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While current research efforts focus primarily on identifying patient level interventions that mitigate the direct impact of COVID-19, it is important to consider the collateral effects of COVID-19 on antimicrobial resistance. Early reports suggest high rates of antibiotic utilization in COVID-19 patients despite their lack of direct activity against viral pathogens. The ongoing pandemic is exacerbating known barriers to optimal antibiotic stewardship in the ED, representing an additional direct threat to patient safety and public health. There is an urgent need for research analyzing overall and COVID-19 specific antibiotic prescribing trends in the ED. Optimizing ED stewardship during COVID-19 will likely require a combination of traditional stewardship approaches (e.g. academic detailing, provider education, care pathways) and effective implementation of host response biomarkers and rapid COVID-19 diagnostics. Antibiotic stewardship interventions with demonstrated efficacy in mitigating the impact of COVID-19 on ED prescribing should be widely disseminated and inform the ongoing pandemic response.

Background: Despite high negative predictive values (NPVs) seen with methicillin-resistant Staphylococcus aureus (MRSA) nares polymerase chain reaction (PCR) assays, utilization of both respiratory sample Gram stain and MRSA nares PCR in patients with pneumonia may contribute to overuse of laboratory resources. The purpose of this study was to evaluate if a Gram stain demonstrating no Gram-positive organisms from a respiratory sample is sufficient to allow for de-escalation of vancomycin therapy. Methods: This single center study retrospectively identified intensive care unit (ICU) patients started on vancomycin for presumed pneumonia at University of Wisconsin (UW) Health in Madison, WI between August 2022 and March 2023. Patients with respiratory sample demonstrating no Gram-positives on Gram stain met inclusion criteria if the sample was ordered within 24 h of vancomycin initiation. The primary outcome was NPV of respiratory sample Gram stain demonstrating no Gram-positive organisms with respect to MRSA detection of the respiratory culture. Secondary outcomes included the NPV of combined MRSA nares PCR plus respiratory sample Gram stain, and difference in time to event in patients that had both a respiratory sample and MRSA nares PCR ordered. Results: A total of 370 patients were screened for study eligibility; of which 99 patients met inclusion criteria. NPV of respiratory sample Gram stain was 99% for MRSA culture. The combined NPV of respiratory sample Gram stain plus MRSA nares PCR was 98.9% for MRSA culture (n = 88). Respiratory sample was ordered 2.3 h faster compared to MRSA nares PCR (4.3 vs 6.6 h, P =.036). Respiratory sample Gram stain resulted 4.5 h faster compared to MRSA nares PCR (10.7 vs 15.2 h, P =.002). Conclusion: Respiratory sample Gram stains demonstrating no Gram-positive organisms may be used to de-escalate vancomycin and deprioritize the use of MRSA nares PCR. [ABSTRACT FROM AUTHOR]

Background: Coronavirus disease 2019 (COVID‐19) is a highly contagious, airborne viral infection that can infect anyone. Those with certain underlying conditions may be at higher risk for infection to develop into a severe disease requiring hospitalization. This report summarizes use of nirmatrelvir‐ritonavir for the treatment of COVID‐19 in high‐risk patients at a single academic medical center through a pharmacist delegation protocol and demonstrates real‐world efficacy and safety of treatment. Methods: This retrospective, single‐center, observational study analyzed all patients who received nirmatrelvir‐ritonavir ordered by a clinical pharmacist for treatment of COVID‐19 infection. The primary outcomes were safety and efficacy of nirmatrelvir‐ritonavir. Safety was evaluated by analyzing drug interaction management and adverse events. Efficacy was evaluated through hospitalization and death within 28 days of nirmatrelvir‐ritonavir use. Results: Sixty patients were eligible for inclusion. No patients were hospitalized or died within 28 days after initiation of nirmatrelvir‐ritonavir. Pharmacists identified 101 drug interactions with 60% considered clinically significant, requiring modification of home medications. Adverse outcomes associated with the use of nirmatrelvir‐ritonavir were reported in 13 patients (21.7%). Conclusions: A comprehensive program to mitigate drug interactions and prescribe nirmatrelvir‐ritonavir ensured timely access to COVID‐19 therapy, which may be associated with the prevention of hospitalization and death. [ABSTRACT FROM AUTHOR]