 In general , poisoning incidents are unintentional and result from errors in identification . Recent cases highlight the issue of the similarity of A. phalloides to the edible paddy straw mushroom , Volvariella volvacea , with <unk> and Southeast @-@ Asian immigrants in Australia and the west coast of the United States falling victim . In an episode in Oregon , four members of a Korean family required liver transplants . Of the 9 people poisoned in the Canberra region between 1988 and 2011 , three were from Laos and two were from China . This misidentification is a leading cause of mushroom poisoning in the United States . 
