Abstract
Abstract Background In October 2019 updated community acquired pneumonia (CAP) guidelines were published, highlighting indications for empiric anti-MRSA and antipseudomonal antibiotics and use of MRSA nares screens. During a review of patients receiving vancomycin and piperacillin-tazobactam at our institution in 2020 we noted frequent use of anti-MRSA and antipseudomonal antibiotics and infrequent use of MRSA nares screens for CAP. In May 2020 we initiated a multifaceted intervention, including prospective audit and feedback, an updated pneumonia order set, and system-wide education. In this study we sought to describe gaps in the care of patients with CAP at our institution and to evaluate the impact of a multifaceted intervention on those gaps in care. Methods We performed a retrospective cohort study on a random sample of unique adult patients admitted with pneumonia from January 1, 2020 through June 30, 2021. Exclusion criteria included COVID infection within 4 weeks of admission, no antibiotics for pneumonia given during admission, immunocompromised condition, and diagnosis of hospital-acquired or ventilator-associated pneumonia. The primary objective was to describe the percentage of patients receiving appropriate anti-MRSA and antipseudomonal therapy and MRSA nares testing during the study period. The secondary objective was to compare appropriateness of these outcomes before and after the intervention. Study groups Results For the 126 patients reviewed, 68.3% received the appropriate empiric spectrum of activity for MRSA and Pseudomonas aeruginosa, improving from 60% to 80% before and after the intervention respectively. The percentage of patients screened for MRSA increased from 6 to 34%; however, the percentage of appropriate MRSA screens decreased from 71 to 54% because screens were often collected despite absence of MRSA risk factors. Results Conclusion The percentage of patients receiving appropriate anti-MRSA and antipseudomonal therapy for CAP improved after a multifaceted stewardship intervention. The percentage of patients for whom appropriate MRSA nares screens was performed worsened, mainly due to use of MRSA nares screens when not needed. Disclosures All Authors: No reported disclosures.
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