Mycotoxin production of some Aspergillus ochraceus and Aspergillus fumigatus isolated from the air

We have collected airborne fungi in houses and public facilities in Japan and currently kept about 500 strains of genus Aspergillus, which are the subjects of this study. From the collection, we chose Aspergillus ochraceus and Aspergillus fumigatus, which were isolated from the air during the period of 2003-2009 , to survey their mycotoxin production by LC/MS/MS. A. ochraceus strains were served to investigate the production of ochratoxin A and ochratoxin B, while A. fumigatus strains were to examine the production of gliotoxin and verruculogen. The results confirmed that many strains are capable of producing mycotoxins. It should be noted that some airborne spores of A. ochraceus strains were found to produce relatively high level of ochratoxin A.