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Background Prolonged admissions for acute bacterial skin and skin structure infections (ABSSSI) present an opportunity to improve efficiency and quality of care. A primary reason for admission for ABSSSI is to receive intravenous (IV) antibiotics, where multiple guidelines support shifting care to outpatient settings for appropriate patients. A hospital pathway for ABSSSI that leverages long-acting IV antibiotic therapy, such as dalbavancin, may reduce the length of stay (LOS). The ENHANCE ABSSSI trial (NCT03233438) sought to quantify LOS vs. that of usual care after implementing a new ABSSSI pathway. Methods A single-center, pre- vs. post-period pragmatic trial at Weill-Cornell Medical Center assessed usual care for consecutively enrolled ABSSSI patients during an observational period (pre-period). A new ABSSSI pathway was implemented in the post-period, which included (1) identification of eligible admitted ABSSSI patients and (2) treatment with dalbavancin. Those with life-threatening infections, requiring multiple antibiotics/intensive care, or with unstable comorbidities were excluded. Outcomes were assessed over a 44-day follow-up period. Results Of 48 and 43 patients enrolled in pre- and post-periods (Figure 1), mean infection-related LOS was reduced in the post-period (3.2 days vs. 4.8 days; P = 0.003; Figure 2 and 3). Similar results were found in an adjusted LOS analysis. Work productivity and activity impairment outcomes significantly improved in the post-period, apart from absenteeism, while quality of life was similar between periods (Figure 4). Complete response to treatment was similar between periods: 50% (pre-period) and 57% (post-period). A greater proportion of total adverse events (AEs) occurred in the post-period (n = 20; 48%) vs. pre-period (n = 3; 6%) with most AEs being mild in severity and not related to antibiotic use; few AEs were serious (7% [n = 3] post-period vs. 2% [n = 1] pre-period). The most common AEs were unrelated infection in the pre-period and fever in the post-period. Conclusion After implementing the ENHANCE ABSSSI pathway among eligible patients, LOS was significantly reduced by almost 2 days, with potential improvements in work productivity and the ability to complete daily activities. Disclosures All authors: No reported disclosures.

open forum infectious diseases

456. Dalbavancin, a Long-Acting Lipoglycopeptide Antimicrobial Agent, Reduces Length of Stay and Improves Patient Work Productivity in a Hospital Critical Pathway for Acute Bacterial Skin and Skin Structure Infections (ABSSSI)—the ENHANCE ABSSSI Trial