Determination of acetylcholinesterase level is a medical test for evaluation of exposure to which pesticides?

• A. Neonicotinoids
• B. Glyphosate
• C. Pyrethroids
• D. Carbamate and organophosphorus pesticides

Answer: (D)

Measuring how active acetylcholinesterase is focuses on a specific danger from certain pesticides: those that inhibit this enzyme. Acetylcholinesterase normally breaks down acetylcholine in nerve synapses. When organophosphorus and carbamate pesticides are present, they bind to and inhibit AChE, causing acetylcholine to accumulate and leading to cholinergic symptoms. Checking AChE activity in blood (often red blood cell AChE) helps assess exposure and potential poisoning from these pesticides. The other pesticides listed—neonicotinoids, glyphosate, and pyrethroids—work through different mechanisms and do not inhibit acetylcholinesterase, so they aren’t monitored effectively by this enzyme level test.