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Toxicological study of carbaryl in rats

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Abstract

The apparent effectiveness of 1-naphthyl-N-methyl carbamate (carbaryl) against a wide variety of insects motivated the study of its mammalian toxicity. In this toxicological study of carbaryl, mature male rats inhaled carbaryl at a mean concentration of 112mg, 168mg and 224mg/m3 for one hour. After inhalation, pentobarbital sleeping time, NADPH-cytochrome c reductase activity, cytochrome p-450 and protein content in liver microsomes, various tissue residues, cholinesterase inhibition in plasma and histopathological findings at autopsy were observed. The pentobarbital sleeping time was prolonged in rats inhaled with carbaryl for one day while the sleeping time was shortened in the 3 days inhaled group. The changes of cytochrome p-450 content and NADPH-cytochrome c reductase activity exhibited biphasic response showing the decrease in the one day inhaled group and the increase in the 3 days inhaled group. The marked depression of plasma ChE activity was observed in rats inhaled with carbaryl at 112mg/m3, however no more progressive effect was observed at the higher concentration of the compound. The main observations in histopathological finding were ciliary detachment, epithelial swelling and subepithelial inflammatory cellular infiltration in trachea due to the irritation.

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  1. College of Pharmacy, Sung Kyun Kwan University, 170, Suwon, Korea

    Wan-Koo Lee & Sa-Uk Hong

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Lee, WK., Hong, SU. Toxicological study of carbaryl in rats. Arch. Pharm. Res. 8, 119–132 (1985). https://doi.org/10.1007/BF02857037

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