RESUMO
Objective To observe the positive rates of five kinds of serum pancreas islet auto‐antibodies IA‐2A ,GADA ,ICA‐64KD ,ICA‐40KD ,IAA in type 1 diabetes mellitus(T1DM ) ,type 2 diabetes mellitus(T2DM ) and the normal population and their clinical significance .Methods The above 5 kinds of serum auto‐antibodies were detected in 22 cases of T1DM ,160 cases of T2DM and 20 healthy people by using the immunoblotting test .Then the detection results were analyzed .Results The positive rates of IA‐2A ,GADA ,ICA‐64KD ,ICA‐40KD and IAA were 45 .5% ,72 .7% ,45 .5% ,9 .1% and 9 .1% respectively in the T1DM group , 23 .8% ,28 .8% ,8 .8% ,3 .8% and 3 .8% respectively in the group T2DM ,and 0% in the normal control group .The IA‐2A positive rate in the T1DM group was higher than that in the healthy control group(P 0 .017) .Conclusion GADA and IA‐2A have the diagnostic value to T1DM ,GADA also has the diagnostic significance to T2DM ,GADA and ICA‐64KD have the differentiating diagnostic significance to T1DM and T2DM .