[Humoral immunity in children with immunodeficiency and immunosuppression].

The objective of the study was to determine the immunological characteristics of immunodeficiency and immunosuppression in children and to estimate the type of disorder within the immunological system. In the prospective study with 90 patients included, all were separated into three groups (30 patients per group) of which the first group was formed of patients with immunodeficiency; the second group of patients who were receiving the immunosuppressive therapy for autoimmune diseases for more than 6 months; and the third group being the control group formed of patients with uncomplicated bacterial infections. The follow-up parameters were gathered using questionnaire on personal and family anamnesis of patients with immunological parameters: humoral unspecific immunities (CRP, C3, C4, IL1 and IL2), humoral specific immunities (IgG, IgM, IgA and IgE) and cellular specific immunity. Concentrations of medium values of CRP in patients with immunodeficiency and on immunosuppressive therapy, statistically are significantly lower than in patients from the control group (p < 0.05). Individually increased concentrations of CRP within the groups are the indicator of acute inflammatory process and of relapse of basic disease in patients with autoimmune diseases. The concentrations of IL1 are lower than standard values in the test. in 28 patients (93%) with immunodeficiency and in 26 (87%) patients with immunosuppression. Increased concentrations in 2 (7%) patients with immunodeficiency are sign of acute inflammatory process, and 4 (14%) patients with immunosuppression and increased concentrations have shown signs of inflammation and relapse of basic disease. Concentration of IL2 in 1 (3%) patient from immunosuppressed group was increased (iatrogenic immunosuppressant). There is no statistically significant difference in concentrations of medium values of C3 and C4 complements among the studied groups of patients (p > 0.05). Concentrations of IgG in group of patients with immunodeficiency are statistically and significantly lower at medium and individual values (p < 0.001), as well as the concentrations of IgM and IgA (p < 0.05) comparing to other studied groups. Concentrations of IgE above 4.500 IU/ml were found in 3 (10%) patients with Hyper IgE syndrome. Results of our study have shown the possibility of evaluation of the level and the scale of disorder of the immunological system in children.