Airborne olive pollen counts are not representative of exposure to the major olive allergen Ole e 1

Galan C., Antunes C., Brandao R., Torres C., Garcia-Mozo H., Caeiro E., ...More

ALLERGY, vol.68, no.6, pp.809-812, 2013 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 6
  • Publication Date: 2013
  • Doi Number: 10.1111/all.12144
  • Journal Name: ALLERGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.809-812
  • Keywords: allergy, enzyme-linked immunosorbent assay, HIALINE, model, EUROPAEA POLLEN, BIRCH POLLEN, OLE-E-1
  • Bursa Uludag University Affiliated: Yes


Pollen is routinely monitored, but it is unknown whether pollen counts represent allergen exposure. We therefore simultaneously determined olive pollen and Ole e 1 in ambient air in Cordoba, Spain, and Evora, Portugal, using Hirst-type traps for pollen and high-volume cascade impactors for allergen. Pollen from different days released 12-fold different amounts of Ole e 1 per pollen (both locations P<0.001). Average allergen release from pollen (pollen potency) was much higher in Cordoba (3.9pg Ole e 1/pollen) than in Evora (0.8pg Ole e 1/pollen, P=0.004). Indeed, yearly olive pollen counts in Cordoba were 2.4 times higher than in Evora, but Ole e 1 concentrations were 7.6 times higher. When modeling the origin of the pollen, >40% of Ole e 1 exposure in Evora was explained by high-potency pollen originating from the south of Spain. Thus, olive pollen can vary substantially in allergen release, even though they are morphologically identical.