What is the purpose of routine or emergency cholinesterase monitoring?

• A. To enable the pesticide handler to know when he/she has been overexposed to restricted use pesticides
• B. To enable a physician to recognize the occurrence of excessive exposure to organophosphate and carbamate insecticides
• C. To enable a physician to recognize the occurrence of excessive exposure to pyrethroid insecticides
• D. All of the above

Answer: (B)

Cholinesterase monitoring is used to detect inhibition of acetylcholinesterase caused by organophosphate and carbamate pesticides. When someone is exposed to these pesticides, the enzyme’s activity drops, often before or alongside symptoms. By comparing current enzyme activity to a pre-exposure baseline, a clinician can recognize whether exposure is excessive and decide on appropriate medical actions, such as treatment or decontamination. Pyrethroid pesticides do not inhibit cholinesterase, so this test won’t indicate exposure to them. While monitoring can inform safety programs and alert clinicians to problems, its primary purpose is to help a physician identify excessive organophosphate or carbamate exposure to guide care.