A nasty stomach bug has now spread to nine states and made nearly 300 people sick.
The states are mostly in the Midwest & Northeast:
The bug is caused by a parasite called Cyclospora.
The CDC can't nail down the source, but says it comes from contaminated food or water and cannot be spread person-to-person.
Symptoms include diarrhea (sometimes explosive), stomach cramps, nausea and fatigue.