Pfiesteria

noun
Pfie·ster·ia | \ fē-ˈstir-ē-ə , fis-ˈtir- \

Medical Definition of Pfiesteria 

: a genus of dinoflagellates including one (Pfiesteria piscicida) found in waters especially along the middle and southern Atlantic coast of the United States that produces a toxin which causes skin lesions in fish, that feeds upon the lesions sometimes causing large fish die-offs, and that may cause symptoms (as skin lesions and memory loss) in humans exposed to the toxin

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