Palm Beach County health officials say 10 people in the area recently have fallen ill from consuming tainted fish.
The county says the latest cases of ciguatera have ties to grouper purchased at three sources.
The U.S. Food and Drug Administration is investigating.
Ciguatera (pronounced "sig-wah-TEHR-uh") is caused by eating fish that contain toxins from reef algae.
Symptoms include vomiting, diarrhea and vertigo.
Officials say the toxins most often are found in barracuda, hogfish, red snapper and grouper.
It is the most common marine toxin disease worldwide.
The Associated Press
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