, Volume 8, Issue 3, pp 325–329

Comparison between Urticaceae (Parietaria) pollen count and hay fever symptoms: assessment of a «threshold-value»

  • Arsenio Corrado Negrini
  • Susanna Voltolini
  • Costantino Troise
  • Daniele Arobba


A comparison betweenParietaria pollen count and allergic symptoms of rhino-conjunctivitis in the early season was used in utilized to determine a «threshold-value» for this pollen. Clinical data were obtained from diary-cards of 34 allergic patients and pollen data from a volumetric sampling, carried out by means of a Hirst-Burkard pollen-trap. A significant correlation (r=0.98) was found between pollen count and symptom scores. Mild symptoms were registered with concentrations above 10–15 pollens/m3. Severe symptoms occurred when pollen count exceeded 80/m3/24 h., and over 90% of patients recorded symptoms. The importance of the late reactions and of the total allergenic airborne content are emphasized.

Key words

seasonal rhinitis Parietaria pollen count «threshold-value» 


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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • Arsenio Corrado Negrini
    • 1
  • Susanna Voltolini
    • 1
  • Costantino Troise
    • 1
  • Daniele Arobba
    • 2
  1. 1.Servizio Autonomi di AllergologiaGenovaItaly
  2. 2.Istituto Internazionale di Studi LiguriFinale Ligure (SV)Italy

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