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Evaluation Study
Journal Article
Clinical utility of a nasal swab methicillin-resistant Staphylococcus aureus polymerase chain reaction test in intensive and intermediate care unit patients with pneumonia.
Diagnostic Microbiology and Infectious Disease 2016 November
This retrospective study aimed to validate the concordance between nasal swab methicillin-resistant Staphylococcus aureus (MRSA) polymerase chain reaction (PCR) test and respiratory culture and to determine the number of potentially preventable days of anti-MRSA therapy in patients with pneumonia. Two hundred adult inpatients in the intensive and intermediate care units were included. The nasal swab MRSA PCR test was positive in 55 (27.5%) patients. MRSA was isolated from respiratory culture in 21 (10.5%) patients. The nasal swab MRSA PCR test demonstrated 90.5% sensitivity, 79.9% specificity, 34.5% positive predictive value, and 98.6% negative predictive value. Anti-MRSA therapy was initiated in 168 (84%) patients. Patients in the study received a combined 782days of anti-MRSA therapy; 300days were considered potentially preventable. This study suggests that the nasal swab MRSA PCR test may be used to guide discontinuation of anti-MRSA antibiotics in patients with clinically confirmed pneumonia in the intensive or intermediate care units.
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