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7. Cholinesterase activity in white-winged doves exposed to methyl parathion.

Author

Small MF, Pruett CL, Hewitt DG, Hellgren EC, Perrigo GH, and Waggerman GL

Subjects
Administration, Oral, Animals, Brain drug effects, Cholinesterase Inhibitors administration & dosage, Cholinesterases blood, Dose-Response Relationship, Drug, Drinking, Insecticides administration & dosage, Methyl Parathion administration & dosage, Brain enzymology, Cholinesterase Inhibitors toxicity, Cholinesterases metabolism, Columbidae metabolism, Insecticides toxicity, Methyl Parathion toxicity
Abstract

Captive white-winged doves (Zenaida asiatica) were exposed to various levels of methyl parathion (MP) in drinking water to determine effects on brain and blood cholinesterase (ChE) activity. We conducted two experiments to test the influence of MP dose (the amount of MP actually ingested), MP concentration (the amount of MP per unit water), and exposure duration (number of days exposed to a constant MP concentration) on ChE activity. Plasma ChE activity was not useful in predicting brain ChE activity. Methyl parathion concentration had a greater influence on plasma and brain ChE activity levels than dose or time of exposure. These results contribute to the evaluation of irrigation water as a route of exposure of wildlife to pesticides.

Published
1998
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