[Ragweed pollen counts (P. Cour collection apparatus) from Lyon-Bron from 1982 to 1989: results, informing the public].
Lyon: Ragweed (R) Pollens (P) account for 6.26% of all P and caused 25% of all the pollinosis. The Lyon-Bron P counts (C) have been analysed and computerized by the CNRS in Montpellier since 1982. They are financed by the French association for ragweed study (AFEDA), with the support of the Conseil général du Rhône. Each year, doctors in the Rhône-Alpes Region receive the P calendar via a firm or pharmaceutical company which prints and distributes them. As from 1986, this information is also published by the Regional Meteorological Office at Lyon-Bron and is available on Minitel: 36-15 MTOLY ALLE. The availability of this data, in real terms, is of immediate use to patients and doctors alike. Observation has shown that peaks occurs on 5th or 6th W after onset according to the fact that the onset value of 0.1 Gr/m3 W doubles or not during the following W; that once a threshold of 5 grains (Gr) per m3 is attained, the number of Gr is greater than 100.3 weeks (W) later. This tends to be the W of peak intensity, except in 1987. This peak occurs form the 35th to the 38th W. The linear regression, calculated on a basis of average P values during the 13 W of the P season, W 31 to W 43, is y = 0.1142x + 42.7911. One may provisionally conclude, in view of the straight gradient, that in spite of the spread of R over a wider geographical area, the average quantity of R Gr per m3 of air has not increased in Lyon since 1982.(ABSTRACT TRUNCATED AT 250 WORDS)
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D000388:Air / Q000032:analysis*; D000485:Allergens / Q000302:isolation & purification*; D016208:Databases, Factual; D005602:France / Q000453:epidemiology; D006801:Humans; D007255:Information Services; D009656:North America; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology / Q000209:etiology; D012621:Seasons
D000485:Allergens
Comptes polliniques d'Ambroisies (capteur de P. Cour) de Lyon-Bron de 1982 à 1989: résultats, information au public.