一致公认母乳对新生儿感染具有防御作用。乳腺是一个良好的免疫器官,能产生活性巨噬细胞、淋巴细胞,并能分泌耐酸和耐蛋白水解酶的分泌型免疫球蛋白A(SIgA)。很明显,人乳中含有多种针对母体自身肠道菌群和病毒的抗体(SIgA),因此母乳喂养的婴儿如果接触到这些细菌具有防御作用。集合淋巴结中的淋巴细胞受抗原刺激后看来也可以至乳腺,并产生特异性的SIgA,这对哺乳婴儿肠道和全身性感染的保 It is unanimously accepted that breast milk has a defensive effect on neonatal infections. The mammary gland is a good immune organ that produces active macrophages, lymphocytes, and secrete secreted immunoglobulin A (SIgA) that is resistant to acids and proteases. Clearly, human milk contains many antibodies against the mother’s own gut flora and viruses (SIgA), so breastfeeding infants have a defensive effect if they come into contact with these bacteria. Lymphocytes in the aggregated lymph nodes appear to also reach the mammary glands when stimulated with the antigen and produce specific SIgA, which protects the intestinal and systemic infections of suckling infants