<The machine buzzes for a few moments before Wizbang's voice breaks through.>
Interesting! The source of this corruption definitely came from something external--no surprises there--but it appears that in this case they've been eating something foul. A large mammal probably. Most likely a bear.
Search the beach for a bear carcass for me. Slightly east of there would make the most sense, on the inland side of the beach. Bring me the sample back at town.