Is there a medical test to determine whether I have been exposed to diazinon?

Since Diazinon is only used in agricultural settings, the main way in which the general public could be exposed is through eating food treated with Diazinon. Diazinon may also be present in surface or well water as a result of run-off and movement through the soil from areas where diazinon is used in farming.

Diazinon exposure can also happen if you get it on your skin or breathe it in. Unless you work in an agricultural setting where diazinon is in use, being exposed in these ways is not likely.

Measuring effects
Most of the signs and symptoms resulting from Diazinon poisoning are due to the inhibition of an enzyme called acetylcholinesterase in the nervous system. This enzyme is also found in your red blood cells and a similar enzyme (plasma cholinesterase) is found in blood plasma. The most common test for exposure to many organophosphorus insecticides, including Diazinon, is to determine the level of cholinesterase activity in the red blood cells or plasma.

It takes time for this enzyme to completely recover to normal levels following exposure. Therefore, a valid test may be conducted a number of days following the suspected exposure. This test indicates only exposure to an insecticide of this type. It does not specifically show exposure to diazinon.

Detecting exposure
Specific tests are available to determine the presence of Diazinon or its breakdown products in blood, body tissue, and urine. These tests are only useful if done within a few hours or days of exposure. This is because Diazinon is rapidly broken down and excreted from the body.

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