RT Journal Article T1 A step forward in antibiotic use and resistance monitoring: a quarterly surveillance system pilot in 11 European Union/European Economic Area countries, September 2017 to May 2020. A1 Peñalva, German A1 Crespo-Robledo, Paloma A1 Molvik, Mari A1 Lopez-Navas, Antonio A1 Kacelnik, Oliver A1 Cisneros, Jose Miguel K1 EU-JAMRAI K1 Europe K1 Surveillance K1 antibiotic use K1 antimicrobial resistance AB BackgroundSurveillance of antimicrobial resistance (AMR) and antimicrobial use (AMU) in Europe is currently annual.AimTo study the feasibility and scalability of a quarterly AMR/AMU surveillance system in the European Union/European Economic Area (EU/EEA).MethodsWe conducted a longitudinal study within the scope of the EU-JAMRAI project. Seventeen partners from 11 EU/EEA countries prospectively collected 41 AMU and AMR indicators quarterly from September 2017 to May 2020 for the hospital sector (HS) and primary care (PC). Descriptive statistics and coefficients of variation (CV) analysis were performed.ResultsData from 8 million hospital stays and 45 million inhabitants per quarter were collected at national (n = 4), regional (n = 6) and local (n = 7) levels. Of all partners, five were able to provide data within 3 months after each preceding quarter, and eight within 3-6 months. A high variability in AMU was found between partners. Colistin was the antibiotic that showed the highest CV in HS (1.40; p  PB European Centre for Disease Prevention and Control YR 2022 FD 2022-11-17 LK http://hdl.handle.net/10668/20506 UL http://hdl.handle.net/10668/20506 LA en NO Peñalva G, Crespo-Robledo P, Molvik M, López-Navas A, Kacelnik O, Cisneros JM, et al. A step forward in antibiotic use and resistance monitoring: a quarterly surveillance system pilot in 11 European Union/European Economic Area countries, September 2017 to May 2020. Euro Surveill. 2022 Nov;27(46):2200082. DS RISalud RD Apr 6, 2025