We assessed the clinical significance of specific IgE antibodies for ovomucoid (OM), ovalbumin, ovotransferrin, lysozyme and OM third domain with (D3 CHO) or without carbohydrate chain (D3) in hen's egg hypersensitivity. Thirty-two subjects with high IgE antibody titers for egg white were divided into two groups of positive (n=19) and negative (n=13) immediate hypersensitive reactions to double-blinded placebo-controlled food challenges with freeze-dried egg white antigens. The positive challenge group showed a tendency (p<0.1) toward higher specific IgE antibody for OM than the negative challenge group. The sensitivity, specificity and accuracy for a diagnostic power of specific IgE antibody titers to OM were 89.5%, 30.7% and 65.6%, respectively. These results were better than those of the other egg white components.
Specific IgE antibodies for OM domain 3 with or without CHO was statistically higher in positive IHR group than in negative IHR group. The, sensitivity, specificity and accuracy were 89.5%, 92.3% and 90.6%, respectively, for D3 CHO and 94.7%, 69.2%, and 84.4%, respectively, for D3. These results indicate that specific IgE antibodies for D3 with or without CHO give more useful diagnostic tools in hen's egg hypersensitivity compared with OM and other egg white components.
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