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Offlinelactate
simian

Registered: 05/05/14
Posts: 2
Last seen: 8 years, 30 days
Poison oak in in the sub
    #22128826 - 08/22/15 09:54 PM (8 years, 5 months ago)

Hey everyone,
first of all thanks to everyone who contributes and participates in these forums. These have are such an incredible resource and the world is better for them  :iloveyou:

An edible mushroom cultivator got a rash, probably from poison oak in the donkey poo.

The donkey most likely was munching on some poison oak, and the urushiol(allergenic oil) made it thru into the poo.

question is would fungi grown on such a substrate break down the oils, or would they be potentially dangerous to eat?

if no one answers, experiments will be carried out with epi pen on hand

thanks yall


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InvisibleToadstool5
A Registered Mycophile
Male User Gallery


Registered: 01/22/15
Posts: 1,359
Loc: The Golden State
Re: Poison oak in in the sub [Re: lactate]
    #22130426 - 08/23/15 11:09 AM (8 years, 5 months ago)

Quote:

Laccase was first characterized from the latex of the Japanese lacquer tree (Rhus
vernicijha) as the thermolabile substance responsible for catalysing the oxidative polymerization of lipophilic alkene-catechol compounds (e.g. urushiol) to form a hard black lacquer (summarized by Schubert, 1965). Laccase is of widespread distribution in fungi.
Increased phenol oxidase activity and pigmentation have often been reported to be associated with rapid cell growth and with the formation of primordia and their subsequent growth to fruiting bodies in both basidiomycetes (Leonard & Phillips, 1973; Wood & Goodenough, 1977; Wood, 1980) and ascomycetes (Esser, 1968; Wong & Willetts, 1974), and also in the
development of sporangiophores of the slime mould Physarum polycephalum (Daniel, 1963).




Most species of basidiomycota will break it down especially lentinula edodes but whether or not it is fully decomposed I am not sure. Allergies can be induced with very small amounts of exposure so do carry the pen and be careful! My dad was horribly allergic to it so i feel your pain :lol:


--------------------
If you do not know where the mushroom products you are consuming are grown, think twice before eating them. :badshroom:
- Paul Stamets

AMU Teks :mushroom2: Stro's Write Ups


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Offlinemackrel
Stranger
Registered: 08/15/15
Posts: 25
Last seen: 8 years, 4 months
Re: Poison oak in in the sub [Re: lactate]
    #22132480 - 08/23/15 07:16 PM (8 years, 5 months ago)

I would be surprised if the mushroom would uptake but not use urushiol in the fruiting body. I would also be interested to find out if it lasts through the pasteurization process as its melting temp is 140 F and it is an oil so i would imagine it wouldn't hang around in the dung for very long during pasteurization. I wouldn't experiment with it without some quantitative testing like GC or MS if I had an alergy though (unless it was a mild one).


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Offlinelactate
simian

Registered: 05/05/14
Posts: 2
Last seen: 8 years, 30 days
Re: Poison oak in in the sub [Re: mackrel]
    #22137933 - 08/24/15 10:19 PM (8 years, 5 months ago)

Thanks guys!

Ahh reassuring science. My hunch is also that it will not be an issue, and I am glad its not a certain danger :thumbup:

I will carefully rub it on my sensitive friend before consuming it hehehe.

fyi for anyone with similar questions;the universal edibility test:

http://adventure.howstuffworks.com/universal-edibility-test.htm


:dancer:


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InvisibleToadstool5
A Registered Mycophile
Male User Gallery


Registered: 01/22/15
Posts: 1,359
Loc: The Golden State
Re: Poison oak in in the sub [Re: lactate]
    #22141011 - 08/25/15 02:09 PM (8 years, 5 months ago)

Quote:

I will carefully rub it on my sensitive friend before consuming it hehehe.




:rofl: the old school way of testing

Let us know how it turns out so we have more information, allergies are very important and I'm very interested if poison oak can be quickly composted and neutralized by mycelium.


--------------------
If you do not know where the mushroom products you are consuming are grown, think twice before eating them. :badshroom:
- Paul Stamets

AMU Teks :mushroom2: Stro's Write Ups


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