Objective To evaluate the guiding value of serum procalcitonin in antibiotic therapy of pediatric respiratory tract infection.Methods From March 2015 to March 2016,124 children diagnosed with bacterial respiratory tract infection in People 's Hospital of Zengcheng District were selected and randomly divided into observation group and control group(n = 62). Antibiotic therapy was guided by serum procalcitonin index in the observation group and the control group used conventional experience. Treatment effect ...