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1.
Shokuhin Eiseigaku Zasshi ; 64(3): 108-110, 2023.
Article in Japanese | MEDLINE | ID: mdl-37380480

ABSTRACT

A simple method of identification using a color reaction was developed for Omphalotus guepiniformis. Only Omphalotus guepiniformis turned turquoise green. Other edible mushrooms resembling the mushroom did not change color when the beam reagent (5 w/v% potassium hydroxide ethanolic solution) was dripped onto the mushroom pileus. Furthermore, ethanol extract and mock cooking products of this mushroom exhibited the same color reaction. These results demonstrate this method as useful for identifying Omphalotus guepiniformis during mushroom hunting or during investigations of food poisoning.


Subject(s)
Agaricales , Foodborne Diseases , Cooking , Ethanol , Humans
2.
Shokuhin Eiseigaku Zasshi ; 64(6): 232-235, 2023.
Article in Japanese | MEDLINE | ID: mdl-38171894

ABSTRACT

Simple identification using a color reaction was applied to investigate poisoning, putatively caused by Omphalotus guepiniformis. Some leftover uncooked mushrooms had turned turquoise green when a beam reagent (5 w/v% potassium hydroxide ethanolic solution) was dripped onto the mushroom pileus. Furthermore, ethanol extract of the mushrooms exhibited the same color reaction. Then, illudin S, a toxic compound contained in O. guepiniformis, was detected in uncooked leftover mushrooms using LC-MS/MS analysis. Therefore, this case was inferred as caused by O. guepiniformis. These results indicate the identification method described above as useful for screening tests for investigating food poisoning caused by O. guepiniformis.


Subject(s)
Agaricales , Foodborne Diseases , Mushroom Poisoning , Humans , Chromatography, Liquid/methods , Tandem Mass Spectrometry , Foodborne Diseases/diagnosis , Foodborne Diseases/etiology , Mushroom Poisoning/diagnosis , Mushroom Poisoning/etiology
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