目的:探讨血清降钙素原(PCT)检测在儿童呼吸道感染的临床价值。方法:选择我院儿童呼吸道感染患儿40例,静脉采血检测PCT、CRP、WBC,同时进行血培养、痰培养或咽试子培养、呼吸道病毒抗体IgG和IgM、肺炎支原体抗体IgM,治疗后复查PCT。结果:细菌感染患儿30例,其他感染10例,细菌感染PCT阳性率显著高于非细菌感染组(P<0.05);经抗生素治疗后PCT阳性率明显低于治疗前(P<0.05)。结论:PCT作为临床炎症标志物,PCT具有早期敏感特异性,有助于病情的早期评估,预后评价及疗效观察。 Objective: To investigate the clinical value of serum procalcitonin (PCT) detection in children with respiratory tract infection. Methods: Forty children with respiratory tract infection in our hospital were selected. Venous blood samples were collected for detection of PCT, CRP and WBC. Blood culture, sputum culture or pharyngeal subcultures were also performed. Respiratory virus IgG and IgM, IgM of Mycoplasma pneumoniae were detected. PCT. Results: 30 cases of bacterial infection in children and 10 cases of other infections, the PCT positive rate of bacterial infection was significantly higher than non-bacterial infection group (P <0.05); PCT positive rate after antibiotic treatment was significantly lower than before treatment (P <0.05). Conclusion: PCT, as a marker of clinical inflammation, has early sensitivity specificity for PCT, which is helpful for the early assessment of disease, prognosis evaluation and curative effect observation.