HARRISBURG, Pa. (AP) — The Pennsylvania Game Commission says it's detected chronic wasting disease in a white-tailed deer for the first time in a year.

The game commission said Thursday that the positive sample came from a 11/2-year-old buck struck on Interstate 99 in November.

It says the positive test is unlikely to have much impact on hunters. The buck was killed within a 900-square-mile disease management area in south-central Pennsylvania that includes two sites where chronic wasting disease was previously detected.

Some deer samples collected in 2013 haven't been tested.

The state Department of Agriculture announced Pennsylvania's first known case in 2012, from a 3-year-old captive doe in Adams County.

After that, two deer killed in Blair County and one in Bedford County by hunters during the 2012 season tested positive.