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  • Title: Toxicity of dietary monensin in quail.
    Author: Sawant SG, Terse PS, Dalvi RR.
    Journal: Avian Dis; 1990; 34(3):571-4. PubMed ID: 2241682.
    Abstract:
    Quail were fed monensin to determine liver damage, as measured by changes in activities of serum enzymes and liver microsomal enzymes. Monensin fed at a therapeutic level of 110 ppm for 2 weeks produced an increase in cytochrome P-450 and cytochrome b5 and induction of the activities of benzphetamine N-demethylase, aminopyrine N-demethylase, and aniline hydroxylase, with no changes in the activities of serum sorbitol dehydrogenase (SDH), alanine aminotransferase (ALT), and aspartate aminotransferase (AST). On the other hand, quail fed 110 ppm, 220 ppm, and 330 ppm monensin in feed for 6 weeks showed a significant rise in SDH and AST activities at 330 ppm but not at 110 ppm and 220 ppm. The manifestations of liver toxicity observed at 330 ppm were accompanied by a significant decrease in all the aforementioned hepatic microsomal mixed-function oxidases. In contrast, quail fed monensin at 110 ppm and 220 ppm for 6 weeks produced no change in these parameters except for benzphetamine N-demethylase, aminopyrine N-demethylase, and aniline hydroxylase, which were significantly increased in birds fed 220 ppm of monensin.
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