Scientists are gaining ground in the race to understand what is causing the spread of chronic wasting disease, or CWD, in deer and elk. Stuart Lichtenberg - research scientist at the University of Minnesota and co-author of a new University of Wisconsin at Madison-led report - said the team wanted to find out if deer ticks that were found on white tail deer killed by hunters carried prions, the misfolded proteins that spread the disease. "We were actually able to detect what we called 'transmission relevant doses' of CWD prions," said Lichtenberg. " ...