title: Cannabaceae pollen in the atmosphere of Brianza, Northen Italy.
abstract: OBJECTIVE
  We have noted several patients suffering for rhinitis and/or asthma symptoms in the summer months without positive skin tests for pollens blossoming in the corresponding season. So we tried to determine the pollination pattern of pollens usually not tested, because no company produces the corrisponding extract.
  
  
  METHODS
  We determined airborne pollination by means of a volumetric pollen trap for five years from 2001 to 2005.
  
  
  RESULTS
  We found, in addition to well-known aeroallergens, a significant percentage of Cannabaceae from the end of July to mid September with the highest concentration in 2004 (140 gr/m3).
  
  
  CONCLUSIONS
  The potential allergenicity of Cannabis pollen was supported in the United States, where they found some patients with rhinitis or asthma during the pollen seasons and positive prick test for Cannabis, but the clinical significance of Cannabaceae pollen as an aeroallergen in Europe is still undefined.
authors: I.N.R.C.A.--IRCCS, Pneumologic Department, Chief dott. E. Marchi, Casatenovo, LC, Italy.
authors: F Della
authors: FD
authors: Torre
authors: A
authors: A
authors: Limonta
authors: A
authors: A
authors: Molinari
authors: E
authors: E
authors: Masala
authors: S
authors: S
authors: Vercelloni
authors: E Della
authors: ED
authors: Torre
mesh_terms: D000397:Air Pollution / Q000009:adverse effects / Q000032:analysis*; D000485:Allergens / Q000009:adverse effects / Q000032:analysis* / Q000276:immunology; D027581:Cannabaceae / Q000276:immunology / Q000502:physiology*; D007558:Italy; D011058:Pollen / Q000009:adverse effects / Q000276:immunology; D006255:Rhinitis, Allergic, Seasonal / Q000209:etiology; D012621:Seasons
chemical_list: D000485:Allergens