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© 1992 Oxford University Press

research-article

Acute Toxic Effects of Oxamyl in the Rat

V. FAYEZ and W. W. KILGORE

Department of Environmental Toxicology, University of California Davis, California 95616

Received April 23, 1991; accepted July 18, 1991

Acute Toxic Effects of Oxamyl in Rats. FAYEZ, V., AND KILGORE, W. W. (1992). Fundam. Appl. Toxicol. 18, 155–159.

The effects of single acute oral doses of 1, 2.1, and 3.5 mg/kg oxamyl (a carbamate insecticide) on selected biochemical parameters in male Sprague-Dawley rats were investigated. The animals exhibited significantly decreased weight gain when compared to control animals. The compound inhibited brain and blood acetycholinesterase significantly in the first few hours of exposure. Liver glucose-6-phosphatase was inhibited substantially after 7 and 4 days at the levels of 2.1 and 3.5 mg/kg, respectively. Maximum inhibition of liver succinic acid dehydrogenase was noted after 1 day at the level of 1 mg/kg and after 6 hr at the level of 2.1 and 3.5 mg/kg. Significant changes in serum total lipids and glucose were observed when oxamyl was given at 2.1 and 3.5 mg/kg, but serum protein was not affected at any dose level. However, the absence of statistically significant effects between Days 7 and 14 in most of the investigated parameters is indicative of an overall moderate degree of toxicity of oxamyl following acute oral administration of the selected doses.


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