title: Beef-induced anaphylaxis confirmed by the basophil activation test.
abstract: Beef allergies are relatively rare, especially in adults. However, clinical manifestations can vary from urticaria, angioedema, anaphylaxis to gastrointestinal symptoms. Currently available tests, such as skin testing or in vitro determination of beef-specific immunoglobulin E (IgE), do not provide an accurate diagnosis of beef allergy. The recent development of the basophil activation test (BAT) presents a new opportunity for the diagnosis of food allergies. Here, we report a 37-year-old woman with a history of recurrent generalised urticaria, nausea, vomiting and hypotension after ingestion of beef, suggesting a beef allergy. Although the skin prick test and serum specific IgE to beef, pork and milk allergens showed negative results using commercial kits, the BAT showed significant upregulation of CD203c in a dose-dependent manner compared to both non-atopic and atopic controls. To our knowledge, this is the first case study of beef allergy consisting of a non-IgE-mediated reaction. The detection of food allergies using direct basophil activation is suggested to complement conventional diagnostic tests.
authors.affiliation: Department of Allergy and Rheumatology, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Joo-Hee
authors.initials: JH
authors.lastname: Kim
authors.forename: Soyeon
authors.initials: S
authors.lastname: An
authors.forename: Jeong Eun
authors.initials: JE
authors.lastname: Kim
authors.forename: Gil-Soon
authors.initials: GS
authors.lastname: Choi
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Ye
authors.forename: Hae-Sim
authors.initials: HS
authors.lastname: Park