Since May 1, the CDC has received more than 1,600 confirmed domestic cyclosporiasis case reports, and is waiting to confirm more than 5,100 additional cases.
The case was flagged Friday from preliminary test results, and the potential source of the infection is still under investigation, officials said.
Health officials are alerting doctors to be on the lookout for certain types of rare, serious meningococcal infections that are on the rise in the United States.
Though vaccination has drastically reduced measles cases in the U.S., measles is still one of the leading causes of death in young children internationally.
The case is the first example of the bubonic plague in Oregon since 2015, according to the state's health authority, and plague is "rare" in the state.
Katie Sullivan, 18, had lower back pain for the past month that she thought was from her rigorous training.