مطالعه اثرات مخمر (ساكارومايسس سرويسيه) بر عملكرد و پارامترهاي بيوشيميايي سرم در جوجه هاي گوشتي مبتلا به آفلاتوكسيكوزيس

The Effect of Yeast (Saccharomyces cerevisiae) on the Performance and on the Serum Biochemical Parameters in Broiler Chicks Afflicted with Aflatoxicosis

The amelioration of aflatoxicosis in broiler chicks was exemined through the dietary addition of Saccharomyces cerevisiae (SC). Saccharomyces cerevisiae incorporated into the diet at 1 g/Kg was evaluated for its ability to reduce the deleterious effects of 1 and 2 mg total aflatoxins (AFs) Kgʹ1 diet on growing broiler chicks from 1 to 42 days of age. Four hundred and eighty day-old male chicks (Ross-308) were assigned to a completely randomized design of six treatments (l:basal diet (without aflatoxin), 2: basal diet + SC (Ig/kg), 3: basal diet + AFs (1 mg/kg) ., 4: basal diet +AFs (1 mg/kg) + SC (lg/kg)., 5: basal diet +AFs (2 mg/kg)., 6: basal diet +AFs (2 mg/kg) SC (lg/kg)) with four replicatesʹ each 20 chicks. The AF treatments (3 and 5) significantly decreased food consumption and body-weight gain and increased food conversion ratio (p<0.05). Changes in body weight gain, feed intake and feed conversion ratio were not significant through an addition of SC to the AF-containing diets (4 and 6). Serum cholestrol, total protein and albumin decreased significantly (p<0.05) in diets contaminated with aflatoxin. Compared to controls, the addition of SC to an AF-containing diet significantly reduced the deleterious effects of AF on cholestrol, albumin and total protein. The AF treatments (3 and 5) were accompanied by higher activities of the enzymes LDH and AST, but decreased ALP activity. The addition of SC to an AF-containing diet did not produce any significant changes in activities of enzymes as compared to control. These results suggest that SC reduces the adverse effects of AF and may be helpful in amelioration of the aflatoxicosis problem in poultry.