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Invisiblemr crisper
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Registered: 07/25/00
Posts: 928
oyster mushroom deaths in japan
    #3270805 - 10/24/04 09:36 AM (12 years, 9 months ago)

hi everybody
this was in the news today
thought someone may be interested -
http://www.yomiuri.co.jp/index-e.htm

"2 more brain fever deaths in Akita; Mushroom link eyed



Yomiuri Shimbun

Two more people were confirmed to have died and two more have been hospitalized in Akita Prefecture due to a mysterious brain fever that has claimed the lives of five men and women in Niigata and Yamagata prefectures since September.

A man in his 60s and a woman in her 40s were both diagnosed with, and later died of, the acute brain fever sometime between last month and the beginning of this month, according to the prefecture's Health Policy Division.

They both received treatment, such as dialysis for renal failure, as did the victims in Niigata and Yamagata prefectures. The man reportedly had eaten a type of edible oyster mushroom, as had one of the two individuals currently in hospital for the same illness, both of whom are experiencing renal problems.

The division received the information regarding all four people Friday night from medical institutions in the prefecture.

Officials are rushing to identify the cause of the illness and are looking into whether there are other such cases within the prefecture.

Meanwhile, Yamagata Prefecture officials confirmed Friday that a man in his 70s who was confirmed to have died from the brain fever had in fact eaten the same type of mushrooms.

Also, in Niigata Prefecture, where three residents were confirmed to have succumbed to the fever, three more people are suspected of having contracted the acute fever. The three are said to be struggling to remain conscious as a result of the disease.

All three are on dialysis, and at least one had reportedly eaten the same variety of oyster mushroom.

The Health, Labor and Welfare Ministry on Friday informed prefectural and city governments nationwide to tell people with reduced renal capacity to refrain from eating the fungi.

The ministry also said it planned to dispatch specialists from the National Institute of Infectious Diseases to Niigata, Yamagata or Akita prefectures if they so requested.

While the acute brain fever is still considered mysterious, the fact that patients diagnosed with the illness in the prefectures reportedly ate the oyster mushrooms reinforces the idea the fungi may be playing some role in the disease.

The oyster mushrooms--called sugihiratake in Japanese--have long been used in food, and have never been reported to be harmful.

But, according to Toshimitsu Fukiharu, a senior researcher at the Natural History Museum and Institute, Chiba, "The makeup of mushrooms can easily change depending on habitat and strain."

With this summer's heat, and the depletion of the natural environment due to heavy rains brought on by several typhoons, a change in the mushrooms may have occurred, creating an excessive amount of a poison whose trace amounts had previously gone unnoticed."


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OfflineBaby_Hitler
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Re: oyster mushroom deaths in japan [Re: mr crisper]
    #3271289 - 10/24/04 02:12 PM (12 years, 9 months ago)

sounds like a contam.


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Invisiblemr crisper
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Posts: 928
Re: oyster mushroom deaths in japan [Re: Baby_Hitler]
    #3272238 - 10/24/04 06:51 PM (12 years, 9 months ago)

it does but the deaths have occurred in quite different areas - about 300km apart.
these mushrooms are rarely offerred for sale in shops here, its the kind of thing people have to pick themselves.
i'll update if i find any more info


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OfflineGordoSmith
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Re: oyster mushroom deaths in japan [Re: mr crisper]
    #3276417 - 10/25/04 08:07 PM (12 years, 9 months ago)

Think its possible that these mushrooms have evolved a kind of poison?


--------------------
Wow, those are some fat ass stems.


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Invisiblemr crisper
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Re: oyster mushroom deaths in japan [Re: GordoSmith]
    #3276617 - 10/25/04 09:06 PM (12 years, 9 months ago)

i think it is an inbalance. whatever is making people sick has always been in the mushroom, just in harmless quantities.
this summer was the hottest ever recorded in japan, all the records were broken - hottest day, longest hot spell, number of days over 30degrees.
plus a record number of typhoons, number 24 is on its way.
so, the current theory is the high heat and excessive rain have caused it.
bit like the way tomatoes get sweeter with plenty of sunshine?

i'd like to know more about this 'brain fever'


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OfflineB.I.O.
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Re: oyster mushroom deaths in japan [Re: mr crisper]
    #3277536 - 10/26/04 12:54 AM (12 years, 9 months ago)

what i know is that some oysters can cause poisoning, when they are overmature with heavy sporeloads or overaged, or in correlation with consumtion of alcohol...

BiO.


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Invisiblemr crisper
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Re: oyster mushroom deaths in japan [Re: B.I.O.]
    #3278461 - 10/26/04 08:41 AM (12 years, 9 months ago)

makes sense,
most men here enjoy large quantities of sake and shochu every night.


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OfflineAnnoA
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Re: oyster mushroom deaths in japan [Re: mr crisper]
    #3282694 - 10/27/04 03:16 AM (12 years, 9 months ago)

They are not "our" oyster mushrooms(Pleurotus species) bur rather
Pleurocybella porrigens (Pers.:Fr.) Sing.



Habitat: Rotting wood, especially Cryptomeria japonica in Japan, frequently on partly burried moss-coverd branches forming dense clusters. Season fall.
Pileus: 2-10 across, white, the margin becoming wavy.
Flesh & Gills White.


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InvisibleKOPELANDIAA
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Re: oyster mushroom deaths in japan [Re: Anno]
    #3283048 - 10/27/04 06:57 AM (12 years, 9 months ago)

...we definitively have the most shitty summer-autumn this year, here in Japan...and now, the ground is shaking every night... :frown:


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Offlineragadinks
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Re: oyster mushroom deaths in japan [Re: Anno]
    #3283060 - 10/27/04 07:18 AM (12 years, 9 months ago)

> They are not "our" oyster mushrooms(Pleurotus species) bur rather
> Pleurocybella porrigens (Pers.:Fr.) Sing.
Nice mushrooms ! Have never seen any cultures here around.


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Invisiblemr crisper
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Posts: 928
Re: oyster mushroom deaths in japan [Re: mr crisper]
    #3283191 - 10/27/04 08:59 AM (12 years, 9 months ago)

this came today -
http://www.yomiuri.co.jp/index-e.htm
Mysterious brain disease claims 2 more lives

Yomiuri Shimbun

The Akita prefectural government said Monday that an additional 10 people had been diagnosed with a mysterious brain fever, and two had died. The disease, which has also struck Niigata and Yamagata prefectures, is suspected to be linked to an edible mushroom and has claimed nine lives since September.

According to the Akita prefectural government, a man in his 60s and a woman in her 70s died after suffering from the disease. Eight people, including the two, had eaten the same variety of oyster mushroom, sugihiratake, it added.

In late September, the two reportedly showed symptoms, such as limb tremors and impaired consciousness, and began medical treatment. Both required dialysis treatment for deterioration in kidney function.


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OfflineAnnoA
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Re: oyster mushroom deaths in japan [Re: ragadinks]
    #3285778 - 10/27/04 07:41 PM (12 years, 9 months ago)

>Nice mushrooms ! Have never seen any cultures here around.

I have found them a few weeks ago here in southern Austria, but according to my mushroom guide("Der grosse BLV Pilzf?hrer") the edibility is "unknown".
Lucky me!


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