目的：为了了解血清ＣＲＰ在肺部感染中的意义。方法：采用放射免疫法测定３０例肺炎和２０例急性支气管炎患者血清ＣＲＰ的变化。结果：显示肺炎患者血清ＣＲＰ水平（８９５±２４９ｍｇ／Ｌ）明显高于急性支气管炎患者的水平（１２７±６８ｍｇ／Ｌ，Ｐ＜００１）；肺炎组平均治愈时间为１５２±３２ｄ，经治疗７ｄ，绝大多数肺炎患者的体温和血白细胞总数均已恢复正常，而此时患者的血清ＣＲＰ水平仍全部尚未恢复正常。结论：血清ＣＲＰ是肺部感染的一个重要辅助检查，它不仅有助于肺炎与支气管炎的鉴别，同时也是一个反映肺炎疗效的很好指标 Objective: To understand the significance of serum CRP in pulmonary infection. Methods: Serum CRP level was measured by radioimmunoassay in 30 patients with pneumonia and 20 patients with acute bronchitis. Results: Serum CRP levels in patients with pneumonia (89.5 ± 24.9 mg / L) were significantly higher than those in patients with acute bronchitis (12.7 ± 68 mg / L, P <001) Time was 15  2  3  2d, 7d after treatment, the vast majority of patients with pneumonia in the body temperature and the total number of white blood cells have returned to normal, but at this time the patient’s serum CRP levels are still not returned to normal. Conclusion: Serum CRP is an important auxiliary examination of pulmonary infection. It not only contributes to the identification of pneumonia and bronchitis, but also a good indicator of the curative effect of pneumonia