Mould-yeast dimorphism

Karl Roberts kr1 at PGSTUMAIL.PG.CC.MD.US
Wed Aug 19 07:27:22 EST 1998

The dimorphism you refer to has to do with the morphology (form) that a
mold takes given the specific environment in which it is found. A good
example of a dimorphic mold pathogen is Histoplasma capsulatum. This
fungus is a yeast at 37 C, but a mold at 20-25 C. It is generally
associated with avian carriers such as pigeons and blackbirds, grows in
dung as a mold and is transmitted as spores and dry dung become
particulate matter picked up by air currents. I don't know if this is a
common fungal pathogen in the UK, but is does infect people in the
Southeastern United States. I hope this helps a bit. I know others will
send you more.
Karl J. Roberts, Ph.D.

On Tue, 18 Aug 1998, Jonathan Witchell wrote:

> Hello!
> I'm just a visitor on this newsgroup and am relatively ignorant about
> things microbiological. I'm helping a friend without internet access to
> find the meaning of the phrase "mould-yeast dimorphism". He also needs
> an example of a fungus that exhibits it.
> I hope all this makes sense. I've spent a couple of hours searching the
> net with no success, so I hope someone here can help!
> Thanks in advance,
> Jonathan Witchell, Kent, UK.

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