Viral enterotoxin is detected as a possible mechanism of pathogenesis in –
**Core Concept**
Viral enterotoxins are proteins produced by certain viruses that cause gastrointestinal symptoms by disrupting normal intestinal function. These toxins can lead to increased secretion of water and electrolytes into the intestinal lumen, resulting in diarrhea.
**Why the Correct Answer is Right**
The correct answer involves a virus that produces a toxin causing enteric symptoms through a mechanism of action that disrupts normal intestinal function. The toxin binds to specific receptors on the intestinal epithelial cells, triggering a signaling cascade that leads to increased secretion of chloride and water into the intestinal lumen, resulting in diarrhea.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it refers to a bacterial pathogen, not a viral one.
**Option B:** This option is incorrect as it refers to a toxin produced by a bacterium, not a virus.
**Option C:** This option is incorrect as it refers to a virus that primarily causes respiratory symptoms, not gastrointestinal symptoms.
**Clinical Pearl / High-Yield Fact**
Some viral enterotoxins, such as those produced by rotavirus, can be neutralized by specific antibodies, making vaccination a potential strategy for prevention.
**Correct Answer: C. Rotavirus**