From a tabulation of reports on the occurrence of Pullularia, it appears that this fungus may be found especially abundantly in the sub-tropical, humid areas of the world but also frequently in the temperate, humid regions.

Where do you find Pullularia?

Pullularia. A common bathroom mold. Found everywhere spring through fall.

Where does aureobasidium grow?

Aureobasidium is found in temperate-zone air, where respirable-sized conidia of A. pullulans are mostly emitted from plants {2224}, however, it has also been detected in regions without abundant plant material, even in the Artic {2224; 4041}.