Asthma caused by pollens, house plants and dried flowers

  • Agronomist
  • ESPARTO Industry
  • Florist
  • Gardner
  • Horticulturist
  • Landscape gardner
  • Pharmacist

Amaryllis pollen, Beetroot pollen, Carnation, Diplotaxis erucoides, Esparto, Grass pollens, Gypsophila pollen, Jasmin pollen, Lathyrus odoratus pollen, Liliaceae, Lime tree pollen, Limonium tataricum, Paprika pollen, Phoenix pollen, Pyrethrum Pollen, Rapseed Pollens, Stathiphyllum, Stephanotis, Strawberry pollen, Sunflower pollen, Tulip, Weeping fig (ficus benjamina).

Directly related to the number of atopic subjects in the work force. IgE-dependent mechanism.
Employees working in intensive culture greenhouses (especially jasmine). Agricultural research workers (especially sunflowers) and all persons whose job brings them into contact with plants: florists (tulips) and the esparto industry (Stipa tenacissima). The allergens are the pollens but the leaves, bulbs and seeds may also be involved. Work in greenhouses can increase the risk as compared with work in the open air.
Pollens of the cruciferous family are also the cause of sensitisations in cultivation areas. For example, Diplotaxis erucoides or wall rocket, may cause asthma in wine-growers. Pollination of this crucifera plant occurs between March and April in between the vines. Other crucifera plants may also be implicated in different agricultural practices such as Brassica oleifera in rapeseed cultivation.
Farmers may also become sensitised to the mould Aspergillus Niger if it contaminates the crops.
In general, pollen induced asthma is typically associated with episodes of coryza. Symptoms occur due to the specific pollen present in the work place outside of the natural pollen season. Asthma can be caused by preparation of bouquets of dried flowers, cleaning leaves (ficus) or pruning (stathiphyllum). Gardeners may experience asthma attacks whilst mowing lawns (aerosol of grass pollen allergens). The phoenix plant can cause contact urticaria and asthma.
Urticaria of the forearms is on the increase. In 2001, a case of Hypersensitivity pneumonitis and extrinsic allergic alveolitis was described following contact with Stipa tenacissima (Esparto grass).
Diagnostic methods
Skin prick test and bronchial provocation test (in hospital).
RAST/CAP RAST depending upon the pollen in question.


  1. J. Allergy Clin. Immunol. 2001,108:125 - Brito FF. et al.
  2. Allergy 2001,56:679 - Garcia-Ortega P. et al.
  3. Med. Lav. 2001,92:203 - Ferrugia E. et al.
  4. J. Investig. Allergol. Clin. Immunol. 200,11:67 - Hinojosa M.
  5. J. Allergy Clin. Immunol. 1999,103:950 - van der Zee J.S. et al.
  6. J. Allergy Clin. Immunol. 1999,104:181 - Sanchez-Guerrero I. et al.
  7. Allergy 1999,54:78 - Baz et al.
  8. Allergy 1999,54:273 - Piirilä al.
  9. Allergy 1998,53,907, Vandeplas al.
  10. Allergy 1996,51:847
  11. J. Allergy Clin. Immunol. 1995,96:693
  12. Allergy Proc. 1995,16(3):415
  13. Allergy 1995,50:277
  14. Allergy 1995,50:174
  15. Allergy 1993,43:285
  16. Clin. Exper. Allergy 1992,22:501
  17. Clin. Exper. Allergy 1992,22:423
  18. Int. Arch. Allergy Appl. Immun.1984,75:44
  19. Rev. Fr. Allergol.1990,30(3):185
  20. J. Allergy Clin. Immunol.1990,86:199
  21. J. Allergy Clin. Immunol.1985,75:268
  22. J. Allergy Clin. Immunol.1985,75:164
  23. Frazier Cl. A." Occupational Asthma"Van Nostrand Reihold Ed., N.Y. 1980


As in all diagnostic testing, the diagnosis is made by the physican based on both test results and the patient history.