High densities of allergenic fungal spores of the genus Cladosporium and Alternaria may be present in the air in case of dry and warm weather.
These spores may induce respiratory problems in sensitized persons.
Good to know:
For Cladosporium 3.000 spores per m ³ are sufficient to induce respiratory problems in sensitized persons. For Alternaria 500 spores per m³ are enough.