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Skin prick testing with extensively heated milk or egg products helps predict the outcome of an oral food challenge: a retrospective analysis

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Background

Children with milk and/or egg allergy can often tolerate heated forms of these foods. Skin prick testing (SPT) with commercial extracts followed by a possible oral food challenge (OFC) are routinely performed in these children. This study evaluated the clinical utility of a negative SPT with the real extensively heated milk or egg in predicting whether a child would tolerate an OFC to the heated food.

Methods

Charts were reviewed in a single allergy clinic for any patient with a negative skin SPT to heated milk or egg, prepared in the form of a muffin. Data was collected on the success of the OFC to the muffin as well as age, sex, symptoms and co-morbidities in these patients.

Results

Fifty-eight patients had negative SPT to the heated milk or egg in a muffin. All of these children underwent OFC to the appropriate heated food in the outpatient clinic. Fifty-five of these patients tolerated the OFC. The negative predictive value for the SPT with the extensively heated food product was 94.8%.

Conclusions

SPT with heated milk or egg products was predictive of a successful OFC to the same food. Larger prospective studies are required to substantiate these findings.

Author information

Correspondence to Harold L Kim.

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This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Keywords

  • Public Health
  • Retrospective Analysis
  • Outpatient Clinic
  • Food Product
  • Clinical Utility