The ESCMID Global Late Breakers series returns to Communicable! Five CMI Communications editors – Marc Bonten, Josh Davis, Angela Huttner, Anne-Grete Märtson, and Erin McCreary – handpicked five late-breaking trials presented at ESCMID Global 2026 to summarise their  findings and discuss whether the results will change their practice. This is part one of the two-part series. 

Trials presented are listed below and links to their respective sessions can be watched and rewatched on the ESCMID Global Virtual Platform. Links to corresponding publications, if available, and mentioned related articles are provided as well.

The FAST trial (Late-breaking research from JAMA)

• Banerjee R, et al. Fast Antimicrobial Susceptibility Testing for Gram-Negative Bacteremia. The FAST Randomized Clinical Trial, doi: 10.1001/jama.2026.5487 
• Srinivasan A. A Multinational Trial of Rapid Antimicrobial Susceptibility Testing. Is FASTer Better?, doi: 10.1001/jama.2026.5504

The CEFMEC trial (Poster session)

• Hayakawa K, et al. Effectiveness of cefmetazole versus meropenem for invasive urinary tract infections caused by extended-spectrum β-lactamase-producing Escherichia coli, Antimicrob Agents Chemother 2023, doi: 10.1128/aac.00510-23

The COBRA trial (Late-breaking trials in surgical infection prevention)

• Overdevest AG, et al. Antibiotic treatment for 1 day versus 4-7 days in patients with acute cholangitis after adequate endoscopic biliary drainage (COBRA): study protocol for a randomized controlled trial. Trials, doi: 10.1186/s13063-026-09524-7

The DOTS trial, a secondary analysis (Late-breaking research from JAMA)

• Lodise, TP, et al. Pharmacokinetics of Dalbavancin in Complicated Staphylococcus aureus Bacteremia: A Secondary Analysis of the DOTS Randomized Clinical Trial, JAMA 2026, doi: 10.1001/jamanetworkopen.2026.11652 
• Walls G, et al. Patient-reported Perceptions, Experiences, and Preferences Around Intravenous and Oral Antibiotics for the Treatment of Staphylococcus aureus Bacteremia: A Descriptive Qualitative Study, Clin Infect Dis 2026, doi: 10.1093/cid/ciaf522
• Turner  NA , et al.  Dalbavancin for treatment of Staphylococcus aureus bacteremia: the DOTS randomized clinical trial. JAMA 2025, doi: 10.1001/jama.2025.12543 

Maribavir for clinically significant cytomegalovirus infection in hematopoietic cell transplantation: a real-world retrospective international study of the Infectious Disease Working Party of EBMT (Late-breaking research from The Lancet)

• Paviglianiti A, et al. Maribavir for clinically significant cytomegalovirus infection in haematopoietic cell transplant recipients in Europe: a real-world multicentre retrospective registry study. Lancet 2026. doi: 10.1016/S1473-3099(26)00144-1