Tokyo Food Safety Information Center » Good things to know » Molds and mycotoxins » Pichia (Hansenula)
Pichia (Hansenula)
This is a representative film yeast, which forms films during growth on the surfaces of liquids such as pickle liquids, but forms milky white, round or hill-shaped colonies on nutrient agars and some solid foods. When proliferating on foods such as cakes, breads, and inari-zushi, Pichia produces ethyl acetate (a sweet-smelling chemical found in household solvents such as nail polish remover, glue, or paint, etc.). This bacterium is detected from pickled products, juices, syrups, etc.
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Representative strains: Pichia anomala (P.anomala) Pichia subpelliculosa (P.subpelliculosa) |
 Aureobasidium pullulans gathering on orange jellyPichia gathering on brown sugar sponge cake |
 Photomicrograph of Pichia anomala |