## **Core Concept**
Enteritis necroticans, also known as pigbel disease, is a severe gastrointestinal infection characterized by necrosis of the intestinal mucosa. It is primarily caused by a toxin produced by a specific bacterium. This condition is often associated with the consumption of contaminated food.

## **Why the Correct Answer is Right**
The correct answer, , is *Clostridium perfringens* type C. This bacterium produces a toxin that causes enteritis necroticans. The toxin damages the intestinal lining, leading to necrosis. *Clostridium perfringens* type C is known to cause this severe form of gastroenteritis, particularly in areas where the organism is endemic.

## **Why Each Wrong Option is Incorrect**
* **Option A:** - This option is incorrect because, although *Clostridium perfringens* is indeed associated with gastrointestinal diseases, the specific type that causes enteritis necroticans is type C, not type A.
* **Option B:** - This option is incorrect as there is no commonly recognized pathogen by this designation that causes enteritis necroticans.
* **Option D:** - This option is incorrect because, while *Vibrio cholerae* causes cholera, a diarrheal disease, it does not cause enteritis necroticans.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that enteritis necroticans is often linked to the consumption of contaminated pork or other meats, particularly in areas like Papua New Guinea where the disease has been endemic. The disease can be severe and is associated with high mortality if not promptly treated.

## **Correct Answer:** .