RESUMO
Methicillin-resistant Staphylococcus aureus (MRSA) is a pathogen empirically covered in pulmonary infections. Limited studies evaluate the relationship between the MRSA PCR nasal swab assays and clinically diagnosed ventilator-associated pneumonia (VAP), lung abscess, and empyema. This retrospective, single-center study included 161 patients, which aimed to validate the clinical utility of MRSA PCR nasal swabs in VAP, lung abscess, and empyema through sensitivity, specificity, positive predictive value (PPV), and negative predicative value (NPV) analysis. VAP had a 100% sensitivity, 89% specificity, 67% PPV, and 100% NPV. Lung abscess had a 0% sensitivity, 90% specificity, 0% PPV, 90% NPV. Empyema had a 80% sensitivity, 84% specificity, 42% PPV, and 97% NPV. The study results demonstrate that the MRSA PCR nasal swab assay has the potential to be a vital tool in de-escalating antimicrobial therapy in VAP, lung abscess, and empyema.
Assuntos
Empiema , Abscesso Pulmonar , Staphylococcus aureus Resistente à Meticilina , Pneumonia Associada à Ventilação Mecânica , Infecções Estafilocócicas , Humanos , Staphylococcus aureus Resistente à Meticilina/genética , Pneumonia Associada à Ventilação Mecânica/diagnóstico , Pneumonia Associada à Ventilação Mecânica/tratamento farmacológico , Abscesso Pulmonar/diagnóstico , Estudos Retrospectivos , Reação em Cadeia da Polimerase/métodos , Infecções Estafilocócicas/diagnósticoRESUMO
Methicillin-resistant strains of S. aureus (MRSA) polymerase chain reaction (PCR) testing is a laboratory test that allows for rapid detection of MRSA and is available to use in skin infections via wound swab. There are limited data demonstrating the utility of MRSA PCR wound swabs on clinical outcomes in skin and soft tissue infections. This retrospective, single-center study included 652 patients to determine if the use of a MRSA PCR wound swab in skin infections results in a more rapid de-escalation in antibiotics. Patients with a MRSA PCR negative wound swab demonstrated a 1.0 (-1.5 to -0.53) day reduction of anti-MRSA antibiotic usage compared to those in the control group who did not have a MRSA PCR available (wound culture data only) (P < 0.001, unadjusted). The results of this study demonstrate that MRSA PCR wound swab assays have the potential to play a significant role in antibiotic de-escalation in the setting of skin and soft tissue infections.