Comparison of wheat and rye flour skin prick test solutions for diagnosis of baker's asthma.

Abstract:

BACKGROUND:Skin prick tests (SPTs) play an important role in the diagnosis of baker's asthma and in the investigation of sensitization frequencies in field studies. It was the aim of our study to compare different SPT solutions for wheat and rye flour sensitization and to assess the validity of test results. METHODS:Skin prick tests with wheat and rye flour were performed in parallel with extracts from different companies and compared with the results of bronchial challenge tests with both flours (69 rye flour and 51 wheat flour challenge tests). Additionally, specific immunoglobulin E (sIgE) to wheat and rye flour were tested. SPT solutions were analysed for protein content and by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). RESULTS:Skin prick test solutions for diagnosis of wheat and rye flour sensitization from three companies differed in protein concentrations and composition with the consequence of widely differing SPT results. Sensitivity of SPTs in comparison with allergen-specific bronchial challenge as a gold standard was between 40 and 67%, specificity was between 86 and 100%, the positive predictive value (PPV) ranged from 81 to 100% and the negative predictive value (NPV) from 44 to 70%. These numbers were only marginally affected by using a combination of challenge test result and sIgE value as a more specific gold standard. CONCLUSION:Improvement and standardization of SPT extracts for wheat and rye flour is highly recommended.

journal_name

Allergy

journal_title

Allergy

authors

Sander I,Merget R,Degens PO,Goldscheid N,Brüning T,Raulf-Heimsoth M

doi

10.1046/j.1398-9995.2003.00349.x

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

95-8

issue

1

eissn

0105-4538

issn

1398-9995

pii

349

journal_volume

59

pub_type

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