Question:medium
Regarding pseudomembranous colitis, all of the following are true except?
Regarding pseudomembranous colitis, all of the following are true except?
Show Hint
This C. difficile disease causes watery, not bloody, diarrhoea; spot the false statement.
Updated On: Jun 24, 2026
- Toxin A is responsible for the clinical manifestations
- Toxin B is responsible for the clinical manifestations
- Blood in stools is a common feature
- Summit lesions are an early histopathological finding
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: This is a negative-stem question, so the goal is to find the one statement that does not fit pseudomembranous colitis, a C. difficile infection triggered by antibiotics.
Step 2: Both toxin A and toxin B drive the illness, validating those two statements, and the summit or volcano lesion is the hallmark early microscopic finding, validating that one as well.
Step 3: The hallmark clinical picture is copious watery diarrhoea, not bloody stools; visible blood is atypical for this condition.
Step 4: Hence the statement that blood in stools is a common feature is the incorrect one and is the answer.
\[\boxed{\text{Blood in stools is a common feature}}\]
Step 2: Both toxin A and toxin B drive the illness, validating those two statements, and the summit or volcano lesion is the hallmark early microscopic finding, validating that one as well.
Step 3: The hallmark clinical picture is copious watery diarrhoea, not bloody stools; visible blood is atypical for this condition.
Step 4: Hence the statement that blood in stools is a common feature is the incorrect one and is the answer.
\[\boxed{\text{Blood in stools is a common feature}}\]
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