Which organism is most associated with antibiotic-associated diarrhea and pseudomembranous colitis?

Prepare for the Alimentary Bacteriology Test. Utilize flashcards and multiple choice questions, complete with hints and explanations. Ensure your success on the exam!

Multiple Choice

Which organism is most associated with antibiotic-associated diarrhea and pseudomembranous colitis?

Antibiotic use disrupts the normal gut microbiota, allowing Clostridioides difficile to overgrow. This organism makes toxins A and B that injure the colonic mucosa, leading to antibiotic-associated diarrhea and the classic inflammatory exudate that forms pseudomembranes, known as pseudomembranous colitis. The other organisms listed cause different foodborne illnesses or neurotoxic effects and are not the typical culprits behind this antibiotic-related colitis.

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