| Microorganism | Result |
| Aspergillus niger ATCC 10549 | + |
| Aspergillus alliaceus UI 315 | -- |
| Aspergillus flavipes ATCC 11013 | -- |
| Aspergillus flavipes ATCC 16795 | -- |
| Congronella butleri ATCC 22822 | + |
| Rhodotorula rubra ATCC 20129 | + |
| Fusarium oxysporum ATCC 7601 | + |
| Debaryomyces polymorphus ATCC 20280 | + |