and type of ICU layout (single-occupancy vs open layout).

DESIGN

Longitudinal prospective surveillance study of air and environmental surfaces in patient rooms.

SETTING

A 1,500-bed public teaching hospital in Miami, Florida.

PATIENTS

Consecutive A. baumannii–colonized patients admitted to our ICUs between October 2013 and February 2014.

METHODS

Air and environmental surfaces of the rooms of A. baumannii–colonized patients were sampled daily for up to 10 days. Pulsed-field gel electrophoresis (PFGE) was used to type and match the matching air, environmental, and clinical A. baumannii isolates.

RESULTS

A total of 25 A. baumannii–colonized patients were identified during the study period; 17 were colonized in the respiratory tract and 8 were colonized in the rectum. In rooms with rectally colonized patients, 38.3% of air samples were positive for A. baumannii; in rooms of patients with respiratory colonization, 13.1% of air samples were positive (P=.0001). In rooms with rectally colonized patients, 15.5% of environmental samples were positive for A. baumannii; in rooms of patients with respiratory colonization, 9.5% of environmental samples were positive (P=.02). The rates of air contamination in the open-layout and single-occupancy ICUs were 17.9% and 21.8%, respectively (P=.5). Environmental surfaces were positive in 9.5% of instances in open-layout ICUs versus 13.4% in single-occupancy ICUs (P=.09).

CONCLUSIONS

Air and environmental surface contaminations were significantly greater among rectally colonized patients; however, ICU layout did not influence the rate of contamination.

Infect Control Hosp Epidemiol 2016;37:777–781

Type
Original Articles
Information
Infection Control & Hospital Epidemiology , Volume 37 , Issue 7 , July 2016 , pp. 777 - 781
Copyright
© 2016 by The Society for Healthcare Epidemiology of America. All rights reserved 

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Footnotes

PREVIOUS PRESENTATION. The results of this project were presented in part in Abstract #1803 at ID Week 2014 in Philadelphia, Pennsylvania, on October 11, 2014.

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