BISMARCK, N.D. (AP) — What North Dakota's Health Department first said was the state's first case of measles in seven years has turned out to be something else.

Officials say further testing by the federal Centers for Disease Control and Prevention concluded the Burleigh County resident thought to have the disease in fact did not.

The Health Department says false-positive laboratory test results can happen, though they're rare.

North Dakota has not had a case of measles since 2011, when there was a documented case in Cass County.