We've written about sarcoptic mange before when we posted about chupacabras  probably just being mangy coyotes. Apparently sarcoptic mange isn't just a problem for coyotes, it affects wolves as well. The USGS has set up what appear to be high-tech thermal imaging game cams. By using the thermal imaging they can detect the amount of heat lost due to the loss of fur on the wolves' coat. The full USGS article can be viewed here .
The resulting images, admits Cross, are unusual and captivating. But they also reveal red-colored “hot spots” that give off more heat, meaning the afflicted wolf has to get the energy lost through heat by eating more calories – that is, elk and other food. ... Sarcoptic mange was introduced into the Northern Rockies in 1909 by state wildlife veterinarians in an attempt to help eradicate local wolf and coyote populations. Scientists believe the troublesome mite that causes the disease persisted among coyotes and foxes after wolves were exterminated. Since their reintroduction into the Greater Yellowstone Ecosystem in 1995-96, wolves appeared to be free of mange until 2002.
Visit this link  to view the test thermal images produced by the USGS.