Hostname: page-component-89b8bd64d-z2ts4 Total loading time: 0 Render date: 2026-05-13T13:25:38.370Z Has data issue: false hasContentIssue false

Pseudo-outbreak of Mycobacterium gordonae Following the Opening of a Newly Constructed Hospital at a Chicago Medical Center

Published online by Cambridge University Press:  18 December 2014

Kavitha Prabaker*
Affiliation:
University of Colorado, Aurora, CO, USA
Chethra Muthiah
Affiliation:
Metro Infectious Disease Consultants, Chicago, IL, USA
Mary K. Hayden
Affiliation:
Rush University Medical Center, Chicago, IL, USA
Robert A. Weinstein
Affiliation:
Rush University Medical Center, Chicago, IL, USA Cook County Health and Hospital Systems, Chicago, IL, USA
Jyothirmai Cheerala
Affiliation:
Rush University Medical Center, Chicago, IL, USA
Mary L. Scorza
Affiliation:
Rush University Medical Center, Chicago, IL, USA
John Segreti
Affiliation:
Rush University Medical Center, Chicago, IL, USA
Mary A. Lavin
Affiliation:
Saint Anthony Hospital, Chicago, IL, USA
Barbara A. Schmitt
Affiliation:
Rush University Medical Center, Chicago, IL, USA
Sharon F. Welbel
Affiliation:
Cook County Health and Hospital Systems, Chicago, IL, USA
Kathleen G. Beavis
Affiliation:
University of Chicago, Chicago, IL, USA
Gordon M. Trenholme
Affiliation:
Rush University Medical Center, Chicago, IL, USA
*
Address correspondence to Kavitha Prabaker, MD, 1635 Aurora Ct, Box B163, Aurora, CO 80045 (kavitha.prabaker@ucdenver.edu).

Abstract

OBJECTIVE

To identify the source of a pseudo-outbreak of Mycobacterium gordonae

DESIGN

Outbreak investigation.

SETTING

University Hospital in Chicago, Ilinois.

PATIENTS

Hospital patients with M. gordonae-positive clinical cultures.

METHODS

An increase in isolation of M. gordonae from clinical cultures was noted immediately following the opening of a newly constructed hospital in January 2012. We reviewed medical records of patients with M. gordonae-positive cultures collected between January and December 2012 and cultured potable water specimens in new and old hospitals quantitatively for mycobacteria.

RESULTS

Of 30 patients with M. gordonae-positive clinical cultures, 25 (83.3%) were housed in the new hospital; of 35 positive specimens (sputum, bronchoalveolar lavage, gastric aspirate), 32 (91.4%) had potential for water contamination. M. gordonae was more common in water collected from the new vs. the old hospital [147 of 157 (93.6%) vs. 91 of 113 (80.5%), P=.001]. Median concentration of M. gordonae was higher in the samples from the new vs. the old hospital (208 vs. 48 colony-forming units (CFU)/mL; P<.001). Prevalence and concentration of M. gordonae were lower in water samples from ice and water dispensers [13 of 28 (46.4%) and 0 CFU/mL] compared with water samples from patient rooms and common areas [225 of 242 (93%) and 146 CFU/mL, P<.001].

CONCLUSIONS

M. gordonae was common in potable water. The pseudo-outbreak of M. gordonae was likely due to increased concentrations of M. gordonae in the potable water supply of the new hospital. A silver ion-impregnated 0.5-μm filter may have been responsible for lower concentrations of M. gordonae identified in ice/water dispenser samples. Hospitals should anticipate that construction activities may amplify the presence of waterborne nontuberculous mycobacterial contaminants.

Infect Control Hosp Epidemiol 2014;00(0): 1–6

Information

Type
Original Articles
Copyright
© 2014 by The Society for Healthcare Epidemiology of America. All rights reserved 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable