Abstract:Objective To investigate the effect of microecological preparation combined with Helicobacter pylori on children with Hp positive abdominal Schoenlein-Henoch purpura and its influence on intestinal flora.Methods The clinical data of 110 children with Hp positive abdominal AP from October 2018 to January 2018 were analyzed retrospectively. They were divided into control group and observation group, 55 cases in each group, according to whether they were given probiotics. Both groups received anti-Hp triple therapy and conventional drug treatment. The clinical effect, negative conversion rate, and total incidence of adverse reactions were compared between the two groups. The levels of E. coli, Bifidobacterium, Lactobacillus, faecal coccus, and staphylococcus were detected by fluorescent quantitative polymerase chain reaction before and after treatment. The levels of limulus lipopolysaccharide (LPS), procalcitonin (PCT), and tumor necrosis factor (TNF-α), Th1/Th2 cytokines [Interleukin-4 (IL-4) and IFN-γ] were measured.Results The total effective rate of the observation group was higher than that of the control group (P < 0.05). After treatment, there was no significant difference in Hp negative conversion rate and total incidence of adverse reactions between the two groups (P > 0.05). The difference of intestinal Bifidobacterium, Escherichia coli, Lactobacillus, Staphylococcus, and faecal coccus before and after treatment in observation group was higher than that in control group (P < 0.05). The difference of Serum PCT, LPS, and TNF-α in the observation group was higher than that in the control group (P < 0.05). The difference of serum IFN-γ and IL-4 in the observation group before and after treatment was higher than that in the control group (P < 0.05). There was no significant difference in the total incidence of adverse reactions between the two groups (P > 0.05).Conclusion The clinical effect of probiotics combined with anti-Hp in children with Hp positive abdominal AP is definite, which can effectively improve intestinal flora and Th1/Th2 cells balance and improve intestinal mucosal barrier function.