A victim shows bowel incontinence after exposure; this sign is most consistent with exposure to which agent category?

A victim shows bowel incontinence after exposure; this sign is most consistent with exposure to which agent category?

• A. Blister agents
• B. Nerve agents
• C. Biological agents
• D. Radiological

Answer: (B)

Bowel incontinence after exposure points to a cholinergic crisis caused by nerve agents. Nerve agents inhibit acetylcholinesterase, causing excess acetylcholine at muscarinic receptors. This drives increased GI secretions and smooth muscle activity, leading to diarrhea and, in severe cases, bowel incontinence. This rapid GI involvement is a hallmark of nerve agent exposure and distinguishes it from blister agents (which mainly cause skin and respiratory irritation), radiological exposure (which produces radiation sickness symptoms), and many biological agents (which vary by agent and aren’t defined by this direct cholinergic GI pattern).

Bowel incontinence after exposure points to a cholinergic crisis caused by nerve agents. Nerve agents inhibit acetylcholinesterase, causing excess acetylcholine at muscarinic receptors. This drives increased GI secretions and smooth muscle activity, leading to diarrhea and, in severe cases, bowel incontinence. This rapid GI involvement is a hallmark of nerve agent exposure and distinguishes it from blister agents (which mainly cause skin and respiratory irritation), radiological exposure (which produces radiation sickness symptoms), and many biological agents (which vary by agent and aren’t defined by this direct cholinergic GI pattern).