Clustered and single sudden unexplained deaths (SUDs) by Trogia venenata exposure from SUD surveillance in 22 counties, 2006–2009, Yunnan Province, China.

*Trogia venenata ate means that at least one SUD victim in event ate Trogia venenata. Trogia venenata present means that this mushroom grew around the village.†one cluster involved 2 villages.‡1 village had single SUDs in 2007 and 2008§4 villages also had SUD clusters before 2006.