Abstract: ObjectiveTo observe the control efficiency of the plant polysaccharide oral liquid for the children with recurrent respiratory tract infection. MethodsNephelometry and indirect immunofluorescence assay were used to check out the activity of the serum immune globulin and the T cell subsets in the 102 reinfected children who were treated in Zhongshan Hospital affiliated to Dalian University from 200707 to 200807.A total of 102 cases of reinfected children were randomly divided into two groups,plant polysaccharide oral liquid treatment group (62 cases) and transfer factor oral treatment group (40 cases).Both of the two groups were treated for 3 months.Prepare 40 cases of healthy children as the healthy control group.Follow up the 102 cases for 6 and 12 months. ResultsBefore the treatment,each of functional parameters of the immune function of the reinfected children was significantly lower than the healthy control group.After 6 months` plant polysaccharide oral liquid treatment,the functional parameters were all put back or markedly improved,with the total effective rate of 98.4%.Meanwhile，after 12 months` plant polysaccharide oral liquid treatment,the effect was significantly higher than transfer factor oral treatment group,the difference being statistically significant (P<0.05). ConclusionRecurrent respiratory tract infection in children is complicated with the existence of T cells and B cells immune deficiency.Plant polysaccharide oral liquid has a wide immune activation for both the shortterm and longterm recurrent respiratory tract infection.

Key words: Respiratory tract infections/Therapy, Polysaccharides/Therapeutic use；Transfer factor/Therapeutic use, Child