ABSTRACT
PURPOSE: The study was performed to investigate the IgG subclasses in acute febrile phase of Kawasaki disease(KD) to find correlation between selective IgG4 deficiency and incidence of KD patients. METHODS: The patients group consisted of 64 cases in acute phase of KD hospitalized from Jan. 1996 to Jul. 1999, and control group consisted of age matched 36 cases who admitted without KD. The obtained sera were measured the level of total IgG, IgM, IgA and IgG subclasses(IgG1, IgG2, IgG3, IgG4) by using Enzyme Immuno Assay and Single Radial Immuno-Diffusion method. RESULTS: The sex ratio of male to female was 1.4:1.0, and febrile days before admission was 4.6+/-2.4 days. Total levels of IgG, IgM and IgA were normal range in both groups. The levels of IgG1, IgG2 and IgG3 were not specific changes but significantly decreased the level of IgG4 in patients group as compared with control group(P<0.05). CONCLUSION: Selective decreased the levels of serum IgG4 can be one of factors to increasing the incidence of KD.