Summary
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.
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Negrini, A.C., Voltolini, S., Troise, C. et al. Comparison between Urticaceae (Parietaria) pollen count and hay fever symptoms: assessment of a «threshold-value». Aerobiologia 8, 325–329 (1992). https://doi.org/10.1007/BF02272893
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DOI: https://doi.org/10.1007/BF02272893