Food-Dependent Exercise-Induced Anaphylaxis due to Wheat in a Young Woman

Abstract

Food Dependent Exercise-Induced Allergy is a rare condition. However, the occurrence of anaphylaxis is increasing especially in young people. The diagnosis of anaphylaxis is based on clinical criteria and can be supported  by laboratory tests such as serum tryptase and positive skin test  results  for  specific IgE  to  potential  triggering allergens. Anaphylaxis prevention needs strict avoidance of confirmed relevant allergen.  Food-exercise challenge test  may be  an acceptable method  for  diagnosis of  Food  ependent  Exercise-Induced Allergy and dietary elimination of food is recommended to manage it.
In this study, a 32 year-old woman visited the allergy clinic with a history of several episodes of hives since 11 years ago and 3 life-threatening attacks of anaphylaxis during the previous 6 months. The onsets of majority of these attacks were due to physical activity after breakfast. On Blood RAST test, the panel of common food Allergens was used and she had positive test only to wheat flour. On skin prick tests for common food allergens she showed a 6 millimeter wheal with 14 mm flare to Wheat Extract. The rest of allergens were negative.
The patient was diagnosed as wheat-dependent exercise-induced, and all foods containing wheat were omitted from her diet.
In this report we emphasized on the importance of careful history taking in anaphylaxis diagnosis.