Objective To investigate onset reason for unexplained sudden death in Panzhihua City in 2012.Methods The field epidemiology survey was taken to get various exposure factors of the deceased cases,and laboratory testing was performed to rule out possible causes of the known.Results This outbreak led to five deaths and one homologous case within 72 hours.These cases were of Yi nationality and had the history of eatingwhite fungusin certain family.The fifth death ate less.Villagers had the habits of eating wild...