The ciliostatic activity of exo- and endometabolites of 243 filamentous fungal strains was evaluated by in vitro bioassay using tracheal organ cultures of 1-d-old chicks. Chloroform-extractable metabolites produced in the cultivation medium (25 degrees C/10 d) by 30 out of 72 (41%) investigated strains displayed the ciliostatic activity as did metabolites from the biomass of the spores and the mycelium of 46 other strains (26%). This result could contribute to the clarification of the correlation between fungi and respiratory disorders in some working places and in damp dwellings.

Institute of Preventive and Clinical Medicine Institute of Preventive and Clinical Medicine Bratislava Stovakia

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Molds on house walls and the effect of their chloroform-extractable metabolites on the respiratory cilia movement of one-day-old chicks in vitro