A patient is receiving an antibiotic while the laboratory is completing culture and sensitivity testing. The result shows that a narrow-spectrum antibiotic will treat the organism. Which action is appropriate?
Correct answer: B. Change to the effective narrow-spectrum drug as prescribed
- A. Continue the broad-spectrum drug indefinitely
- B. Change to the effective narrow-spectrum drug as prescribed
- C. Add a second antibiotic without consulting the prescriber
- D. Stop antimicrobial treatment because the culture is complete
Explanation
Using the narrowest effective antibiotic reduces exposure to other bacteria and lowers the risk of resistance and superinfection. Culture results support de-escalation, but they do not mean treatment should be stopped automatically.
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About Antimicrobial Drugs
Antimicrobial pharmacology covers antibiotics, antitubercular, antifungal, antiviral and antiparasitic drugs, including their targets, clinical uses, resistance and major adverse effects. Questions distinguish bactericidal from bacteriostatic action, narrow from broad spectrum therapy, and antimicrobial treatment from supportive management of infection.
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