Question of the Day – Thursday February 7, 2019

Question – The reference cited below notes between the years 1992 and 1998, “several patients in the U.S. Pacific Northwest developed anorexia, malaise, nausea, vomiting, abdominal cramping, diarrhea, diaphoresis, and vertigo within 30 mins to 12 hrs of consuming a particular raw or cooked mushroom”. Reportedly, many of the poisoned patients were seeking the edible white matsutake mushroom, Tricholoma magnivalere. What mushroom species was responsible for this outbreak of mushroom related illness?

Answer- Amanita smithiana. (Diaz J H. Syndromic diagnosis and management of confirmed mushroom poisonings. 2005 Crit Care Med 33(2):427-436)