Saccharomyces cerevisiae and application thereof in prevention and treatment of escherichia coli infection

The invention discloses saccharomyces cerevisiae and application thereof. The preservation number of the saccharomyces cerevisiae is CDMCC No: 63178. The saccharomyces cerevisiae and the preparation thereof can effectively improve the daily gain of broiler chickens and reduce the feed-to-weight ratio; the immune response level is improved; the digestive tract protease activity is improved; the cecum short-chain fatty acid is increased; the growth of cecum beneficial bacteria is promoted. The feed additive has remarkable effects of promoting healthy growth of broilers and preventing and treating escherichia coli infection of the broilers, and has important significance in reducing harm caused by abuse of feed antibiotics and improving economic benefits of breeding. 本发明公开了一株酿酒酵母及其应用，该菌株的保藏编号为CDMCC No：63178。本发明所述酿酒酵母及其制剂能有效提高肉鸡的日增重、降低料重比；提高免疫应答水平；提高消化道蛋白酶活力；提高盲肠短链脂肪酸及促进盲肠有益菌生长。在促进肉鸡健康生长、预防和治疗肉鸡大肠杆菌感染有显著效果，对减少饲用抗生素滥用引起的危害、提高养殖经济效益具有重要意义。