RT Journal Article T1 Impact of antimicrobial stewardship programs on antibiotic consumption and antimicrobial resistance in four Colombian healthcare institutions. A1 Pallares, Christian A1 Hernández-Gómez, Cristhian A1 Appel, Tobías Manuel A1 Escandón, Kevin A1 Reyes, Sergio A1 Salcedo, Soraya A1 Matta, Lorena A1 Martínez, Ernesto A1 Cobo, Sara A1 Mora, Laura A1 Marín, Adriana A1 Correa, Adriana A1 De La Cadena, Elsa A1 Rodríguez-Baño, Jesús A1 Villegas, María Virginia K1 Antibiotic resistance K1 Antimicrobial resistance K1 Antimicrobial stewardship K1 Antimicrobial stewardship program K1 Colombia K1 Hospital epidemiology AB Antimicrobial stewardship programs (ASPs) have become a fundamental pillar in optimizing antimicrobial usage, improving patient care, and reducing antimicrobial resistance (AMR). Herein we evaluated the impact of an ASP on antimicrobial consumption and AMR in Colombia. We designed a retrospective observational study and measured trends in antibiotic consumption and AMR before and after the implementation of an ASP using interrupted time series analysis over a 4-year period (24 months before and 24 months after ASP implementation). ASPs were implemented according to the available resources in each of the institutions. Before ASP implementation, there was a trend toward an increase in the antibiotic consumption of all measured antimicrobials selected. Afterward, an overall decrease in antibiotic consumption was observed. The use of ertapenem and meropenem decreased in hospital wards, while a decrease in the use of ceftriaxone, cefepime, piperacillin/tazobactam, meropenem, and vancomycin was observed in intensive care units. After ASP implementation, the trend toward an increase of oxacillin-resistant Staphylococcus aureus, ceftriaxone-resistant Escherichia coli, and meropenem-resistant Pseudomonas aeruginosa was reversed. In our study, we showed that ASPs are a key strategy in tackling the emerging threat of AMR and have a positive impact on antibiotic consumption and resistance. YR 2022 FD 2022-05-02 LK http://hdl.handle.net/10668/20271 UL http://hdl.handle.net/10668/20271 LA en DS RISalud RD Apr 6, 2025