Microbiology Which of the following is the causative organism of Pseudomembranous colitis? A Clostridium perfringens B Clostridium difficile C Clostridium tetani D Clostridium botulinum 💡 Explanation Which of the following is the causative organism of Pseudomembranous colitis? ✓ Correct Answer: B. Clostridium difficile