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肺炎支原体（ＭＰ）是呼吸道感染的常见病原。我们应用聚合酶链反应（ＰＣＲ）技术检测Ｍｐ一ＤＮＡ，该方法具有早期，快速、敏感，特异性高等特点。７５例疑ＭＰ感染患儿的咽分泌物标本，阳性３０例（４０％）。ＭＰ感染大多数引起鼻咽炎、支气管炎、不典型肺炎。通过分析发病年龄，我们发现５岁～１１岁年龄组感染率最高，１岁～３岁组次之，最小患病年龄为４个月，表明ＭＰ感染向低龄儿方向发展。ＰＣＲ可以早期、快速对ＭＰ感染做出诊断，对我们研究ＭＰ感染帮助很大，可以使我们重新认识ＭＰ的发病率。
Mycoplasma pneumoniae (MP) is a common cause of respiratory infections. We use polymerase chain reaction (PCR) to detect Mp-DNA, which has the characteristics of early, rapid, sensitive and high specificity. Thirty cases of pharyngeal secretions from 75 cases of suspected MP infection were positive (30%). Most MP infections cause nasopharyngitis, bronchitis, atypical pneumonia. By analyzing the age of onset, we found that the highest infection rate in the 5-year-old age group, followed by the 1-year-old to 3-year-old group, the minimum age of illness was 4 months, indicating that MP infection to the younger children direction. PCR can be early, rapid diagnosis of MP infection, the study of our MP infection help a lot, we can re-recognize the incidence of MP.