The addition of yeast-glucan to the diet of pregnant sows can significantly increase the concentration of IL-2 and lysozyme in breast milk, thereby promoting the immune function of sows and piglets. Adding yeast-glucan to piglet diet can improve the immune function and production performance of piglets, and affect the intestinal flora and blood physiological and biochemical indicators of piglets.
Studies have shown that appropriate addition of yeast-glucan can reduce various stress responses of animals, enhance the protective effect of vaccines, improve the health status of animals, and then improve the production performance of animals. Yeast-glucan can affect the nuclear and humoral immune function of pigs, and the level of immune antibodies against swine fever vaccine can be improved. The immune regulation effect is affected by the dosage and time of addition.
Low-dose yeast-glucan can moderately improve the body’s nuclear and humoral immune function, and enhance the body’s disease resistance, while high doses may affect the normal state of the body’s immune system. At the same time, we also found that adding 50 mg/kg β-glucan to the diet of weaned piglets could regulate their lipid metabolism and protein metabolism, enhance the immune function of the body, and thus significantly improve the production performance.
And in the following research, it was also found that the combination of glucan and sodium butyrate can significantly reduce the content of free fatty acids in plasma. It was proved by experiments that adding 0.05% (70%) β-glucan can significantly reduce the diarrhea rate of piglets. Can gain 7.6% weight. Injecting β-glucan into pigs can enhance the release of interferon and enhance their resistance to porcine reproductive and respiratory syndrome virus.
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It has a regulatory effect on the intestinal microflora of chicks, and can reduce the number of pathogenic microorganisms such as Escherichia coli and Salmonella in the cecum. It can improve the humoral immunity and cellular immunity of broilers.
Yeast glucan can effectively replace Virginiamycin as a growth promoter in broilers from birth to 38 days of age. The study found that adding 100mg/kg of -glucan to the diet of laying hens can significantly improve the immunity of laying hens, reduce the cholesterol content of egg yolk, improve egg quality, and have no effect on production performance, and its effect is better than antibiotics.
The technicians found that after adding 50% yeast-glucan preparation to the feed, the average daily weight gain of chickens was improved, and the difference was not significant, but the dead work rate was reduced by 3.88%. The gavage of 20 mg/kg or intramuscular injection of 2 mg/kg yeast glucan in the brooder and fattening period of chickens by technicians can significantly increase the weight of the spleen of broilers, as well as the number and activity of lymphocytes.
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Feeding beta glucan alone can significantly improve the growth performance and feed utilization of red sea bream, and it has a synergistic effect with bacteria. Glucan can be used as an effective additive for sea cucumber feed, but the dosage must be considered.
For Schizothorax prenanti, low-dose (500-1000mg/kg) beta-glucan can improve enzyme activity, complement C₃and IgM levels, intestinal SIgA levels, and enhance immune function. But high doses reduce immune function.
For Carp beta glucan was able to increase the phagocytic activity of blood cells and the activity of serum lysozyme.
For Whiteshrimp, adding 500mg/kg beta glucan to the feed, long-term (84d) feeding can significantly improve its immunity, antioxidant function and survival rate, enhance tissue and organ immunity and antioxidant indexes, and improve beta-1 , 3-glucan-binding protein gene expression.
It is particularly worth noting that the large-scale use of beta-glucan alone will lead to a decline in the immune indicators of aquatic animals, and the phenomenon of so-called “immune fatigue” occurs.
As an exogenous antioxidant, beta glucan can effectively remove free radicals in the body and prevent the damage of hydrogen peroxide and other reactive oxygen species; it can reduce the toxicity of oxidative products to cells by increasing the activity of immune-related enzymes. so as to protect the body.
Soaking fish body with different concentrations of beta glucan solution for 3 hours can reduce the cumulative mortality rate of Aeromonas hydrophila infection and enhance the anti-infection rate of rabbit epidemic function.
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