Document Type : Research Paper
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Abstract
This study aimed to investigate the reduction of aflatoxinB1 transfer from feed to milk of goats fed a diet contaminated with aflatoxinB1,by pure baker's yeast cell wall beta-glucan(Saccharomyces cerevisiae)in combination with bentonite.Eighteen Mahabadi dairy goats with an initial weight of47.15±4.93 kg were randomly divided into three experimental groups with six replications.The treatments included:1) control (diet containing 25μg/kg dry matter of feed, aflatoxin B1),2)control +3g/day beta-glucan, and 3)control+0.6 g/day beta-glucan+2.4g/day commercial bentonite. After one week of acclimation, all goats underwent a 14-day mild aflatoxin B1 challenge during which dry matter intake, feed efficiency, milk production and composition, the concentration of aflatoxin M1 in the milk, and blood parameters were evaluated. The results showed that the initial and final weight, milk production and composition,dry matter intake and feed efficiency were similar in different groups The concentration of blood urea nitrogen,alanine transaminase,aspartate transaminase, and alkaline phosphatase, concentration,excretion and percentage of aflatoxin M1 transfer in milk changed in different groups compared to the control group (P<0.05). Also, two groups 2and3 showed a significant decrease in the percentage of transfer, concentration and excretion of aflatoxinM1 compared to the positive control group. In general, the results of this study showed that the combination of beta-glucan and bentonite with the ratio specified in this study has the ability to absorb aflatoxinB1 similar to beta-glucan and can reduce the concentration of aflatoxinM1 in milk to the same extent;Therefore,the combination of beta-glucan and bentonite is recommended as a cost-effective adsorbent of aflatoxinB1 compared to pure beta-glucan in livestock diets.
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