What is a core principle of antibiotic stewardship?

• A. Use broad-spectrum therapy for all patients
• B. De-escalation to narrow-spectrum therapy based on culture results and minimize duration of therapy
• C. Rotate antibiotics
• D. Prolong therapy

Answer: (B)

Antibiotic stewardship is about using antibiotics in a way that cures infection while minimizing harm, including resistance, toxicity, and costs. The strongest principle here is to tailor therapy: start with an appropriate empiric plan when needed, then de-escalate to a narrow-spectrum agent based on culture results and the patient’s clinical response, and minimize how long the antibiotics are given. Narrowing the spectrum after identifying the pathogen reduces unnecessary exposure of other bacteria to antibiotics, which slows the development of resistance and helps preserve the patient’s normal microbiota. Shortening the duration of therapy to what guidelines and the clinical situation require further reduces resistance pressure and the risk of adverse effects. Together, narrowing the target and limiting duration embody responsible stewardship: you treat effectively with the least collateral damage.

Why not the other approaches? Using broad-spectrum therapy for all patients exposes many people to unnecessary antibiotics, increasing resistance risk and side effects. Rotating antibiotics without solid evidence isn’t a reliable strategy to prevent resistance. Prolonging therapy beyond what guidelines recommend tends to raise toxicity risk and resistance development without improving outcomes.