Szukana fraza: [Abstract = "On the other hand, A. niger is a species of mould that may appear in infected space along with mites \(Acarina\) increasing the number of allergens in the housing environment. In the performed tests, the Cladosporium herbarum proved to be the least toxic species of mould, what is good news for the inhabitants of the infected buildings, since the fungus in question is very common in housing con\-struction, its frequency value being 5."]