APHIS Raises Positive TB Test Requirements for Reindeer

On April 25, 2016, Animal and Plant Health Inspection Service (APHIS), Veterinary Services will raise the optical density (OD) cut-off value for a positive test. The Dual Path Platform serological test for bovine tuberculosis in reindeer will be raised from the current level of 200 to 500 for a positive test result. The current OD cut-off values for all other species will remain unchanged (i.e., fallow deer at 200; elk, red deer, and whit-tailed deer at 500).

There are no other changes for sample collection, submission, or testing procedures. This change in cut-off value for reindeer is in response to a 2015 United States Animal Health Association resolution that asked APHIS to reevaluate the cut-off values to reduce the number of false positive test results.