Patient presenting with abdominal pain, diarrhea taking clindamycin for 5 days. Treated with metronidazole symptoms subsided. What is the causative agent -: (A) Clostridium difficile, (B) Clostridium perfringens, (C) Clostridium welchi, (D) Clostridium marneffi
Answer is A. Ans. is 'a' i.e., Clostridium difficile