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Characteristics of beef allergy in schoolchildren in Turkey

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Background:

The prevalence of immunoglobulin E (IgE) mediated beef allergy in childhood is unknown. We investigated the prevalence and characteristics of IgE-mediated beef allergy in urban schoolchildren.

Methods:

This cross-sectional study recruited 6000 randomly selected urban schoolchildren ages 6‐17 years from the city center of Giresun in the eastern Black Sea region of Turkey during 2013. Children with suspected IgE-mediated beef allergy, determined by a self-administered questionnaire, after providing written consent, were skin-prick tested with commercial beef and cow's milk solutions and prick-prick tested with raw, boiled, and fried beef. Levels of serum-specific IgE to beef specific IgE and serum-specific IgE to cow's milk were determined by using fluorescent enzyme immunoassay. All children with suspected beef allergy were invited for a double-blind, placebo controlled food challenge (DBPCFC) to determine the prevalence of IgE-mediated beef allergy.

Results:

The response rate to the questionnaire was 82.2%. The estimated prevalence of parental-reported IgE-mediated beef allergy was 2.6%. The prevalence of IgE-mediated beef allergy confirmed by DBPCFC was 0.30% (95% confidence interval, 0.18‐0.5%). Positive challenge responses were observed in 70.6% (p = 0.027), 76.9% (p = 0.027), and 73.3% (p = 0.028) of the children with a positive family history of beef allergy, positive skin test results, and positive beef specific IgE values, respectively. A beef specific IgE value of >5 kUA/L alone or a combination of a positive family history of beef allergy, positive skin test results, and beef specific IgE values of >3 kUA/L yielded a positive response to DBPCFC.

Conclusion:

The presence of a family history of beef allergy, beef specific IgE value, and skin test result positivity are independently associated with positive DBPCFC results, and combined evaluation of these three parameters increased the positive predictive power of the tests.
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Keywords: Double-blind placebo controlled food challenge; IgE-mediated beef allergy; prevalence; skin-prick test; threshold values

Document Type: Research Article

Publication date: January 1, 2018

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  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma and by having the potential to directly impact the quality of patient care. AAP welcomes the submission of original works including peer-reviewed original research and clinical trial results. Additionally, as the official journal of the Eastern Allergy Conference (EAC), AAP will publish content from EAC poster sessions as well as review articles derived from EAC lectures.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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