一、母乳是婴儿的最佳食品 母乳有多种抗感染功能较强的体液免疫成分,如分泌型I_gA、免疫球蛋白M、G、D,补体C_3、C_4 ,乳铁蛋白、溶菌酶和乳肝褐质等。母乳在免疫球蛋白中,以分泌型I_gA含量最高,占初乳中免疫球蛋白总量的89.8％,产后第一天母乳中分泌型I_gA高达3152.5±758.4mg/dl,是正常人血清中I_gA含量的13.5倍。由于分泌型I_gA对酸、碱和蛋白酶的水解作用有较强的抵抗 First, breast milk is the best food for babies Breast milk has a variety of strong anti-infective humoral immune components, such as secreted I_gA, immunoglobulin M, G, D, complement C_3, C_4, lactoferrin, lysozyme and milk Liver brown and so on. Breast milk in immunoglobulin to secretory I_gA content of the highest, accounting for 89.8% of the total immunoglobulin in colostrum, the first day postpartum secreted type I_gA breast up to 3152.5 ± 758.4mg / dl, normal human serum I_gA 13.5 times the content. Due to the secretion of I_gA acid, alkali and protease hydrolysis has strong resistance