Aaron Riutta

Project title: Occupational Determinants of Chlorpyrifos Adducts to Plasma Cholinesterase in Chlorpyrifos Exposed Agricultural Workers in Washington State

Degree: MS | Program: Occupational & Environmental Exposure Sciences (OEES) - no longer offered | Project type: Thesis/Dissertation
Completed in: 2012 | Faculty advisor: Christopher D. Simpson


Chlorpyrifos is a broad-spectrum chlorinated organophosphorus (OP) insecticide, acaricide, and miticide utilized around the world to control a variety of pests. It is primarily a non-systemic contact poison that interferes with the activity of acetylcholinesterase (AChE), an enzyme essential for nervous system function for humans and insects alike. Chlorpyrifos is the common name for 0,0-diethyl-0-(3,5,6-trichloro-2-pyridinyl)-phosphorothioate. The chemical is a colorless to white crystalline solid that possesses a mild mercaptan-like (thiol) odor. With a low solubility of 1.12 mg/L of water at 24°C (Racke, 1993) and being hydrophobic, chlorpyrifos is generally mixed with oily liquids instead of water before application (ATSDR, 1997).

* Taken from background