Medical Microbiology Antibiotic stewardship

Antibiotics: a resource to be protected.

Topic overview

Start with the big picture

Stewardship aims to optimize clinical cure while minimizing toxicity and resistance and reducing avoidable costs. Its practical workflow includes obtaining cultures before treatment when feasible, choosing empiric therapy based on likely pathogens, local resistance information, and illness severity, then reassessing treatment after 48–72 hours. Culture results and clinical response can support narrowing therapy or stopping antibiotics when infection is unconfirmed. Appropriate use also involves selecting the right dose, route, infusion, and duration; avoiding antibiotics when they are not indicated; and switching from intravenous to oral treatment when the patient is stable and absorbing medication. Hospital programs support this work through leadership, pharmacy expertise, tracking, feedback, education, and integration with infection prevention.

Learning objectives

What you'll learn

  • Explain how antimicrobial stewardship helps address antimicrobial resistance.
  • Describe how cultures, likely pathogens, local antibiograms, and illness severity inform antibiotic selection.
  • Outline the purpose of the 48–72-hour antibiotic time-out and de-escalation.
  • Identify practices that support appropriate dosing, duration, route, and antibiotic use.
  • Summarize how hospital programs track, communicate, and reinforce stewardship.
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