Determination of the stability of diluted allergen extracts using a concentration step prior to EAST inhibition.

BACKGROUND Generally the stability of diluted allergen extracts, as used for skin testing, provocation testing and immunotherapy can not be measured using a normal enzyme allergosorbent test (EAST) inhibition method. OBJECTIVE The aim of this study was to determine the stability of diluted allergen extracts using an ultrafiltration step prior to the… (More)