免疫促进剂──酵母细胞壁

The yeast cell wall is recovered as a by-product during the production of soluble extracts from brewer's yeast(Saccharomyces cerevisiae).It is made up predominantry of glucan,mannan oligsaccharides,glucoprotein and chitin polymers.The glucan is a homopolimer of glucose linked through β—(1→3)and β—(1→6) D glycosidic bonds.The therapeutic effect of glucan has been primarily due to stimulation of reticuloendothelial system(RES).Studies have demonnstrated the effect of glucan in improving host resistancee by enhancing immunty to certain malingant tumors as well as to certain bacterial and viral infections.MOS's acts in the gut of animal capturing hostile gut-wall-attacking bacterla like E.Coli.Cell wall can be applied in all sorts feeds,but it is especially recommended for weaning piglets and aquaculture feeds.