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There are more than 5,000 varieties of mushrooms, of which about 50–100 are known to be toxic and only 200–300 are known to be safely edible. The majority of toxic mushrooms cause mild-to-moderate self-limited gastroenteritis. A few species may cause severe or even fatal reactions. The major categories of poisonous mushrooms are described in Table II–42. Amanita phalloides and other amatoxin-containing mushrooms are discussed.


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