Alternaria,Cladosporium : dispersion atmosphérique,rythmes nycthéméral et saisonnier

Are respiratory allergies due to atmospheric moulds a myth or a reality? The aim of the present report is to present the results obtained by the National Network of Aerobiology Monitoring (RNSA) from traps that are distributed throughout France. The results show both geographical and inter-annual variability of the dispersion of the principal airborne allergenic moulds, Alternaria and Cladosporium. Likewise, the intensity of the emission of these moulds throughout the day is not regular, and it has often been noted that there are hourly peaks, which are concomitant with certain peaks of air pollution.