Fungal Snake Disease

First characterized in 2008, the disease has now been documented across the US from East coast to West.
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"SFD is a newly emerging disease in snakes. Cases may be mild to life-threating. Visible signs may include scabs, skin ulcers or nodules, crusted scales, discolored scales, cloudy eyes and a swollen or disfigured face. The infection may cause the upper layer of infected skin to shed repeatedly. Affected snakes are often emaciated, possibly due to decreased ability to capture prey, and often rest in open, unprotected areas where they are exposed to adverse weather and predators."

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Although SFD has caused significant mortalities in species of conservation concern, such as the Timber Rattlesnake (Crotalus horridus) and federally threatened Eastern Massasauga (Sistrurus catenatus), other species may only exhibit mild infections."