A deadly threat has been identified in a Southern Illinois population of Massasauga rattlesnakes (Sistrurus catenatus).  In 2008, biologists found 3 eastern massasaugas with disfiguring lesions on and around their head.  In addition, the snakes had multiple growths and ulcers, and experienced swelling that extended throughout the skin and skeletal muscle.  Another massasauga with a similar condition was documented in the same area in 2010.  Unfortunately, all snakes died.  Cultures taken from infected individuals identified the disease causing pathogen as Chrysosporium, a soil dwelling fungus commonly found in pet reptiles but rarely seen in the wild.  To date, Chrysosporium has …