Protective effect of adsorbing and bio-transforming antimycotoxin agents on growth performance, carcass traits, blood parameters of broiler chickens exposed to mycotoxin- contaminated feed

Mycotoxin contamination in feed a common problem in broiler chickens' industry worldwide. This experimental study was performed at the Faculty of Veterinary Medicine, Thamar University with the aim to assess the impact of adsorbing and bio-transforming antimycotoxin agents on reducing toxic of aflatoxin B1 (AFB1) in broilers feed by examining the growth performance, carcass trait, serum parameters. 126 one-day old broiler chicks (Ross) were purchased from market and randomly allocated into 6 treatments and control groups containing 3 replicates with 7 birds in each replicate. The experimental groups were as following: (1) basal diet (clean or positive control), (2) mycotoxin-contaminated basal diet (negative control), (3) mycotoxin- contaminated basal diet and biolan in drinking water at 1%, (4) mycotoxin- contaminated basal diet and 2% zeolite, (5) mycotoxin- contaminated basal diet and 2% enzymes; and (6) mycotoxin- contaminated basal diet and mycofix 1%. In the starter period (0-3weeks), the birds in negative control, biolan, zeolite and enzymes groups showed better feed intakes, but not significant (P<0.05) comparing to other groups. The best feed conversion ratio (FCR) was recorded in the positive control and mycofix groups, and the worst FCR was recorded in the negative control group. In the grower period (3-6 weeks), the birds in biolan group showed higher feed intake, but the best weight gains and FCR were showed by the zeolite, positive control, enzymes and mycofix groups compared to the other groups. In the period of 6-7 weeks, enzymes and mycofix groups showed the best FCR indices compared to the negative control. Considering the weights of carcass yields and internal organs in broilers, the results revealed that, there were significant differences (P<0.05) in the dressing percentages of carcass at the end of experiment and none in the relative weight of the heart, liver, gizzard. Biochemistry analysis of blood demonstrated that there were no significant differences(P<0.05) in total protein, Albumin, Globulin serum concentrations of treated and negative control groups with exception in enzyme and mycofix groups. There were no significant differences (P<0.05) among mean values of serum cholesterol and triglycerides in treated and control group, in spite, higher mean values concentration of cholesterol and triglycerides was recorded in treated groups. The results also displayed that, the serum urea and creatinine were lower in the negative control group compared to treated and the positive control groups. In conclusion, the present results showed that there is positive effect by adding the adsorbenting and biotransforming antimycotoxins agents to broiler diets in terms of growth performance, carcass traits and blood parameters. Further research work should be carried on other additives diet of broilers.