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有免疾缺陷者容易感染,而容易感染者不一定都有免疫缺陷.先天性心脏病患者中一部分人呼吸系统容易感染,泌尿系统畸形患者可反复发生尿路感染,有解剖学上缺损代谢性疾病和Down氏综合征等患者均易招致感染.研究新生儿免疫缺陷,除应注意上述基础疾病及原发性免疫缺陷症外,还应注意正常新生儿也有生理性免疫缺陷状态,因为即使是成熟新生儿,在胎生期其免疫机构不如成人水平那样发达.在胎内,抗原刺激少,由
Infectious diseases are easily infected, but not necessarily vulnerable to infection are not immune deficiency.Some patients with congenital heart disease is susceptible to respiratory system, urinary tract malformations in patients with recurrent urinary tract infection, anatomical defect in the metabolism Disease and Down’s syndrome and other patients are susceptible to infection.Research neonatal immunodeficiency, in addition to should pay attention to the above-mentioned underlying diseases and primary immune deficiency, should also pay attention to the normal neonatal physiological immunodeficiency status, because even if Mature newborn, its immune system in the fetal life as well as developed as adults. In the fetus, less antigen stimulation, from