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.
Chicago Bears great Steve "Mongo" McMichael, who is battling ALS, recently had another hospital stay in February.
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.
A Chicago mother said she has no idea how her 3-year-old son was infected with measles. He doesn't attend CPS schools and has mostly been at home.
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.