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目的探讨小儿呼吸道感染继发腹泻的相关诊断及疗效。方法 将70例小儿呼吸道感染继发腹泻的患者，随机分为两组，试验组35例在常规抗病毒及敏感抗生素对症治疗的同时选用口服微生态制剂贝达飞胶囊对照组35例给予常规抗病毒及敏感抗生素的对症治疗，观察治疗3天至7天内两组继发腹泻病例数，对疗效进行分析判断。结果 试验组继发腹泻9例，发病率为25.71%，对照组继发腹泻18例，发病率为51.42%，两组比较差异有高度显著性（P<0.05）。结论小儿呼吸道感染时预防性口服微生态制剂选用贝飞达可以降低患儿继发腹泻的发生率，疗效明显，安全可靠。“,”Objective Explore the diagnosis and treatment of respiratory tract infections in children secondary to diarrhea. Method 70 cases of children with respiratory tract infection secondary to diarrhea patients were randomly divided into two groups, the test group, 35cases in the conventional anti-viral and antibiotic sensitive symptomatic treatment of oral anti-viral selection Bifico control group of 35 patients received conventional antiviralthe sensitive antibiotics symptomatic treatment, observation and treatment 3 days to 7 days, the two groups to the number of secondary cases of diarrhea, and analysis to determine the efficacy.Result The secondary test group nine cases of diarrhea, the incidence rate of 25.71%, secondary to the control group,18cases of diarrhea, the incidence rate was 51.42%, the difference was highly significant (P <0.05).Conclusion Respiratory tract infections in children the preventive oral probiotics selection Bifico can reduce the incidence of diarrhea in children, obvious effect, safe and reliable.