Influência da associação de adsorvente bentonita e antioxidantes no fígado, metabolismo oxidativo leucocitário e produção leiteira de bovinos alimentados com dietas contendo micotoxinas naturalmente produzidas

Abstract

It is estimated that almost 100% of the diet offered to dairy cattle is contaminated by myco-toxin-producing fungi, which can interfere with the performance and health of the animals. Thus, the present experiment verified whether the use of an mycotoxin adsorbent additive and hepatic antioxidants promote liver regeneration, interfere with leukocyte oxidative metaboism and enhance the milk production of 18 Holstein cattle fed with a diet containing low levls of naturally produced mycotoxins. A non-observational, longitudinal, completely randomized study was carried out, dividing the animals into a treatment group (GT) (n=9), which reeived the oral adsorbent for 56 days, and the control group (CG) (n=9) untreated. At weekly inter-vals, blood was collected for assessments of liver function and injury, cholestasis, systemic innate immunity, blood count, chemical and physical analysis of milk and volume of milk. The additive promoted effects from day D24, observing a decrease in the activity of GGT (p <0,05) and LDH (p <0,05), increase in serum PT and albumin (p <0,05), increase leukocyte oxidative metabolism (p <0,05), lower N/L ratio (p <0,05) and also increased the milk produc-tion volume by 19%. It was concluded that the adsorbent additive was able to regenerate liver health, improve leukocyte oxidative metabolism and promote a significant increase in bovine milk production.