Program Schedule

Hospital Characteristics and Infection Prevention and Control Strategies Associated with Methicillin-Resistant Staphylococcus aureus (MRSA) and Clostridium difficile Infection (CDI) in Canadian Hospitals

Session: Poster Abstract Session: HAI Surveillance and Public Reporting
Friday, October 10, 2014
Room: The Pennsylvania Convention Center: IDExpo Hall BC

Measurement of the prevalence of antibiotic resistance assesses the associated burden of disease while also identifying vulnerable patient populations and monitoring the effectiveness of interventions.  The objective of this study was to determine institutional characteristics, and infection prevention and control (IP&C) policies associated with MRSA colonization/infection, and C. difficile infection.


In November 2012 a point-prevalence survey of MRSA and CDI was done in adult inpatients at Canadian acute-care hospitals with ≥50 beds.  Information was also obtained regarding institutional characteristics and IP&C policies of each participating facility.  Logistic regression models were designed using variables selected a priori and two-tailed p values less than 0.05 were considered significant.


132 (56% of eligible) hospitals representing all 10 Canadian provinces participated in the survey and were included in the analysis.  60% of facilities were located within the central region of Canada (Ontario and Quebec), the majority (54%) had fewer than 200 beds, and were non-teaching hospitals (68%). The median prevalence of MRSA colonization/infection was 3.9% (range: 0-26.8%) and median MRSA infection prevalence was 0.3% (range: 0-4.9%). The presence of pediatrics in the hospital (p=0.001), performing targeted versus universal admission screening (p<0.001), routine placement of MRSA carriers in a private room (p<0.001), routine use of surgical masks by staff caring for patients with MRSA (p=0.005), decolonization with mupirocin (p<0.001), and enhanced environmental cleaning of MRSA rooms (p=0.006) were  independently associated with a lower prevalence of MRSA colonization/infection. The median prevalence of CDI for participating facilities was 0.9% (0-5.5%). Teaching hospitals (p=0.011) and facilities with a shorter turn-around-time (< 24 hrs) for C. difficile toxin assay results (p=0.012) were associated with a higher prevalence of CDI.


Although hospital characteristics are inalterable, this study identified IP&C policies that may be used to limit the spread of antibiotic resistance in acute-care hospitals.

Victoria Williams, BSc, BASc, MPH, CIC1, Andrew E. Simor, MD, FRCPC, FACP1, Alex Kiss, PhD2, Allison Mcgeer, MD, MSc, FRCPC3, Guanghong Han, PhD4, Zahir Hirji, MSc5, Oscar E. Larios, MD6, Christine Moore, BSc, MLT3, Karl Weiss, MD, MSc, FRCPC7 and Infection Prevention and Control Canada, (1)Sunnybrook Health Sciences Centre, Toronto, ON, Canada, (2)Institute of Clinical Evaluative Sciences, Toronto, ON, Canada, (3)Mount Sinai Hospital, Toronto, ON, Canada, (4)Provincial Infection Control Network of British Columbia, Vancouver, BC, Canada, (5)The Scarborough Hospital, Toronto, ON, Canada, (6)University of Calgary, Calgary, AB, Canada, (7)H˘pital Maisonneuve-Rosemont, Montreal, QC, Canada


V. Williams, None

A. E. Simor, Pfizer Canada Inc: Grant Investigator and Scientific Advisor, Grant recipient and honoraria
Cubist Pharmaceuticals: Scientific Advisor, honoraria

A. Kiss, None

A. Mcgeer, None

G. Han, None

Z. Hirji, None

O. E. Larios, None

C. Moore, None

K. Weiss, None

Findings in the abstracts are embargoed until 12:01 a.m. EDT, Oct. 8th with the exception of research findings presented at the IDWeek press conferences.

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