Which statement best describes factors that drive the spread of antimicrobial resistance?

• A. The spread is driven by antimicrobial misuse, poor infection control, inadequate sanitation, and inappropriate food-handling.
• B. The spread is driven by vaccination programs.
• C. The spread is solely by genetic mutations within bacteria.
• D. Hand hygiene alone prevents antimicrobial resistance spread.

Answer: (A)

Antimicrobial resistance spreads through a mix of factors that increase both the emergence and movement of resistant organisms. When antimicrobials are misused—overprescribed, not completed, or used inappropriately in farming—they create selective pressure that favors resistant strains. In healthcare and community settings, gaps in infection control allow these organisms to pass from person to person. Inadequate sanitation and risky food-handling practices can disseminate resistant bacteria through water, surfaces, and the food supply. Vaccination programs, by reducing infections and overall antibiotic use, are not drivers of resistance spread. While genetic changes in bacteria contribute to resistance, the spread is driven more by how resistance traits are selected and transmitted in real-world settings. Hand hygiene helps reduce transmission, but it cannot address all drivers on its own.