The National Veterinary Services Laboratory (NVSL) in Ames, Iowa, using a polymerase chain reaction (PCR) test, confirmed the initial diagnosis made by the Oregon State University Veterinary Diagnostic Laboratory. PCR is a reliable and sensitive DNA test that identifies bacteria that cause tuberculosis. Further testing is continuing at the NVSL.

The sample was collected by the owner of a private cervid facility in Eastern Oregon, who noticed abnormalities in the lung of an elk that died on the ranch. It was delivered to his veterinarian, who immediately forwarded it for laboratory diagnosis.

The herd has been quarantined. An investigation is being conducted to search for the source of the infection and determine potential exposure of other animals. Further testing will be done on all other elk in the herd and any exposed livestock to determine if there has been any spread of the disease.

The Oregon Department of Fish and Wildlife and Oregon Department of Agriculture are working together due to possible involvement of both wildlife and livestock.