Which agent is used to treat C. diff infection?

Which agent is used to treat C. diff infection?

• A. IV vancomycin and oral metronidazole
• B. Amoxicillin
• C. Ciprofloxacin
• D. Ceftriaxone

Answer: (A)

Treating C. difficile infection relies on antibiotics that reach the colon and are active against the organism. Vancomycin is the main drug used for this purpose because it achieves high concentrations in the colon when given appropriately. Metronidazole has also been used as an adjunct, especially in more complicated or resource-limited situations, or when vancomycin isn’t available. The combination of vancomycin with metronidazole reflects this therapeutic approach: targeting C. difficile with an agent that works in the gut, and adding another active agent when the disease is more severe or needs broader coverage. Other antibiotics like amoxicillin, ciprofloxacin, or ceftriaxone are not treatments for C. difficile infection; they are broad-spectrum agents that can predispose to C. difficile by disrupting gut flora but do not effectively treat the infection itself.

Treating C. difficile infection relies on antibiotics that reach the colon and are active against the organism. Vancomycin is the main drug used for this purpose because it achieves high concentrations in the colon when given appropriately. Metronidazole has also been used as an adjunct, especially in more complicated or resource-limited situations, or when vancomycin isn’t available. The combination of vancomycin with metronidazole reflects this therapeutic approach: targeting C. difficile with an agent that works in the gut, and adding another active agent when the disease is more severe or needs broader coverage.

Other antibiotics like amoxicillin, ciprofloxacin, or ceftriaxone are not treatments for C. difficile infection; they are broad-spectrum agents that can predispose to C. difficile by disrupting gut flora but do not effectively treat the infection itself.