目的 研究左氧氟沙星联合痰热清注射液对社区获得性肺炎(CAP)患者肺炎严重度指数(PSI)和CURB-65评分的影响。 方法 将2015年3月-2017年3月于我院接受治疗的198例CAP患者随机分为两组。联合组(100例)予以左氧氟沙星联合 痰热清注射液治疗；对照组(98例)予以左氧氟沙星注射液抗炎治疗。比较两组治疗前后病情严重程度指标(PSI、 CURB-65评分)评估结果及血清C反应蛋白(CRP)、血清降钙素原(PCT)检测结果差异。结果 治疗后，两组PSI评分、 CURB-65评分、CRP、PCT均较治疗前下降，且联合组明显低于对照组(P﹤0.05)。结论 左氧氟沙星联合痰清热注射液 可明显降改善CAP患者的病情严重程度，对调节其CRP、PCT水平、促进病情转归有利。

Objective To study the effect of Levofloxacin combined with Tanreqing injection on pneumonia severity index (PSI) and CURB-65 scores in patients with community acquired pneumonia (CAP). Methods 198 patients with CAP who received treatment in our hospital from March 2015 to March 2017 were randomly divided into two groups. The combined group (100 cases) was treated with Levofloxacin combined with Tanreqing injection, while the control group (98 cases) was given anti-inflammatory treatment with Levofloxacin injection . The evaluation results of severity indexes (PSI and CURB-65 scores) and the differences of serum C reactive protein (CRP) and serum procalcitonin (PCT) between the two groups were compared before and after treatment. Results After treatment, the scores of PSI and CURB-65, and levels of CRP and PCT in the two groups were decreased, and all these indexes in the combination group were significantly lower than those in the control group (P<0.05). Conclusion Levofloxacin combined with Tanreqing injection which is beneficial for regulating the levels of CRP and PCT and promoting the prognosis of disease, can obviously improve the severity of CAP patients.