母乳喂养的婴儿,往往生病少,这是什么缘故呢?近年来,发现母乳里含有许多免疫物质,如免疫球蛋白、补体、乳铁蛋白、溶菌酶和免疫活性细胞等等。特别值得一提的是母乳中含有丰富的抗体——分泌型免疫球蛋白A,这种抗体性质很稳定,不会被一般的消化液所破坏。婴儿吃了母乳后,它就复盖在咽部、食道、肠子粘膜的表面,阻止病原菌粘附在粘膜表面,同时还能将多种细菌和病毒就地消灭。这种免疫球 Breastfeeding infants, often sick less, what is the reason? In recent years, found in breast milk contains many immune substances, such as immunoglobulin, complement, lactoferrin, lysozyme and immune cells and so on. Particularly worth mentioning is that breast milk is rich in antibodies - secreted immunoglobulin A, this antibody is very stable, will not be destroyed by the general digestive juice. After the baby ate breast milk, it covered the pharynx, esophagus, intestinal mucosa surface, prevent the pathogen adhesion to the mucosal surface, but also a variety of bacteria and viruses in situ elimination. This immunoglobulin