肺炎支原体(mycoplasma Pneumonlce简称MP),是呼吸道感染的常见病原之一。由肺炎支原体引起的肺部急性炎症,临床表现酷似细菌性或病毒性肺炎,近年有增加趋势,过去一般认为支原体肺炎多发生于3～14岁的年长儿,近年来婴幼儿感染报道逐渐增多。而且可引起心肌炎、脑炎、中毒性肝炎等多系统的肺外合并症,严重者可引起死亡或留有后遗症,引起了临床的日益重视。由于免疫学等方面的进展,国内外关于小儿支原体感染,尤其婴幼儿期肺炎支原体感染的特殊性及发展机理的研究,取得较多的进展,为广大儿科医生深入认识该种感染提供了很多宝贵资料。现结合文献资料介绍小儿肺 Mycoplasma pneumonia (mycoplasma Pneumoncece referred to as MP), is one of the common pathogen of respiratory tract infection. Mycoplasma pneumoniae caused by acute lung inflammation, clinical manifestations resemble bacterial or viral pneumonia, increased in recent years, in the past generally believed that mycoplasma pneumonia occurred in 3 to 14-year-old children, infants and young children in recent years reported a gradual increase in infection . And can cause myocarditis, encephalitis, toxic hepatitis and other systems of extrapulmonary complications, severe cases can cause death or sequelae, causing the clinical attention. Due to advances in immunology and other aspects, more progress has been made in the researches on the particularity and development mechanism of mycoplasma pneumoniae infection in children, especially in infants and children, providing a lot of valuable information for the majority of pediatricians to know this kind of infection in depth data. Now combined with the literature introduction of pediatric lung