Initial therapy for Clostridium difficile infection is which antibiotic?

Initial therapy for Clostridium difficile infection is which antibiotic?

• A. Oral Vancomycin
• B. Fidaxomicin
• C. Metronidazole
• D. Rifaximin

Answer: (C)

Treating C. difficile infection hinges on delivering effective antibiotic therapy to the colon where the bacteria reside and toxin wreaks havoc. Metronidazole works well for anaerobes and, when taken orally, achieves good concentrations in the large intestine, making it a reasonable initial option for mild to moderate CDI. It targets the infection at its site and historically has been chosen as first-line therapy in this scenario. In contrast, for more severe disease, vancomycin or fidaxomicin is preferred due to higher efficacy, and rifaximin isn’t used as the initial treatment. So for straightforward initial cases, metronidazole is the best starting antibiotic.

Treating C. difficile infection hinges on delivering effective antibiotic therapy to the colon where the bacteria reside and toxin wreaks havoc. Metronidazole works well for anaerobes and, when taken orally, achieves good concentrations in the large intestine, making it a reasonable initial option for mild to moderate CDI. It targets the infection at its site and historically has been chosen as first-line therapy in this scenario. In contrast, for more severe disease, vancomycin or fidaxomicin is preferred due to higher efficacy, and rifaximin isn’t used as the initial treatment. So for straightforward initial cases, metronidazole is the best starting antibiotic.