Abstract: Objective To investigate the correlation between 16S rRNA gene high-throughput sequencing of induced sputum and serum immune factors in children with bronchial asthma at different stages. Methods From April 2019 to May 2021, 96 children with bronchial asthma who were treated in Chengdu Shuangliu District Maternal and Child Health Hospital were selected, which covered 46 remission cases and 50 acute cases.In addition, 40 healthy children who underwent physical examination at the same time were selected as the controls group. MiSeq high-throughput sequencing platform was used to sequence the 16S rRNA gene in induced sputum from three groups of children, and the level of IL-4, IL-10, IL-17 and IFN-γ in three groups of children was detected by enzyme-linked immunosorbent assay. Results The results correlation analysis showed that Shannon index was negatively correlated with IL-4 and IL-17 in children with bronchial asthma (P＜0.001), Shannon index was positively correlated with IL-10 and IFN-γ (P＜0.001); Ace index was positively correlated with IL-4 and IL-17 in children with bronchial asthma (P＜0.001). Ace index was negatively correlated with IL-10 and IFN-γ(P＜0.001). Conclusions The airway microecology of children with bronchial asthma is obviously dysregulated.

Key words: bronchial asthma, Shannon index, Ace index