DNR to discuss chronic wasting disease Jan. 18 in Harpers Ferry & Elkader, ahead of deer tissue collection effort 1/11/2018 10:39:00 AM View Count 4816 The Iowa Department of Natural Resources (DNR) will hold a special scientific collection effort Jan. 20-28, in targeted areas of Allamakee and Clayton counties near where chronic wasting disease (CWD) has been confirmed in wild Iowa deer.