Abstract
A reference extract of mugwort pollen (Artemisia vulgaris) was characterized by crossed immunoelectrophoresis (CIE), crossed radio immunoelectrophoresis (CRIE) and quantitative skin prick test (QSPT). CIE revealed that the extract contained at least 42 distinct antigens of which 24 migrated towards the anode and 18 towards the cathode at pH 8.6. A CRIE analysis of the crude mugwort pollen extract, performed with sera from 29 mugwort-allergic patients, showed that 10 antigens may be considered allergens; one was classified as a major allergen, five as intermediate allergens, and four as minor allergens. The QSPT performed on the same 29 allergic patients established that 17.4 micrograms lyophilised reference mugwort pollen extract per ml had a biological potency of 1 HEP (histamine equivalent by prick test).
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