Chronic wasting disease (CWD) has been identified in a second whitetail deer on a southeastern Minnesota farm, state regulators said Friday.

The five-year-old buck is the second deer to have been detected with CWD at a Winona County farm, according to the Minnesota Board of Animal Health, which confirmed the results with the U.S. Department of Agriculture.

Last month, the board detected the disease in a three-year-old whitetail buck during routine testing at the same farm. The board had quarantined the herd and begun an investigation into its finding of the fatal disease, the agency said.

CWD is a disease of the deer and elk family caused by an abnormally shaped protein that can damage brain and nerve tissue.

The disease is most likely transmitted when infected deer and elk shed the protein in saliva, feces, urine and other fluids or tissues.

The board has not disclosed who operates the farm.