[Multicenter study on sensitization to Alternaria mold].

The reality emerged of a non-negligible frequency of positive tests to "Alternaria". This was conducted by the inclusion of this mould in the standard allergy assessment, especially if a summer predominance of symptoms was known. A significant difference emerged between seasonal peaks which had to do with mono or polysensitisation. The highest frequency of positives was found near to humid surroundings or woods.