肺炎支原体(MP)是儿童社区获得性呼吸道感染最重要的病原体之一~([1])。MP感染后不仅可引起儿童上呼吸道感染、支气管炎、肺炎,甚至是大叶性肺炎,也可引起儿童慢性咳嗽,诱发儿童喘息的发生~([2])。近年来有研究报道,MP感染后引起患儿体液和细胞免疫功能改变,导致反复呼吸道感染的发生。本文对MP感染患儿抗体滴度变化趋势的临床特征与免疫功能改 Mycoplasma pneumoniae (MP) is one of the most important pathogens of community-acquired respiratory infections in children (1). MP infection can not only cause children with upper respiratory tract infection, bronchitis, pneumonia, and even lobar pneumonia, can also cause chronic cough in children, induced wheezing in children ~ ([2]). In recent years, studies have reported that MP infection caused by changes in children’s body fluids and cellular immune function, resulting in recurrent respiratory tract infection. In this paper, the clinical features and immune function changes of antibody titers in children with MP infection