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Tom McCloud mccloud-tom at worldnet.att.net
Fri Jul 20 15:59:16 EST 2001

   Mr. Julien,   There are at least 30 antibiotic substances 
known that could be produced by an A.versicolor, but 
that production also depends on the environment where 
the fungus is growing.   A natural products chemist 
could determine whether any of these toxic compounds 
are present at your site, and a toxicologist would be best 
able to determine the risk of exposure to the compounds, 
depending on which ones are present and how much of them. 
 Just briefly I see averantin, averythrin, sterigmatin and 
sterigmatocystin, cyclopiazonic acid, and others listed 
as potential products.   Depending on where you want to 
go with this,  you have some very good fungal 
taxonomists and chemists at your federal "Agriculture 
and Agri-Food Canada" offices in Ottawa.   You should easily be able
to locate their web site URL,  which  I do  not have here at home.
The task of that office is, of course, to insure that toxins do not
enter the food  supply.  I have spoken with a Dr. Keith Seifert, who
is a fungal taxonomist with the group.   He might be able to direct
you to an office better able to assist you in Quebec.   
     Tom McCloud 

On Thu, 12 Jul 2001 06:47:53 -0400, Marcel JULIEN
<marcel-julien at sympatico.ca> wrote:

>I'm a engineer practicing in  the Province of Quebec. When I was doing an
>expertise in a client¹s house I found fungus and from the analyze  we found
>that the fungus was aspergillus versicolor - ufc/g  > 30 x10exp6.
>I would  welcome  informations  and researches about the toxicity of this
>I thank you in advance for your informations  des informations
>Marcel Julien, ing
>5277, boul. Couture
>Saint-Léonard (Québec)
>Canada HIR IC9

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