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Yeast
: A unicellular fungus that belongs to the phylum Ascomycetes, has a single nucleus ,and reproduces either asexually by budding or fission, or sexually through spore formation.
Yeastlike colony
: A soft, pasty, smooth colony; usually no filamentous (fuzzy) growth can be observed macroscopically.
Yellow fever
: An acute infectious disease caused by a Flavivirus, which is transmitted to humans by mosquitoes. The liver is affected and the skin turns yellow in this disease.
YM-shift
: The change in shape by dimorphic fungi when they shift from the yeast (Y) form in the animal body to the mold or mycelial form (M) in the environment.
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