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Pythium
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Pythium

chromist genus
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Article History

Pythium, genus of destructive root parasites of the family Pythiaceae (phylum Oomycota, kingdom Chromista). Pythium species have filamentous sporangia, smooth-walled spherical oogonia, and stalked antheridia. Several are often responsible for serious diseases in plants, such as damping-off and rot. P. insidiosum causes pythiosis, a rare and deadly tropical disease found in dogs, horses, humans, and certain other mammals.

This article was most recently revised and updated by Melissa Petruzzello.