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EUCAST stands for "European Committee on Antimicrobial Susceptibility Testing." It's an organization established to standardize and harmonize antimicrobial susceptibility testing methods and interpretations across Europe. EUCAST provides guidelines, breakpoints, and quality assurance standards for clinical microbiology laboratories to ensure accurate and consistent testing of bacterial pathogens' susceptibility to antibiotics and other antimicrobial agents. The committee comprises experts from European countries, including clinical microbiologists, infectious disease specialists, pharmacologists, and epidemiologists, who collaborate to develop and update guidelines based on scientific evidence, clinical data, and epidemiological trends. EUCAST breakpoints define the minimum inhibitory concentration (MIC) values that distinguish between susceptible, intermediate, and resistant bacterial strains, guiding clinicians in selecting appropriate antimicrobial therapy for treating infections. By promoting standardized testing methods and interpretations, EUCAST facilitates comparability of susceptibility data between different laboratories and countries, enhances surveillance of antimicrobial resistance patterns, and supports evidence-based antibiotic stewardship initiatives to combat the global threat of antimicrobial resistance. Additionally, EUCAST collaborates with international organizations, such as the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC), to coordinate efforts in antimicrobial resistance surveillance, research, and policy development, contributing to global health security and the preservation of effective antimicrobial therapies for future generations.