microsporidian

microsporidian

noun
parasite of arthropods and fishes that invade and destroy host cells 
WordNet® 3.0, © 2006 by Princeton University.
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Encyclopedia Britannica
Encyclopedia

microsporidian

any parasitic fungus of the phylum Microsporidia (kingdom Fungi), found mainly in cells of the gut epithelium of insects and the skin and muscles of fish. They also occur in annelids and some other invertebrates. Infection is characterized by enlargement of the affected tissue.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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