Effects of Yeastβ-glucan on the Count of Escherichia coli in Pre-ruminant Calves
Zhou Yi
Diao Qiyu
Tu Yan
Gao Wei
Abstract：The object of this experiment was to study the effect of yeast β-glucan and bacitra-cin zinc on the count of Escherichia coli in vitro and in vivo. The results showed that the number of Escherichia coli after 3 h was significant lower in the group which supplemented with yeastβ-glucan when the pH of medium were 6 and 7(P<0.05). When the pH of medium were 8, the number of Escherichia coli was significant lower in the group which supplemented with yeast β-glucan than the control group after 6 h(P<0.05). Compared with the control group, ADG of the calves in two treatments that supplemented with yeast β-glucan and bacitracin zinc were increased by 30.4 and 30.8% after the Escherichia coli challenged(P<0.05). F/G in two treatments was lower than that in the control group. The count of Escherichia coli in the rectum was decreased(P<0.05) after the challenge in 12 h and 24 h. It could be concluded that yeast β-glucan at the dosage of 75 mg/kg could erase the decrease of growth performance of pre-ruminant calves which challenged with Esche-richia coli K99, thus using β-glucan in calves feed may decreased the usage of antibiotics.
Keywords：CalvesYeast β-glucanIntestinal microfloraEscherichia coli
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 15-20 )