目的研究血清降钙素原检测指导儿科感染性疾病的诊断意义。方法 100例感染性疾病患儿,按照临床诊断分为细菌感染组53例和病毒感染组47例,所有患儿接受血清降钙素原(PCT)检测,评估降钙素原对儿童感染性疾病的指导诊断意义。结果细菌感染组患儿降钙素原阳性率84.91%明显高于病毒感染组14.89%,差异有统计学意义(P<0.05)。结论降钙素原检测对儿科感染性疾病诊断具有指导意义。 Objective To study the diagnostic value of serum procalcitonin in the detection of pediatric infectious diseases. Methods One hundred cases of infectious diseases were divided into bacterial infection group (n = 53) and virus infection group (n = 47) according to the clinical diagnosis. All children received serum procalcitonin (PCT) test to evaluate the effect of procalcitonin on children’s infectious diseases The guiding diagnostic significance. Results The positive rate of procalcitonin in children with bacterial infection was 84.91%, which was significantly higher than that in virus infected group (14.89%, P <0.05). Conclusion The detection of procalcitonin has guiding significance for the diagnosis of pediatric infectious diseases.