title: [Ragweed in France and the Rhône-Alpes region (Lyon, Bourgoin, Grenoble, Roussillon].
abstract: Ragweed in France is a rather recent pollen which causes strong allergies on the populations concerned. This pollen, mainly located in the area Rhone-Alpes, extend more and more on totality of France. Indeed, the pollinic data highlight the presence of ragweed on all the territory with very low, as for Brittany, to several hundreds grains in the area of Rhone-Alpes. So four towns of this area have followed closely the extend of this pollen during the year 2002 through five pollen-traps (2 for the town of Lyon). The trap of Lyon I (Gerland) made it possible to follow temporal the extend of ragweed from 1987 to 2002 and the increase of the number of grains as that of the number of days with a significant allergic risk. The study shows also the differences in quantity of pollens, the differences between the daily allergic risks of the five sites, as well as the differences, between the cities, of the number of days when the allergic risk is significant. It is necessary that pollen of ragweed can be followed closely because of its strong allergenic capacity, in the area of Rhone-Alpes, where the plant prevails mainly, but also on the totality of the own territory, this to supervise its evolution and the speed of proliferation of the plant.
authors.affiliation: RNSA, Chemin des Gardes, BP 8, 69610 Saint-Genis-l'Argentière.
authors.forename: M
authors.initials: M
authors.lastname: Thibaudon
authors.forename: C
authors.initials: C
authors.lastname: Lachasse
authors.forename: F
authors.initials: F
authors.lastname: Finet
mesh_terms: D000388:Air / Q000032:analysis*; D031164:Ambrosia / Q000502:physiology; D004784:Environmental Monitoring / Q000379:methods; D062665:Epidemiological Monitoring; D005602:France / Q000453:epidemiology; D006801:Humans; D011058:Pollen / Q000009:adverse effects; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology / Q000209:etiology; D012306:Risk; D012621:Seasons
vernacular_title: L'ambroisie en France et en région Rhône-Alpes (Lyon-Bourgoin-Grenoble-Roussillon).