This study investigated the defensive effect of dietary Hydrated sodium calcium aluminosilicate (HSCAS) (0.5%) and Saccharomyces cerevisiae (SC) (0.1%) on the preclusion of aflatoxin-B1 (AFB1) toxicity in broiler chicken during 1 -42 days of age. Eight hundred broiler chicks were arbitrarily assigned for 8 treatments of 5 replicates (each contained 20 chicks). On the other hand, chickens were offered the basal dietas Negative Control (NC, group 1); the other three groups 2, 3, and 4 were fed NC supplemented with 0.5% HSCAS, SC and HSCAS plus SC respectively, group 5 chicks were fed a basal diet contaminated with 1ppm AFB1 as Positive Control (PC), the other three groups 6, 7 and 8 were fed PC supplemented with 0.5% HSCAS, SC, and HSCAS plus SC respectively. Results exhibited that broiler chicks fed with a PC diet showed significantly (P<0.05) a worse feed conversion ratio and inferior daily body weight during the experimental period. Furthermore, AFB1 toxicity at 1mg dose significantly (P<0.05) increased creatinine, uric acid concentrations, alanine aminotransferase (ALT), aspartate aminotransferase (AST) activities and significantly (P<0.05) reduced the antibody titer against sheep red blood cells (SRBC), total protein, albumin values in broilers serum compared with ngative control. Aflatoxins supplementation significantly (P<0.05) increased malondialdehyde values in liver and significantly (P<0.05) diminished the reduced glutathione (GSH), glutathione S-transferase (GST). In addition to, dissemination of aflatoxin residue in broilers liver was detected. Nevertheless, dietary addition of HSCAS and SC, in separate and combined forms, alleviated the above-mentioned alterations. The combination of HSCAS with SC was more efficient than having them in a separate form.
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