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Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
Published on: June 4, 2012
Increased prevalence of and associated mortality with methicillin-resistant Staphylococcus aureus among hospitalized
Geoffrey C Nguyen1, Harshna Patel, Rachel Y Chong
1Mount Sinai Hospital IBD Centre, Department of Medicine, University of Toronto Faculty of Medicine, Toronto, Ontario, Canada. geoff.nguyen@utoronto.ca
Objectives:
Methicillin-resistant Staphylococcus aureus (MRSA) infection has become increasingly prevalent in US hospitals, and the impact of MRSA on hospitalized inflammatory bowel disease (IBD) patients is unknown.
Methods:
We used the Nationwide Inpatient Sample to identify admissions for IBD (n=116,842) between 1998 and 2004. We compared prevalence and in-hospital mortality of MRSA among IBD, non-IBD gastrointestinal (GI), and general medical inpatients.
Results:
MRSA prevalence increased from 4.5/10,000 to 19.0/10,000 over the 7-year period (P<0.0001). After adjustment for confounders, IBD inpatients were at increased risk of MRSA compared with the non-IBD GI (adjusted odds ratio (aOR) 1.61; 95% confidence interval (CI): 1.33-1.96) and general medical (aOR 1.36; 95% CI: 1.11-1.66) groups. Of those with MRSA, catheter-related infections were specifically more common among IBD compared with non-IBD GI and general inpatients (28.8% vs. 11.0% and 8.5%, respectively, P<0.0002). Bowel surgery, parenteral nutrition, and health insurance were predictors of MRSA infection, but the first two became insignificant after controlling for length of stay (LOS). Compared with LOS < or = 7 days, MRSA was more likely among those hospitalized 8-21 days (aOR 7.40; 95% CI: 4.68-11.7) and >21 days (aOR 58.6; 95% CI: 36.0-95.3). MRSA infection was associated with sevenfold increase in mortality (aOR 7.61; 95% CI: 3.33-17.4).
Conclusions:
Hospitalized IBD patients are at increased risk of MRSA compared with non-IBD GI and general medical inpatients. Increased mortality in the IBD population associated with MRSA reinforces the importance of measures to prevent nosocomial infection and to reduce length of hospitalization.
Insights
Hospitalized patients with inflammatory bowel disease (IBD) face a higher risk of methicillin-resistant Staphylococcus aureus (MRSA) infection. This increased risk is linked to greater mortality, highlighting the need for infection prevention strategies.
Area of Science:
- Infectious Diseases
- Gastroenterology
- Hospital Epidemiology
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) is a growing concern in hospital settings.
- The specific impact of MRSA on hospitalized patients with inflammatory bowel disease (IBD) remains largely unknown.
Purpose of the Study:
- To investigate the prevalence and outcomes of MRSA infections in hospitalized IBD patients.
- To compare MRSA risk and mortality in IBD patients versus non-IBD gastrointestinal and general medical inpatients.
Main Methods:
- Utilized the Nationwide Inpatient Sample (NIS) database from 1998-2004.
- Identified 116,842 IBD admissions and compared MRSA prevalence and in-hospital mortality.
- Adjusted for confounders including length of stay and comorbidities.
Main Results:
- MRSA prevalence significantly increased over the study period.
- IBD patients had a higher risk of MRSA compared to non-IBD GI and general medical patients.
- MRSA infection was associated with a sevenfold increase in mortality among IBD patients, with catheter-related infections being more common.
Conclusions:
- Hospitalized IBD patients are at an elevated risk for MRSA infections.
- MRSA is associated with increased mortality in the IBD population.
- Emphasizes the critical need for nosocomial infection prevention and reducing hospitalization length for IBD patients.
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