Microsporidia


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Related to Microsporidia: cryptosporidium, Enterocytozoon bieneusi

mi·cro·spor·id·i·a

(mī'krō-spōr-id'ē-ă),
Common name for members of the protozoan phylum Microspora. It includes some 80 genera parasitizing all classes of vertebrates and many invertebrates, especially the insects. Several genera, such as Encephalitozoon, Enterocytozoon, Nosema, Vittaforma, Pleistophora, and Trachipleistophora have been implicated in the infection of immunocompromised humans.

Microsporidia

A phylum of ubiquitous spore-forming unicellular parasites, which have been reclassified as fungi. Microsporidia have a long polar filament and a polar cap that serves as a means of extrusion. They primarily infect infects, but crustaceans, fish and humans are not immune. Of the estimated million species of Microsporidia, 1500 have been formally named.

Microsporidia genera that cause human disease
• Brachiola—B algerae, B connori, B vesicularum.
• Encephalitozoon—E cuniculi, E hellem, E intestinalis.
• Enterocytozoon—E bieneusi (prolonged production of intra- and extracellular spores by Enterocytozoon bieneusi is not always associated with systemic disease).
• Microsporidium—M ceylonensis, M africanum.
• Nosema—N ocularum.
• Pleistophora species.
• Trachipleistophora—T hominis, T anthropophthera.
• Vittaforma species—V corneae.

Microsporidia

Parasitology A phylum of ubiquitous unicellular obligate intracellular protozoans–eg, Enterocytozoon, which infect insects and vertebrates, and humans. See Encephalitozoon species.

Microsporidia

an order of the subphylum Sporozoa characterized by having small spores and one polar capsule. Common occurrence is as parasites of arthropods and fish. Includes nosema. In finfish may cause xenomas, in crustaceans cause 'cotton flesh'.
References in periodicals archive ?
Microsporidia are "really nasty parasites, but fascinating," Keeling says.
Understanding intestinal spore forming protozoa: Cryptosporidia, Microsporidia, Isospora and Cyclospora.
The other microsporidia-like parasites identified in geoduck intestine and siphon muscle do not have all the classic characteristics of microsporidia (Garcia 2002).
Finally, the eukaryotes that became intracellular parasites, with little need of making ATP of their own, would ultimately have shed the endosymbiont almost completely Microsporidia and diplomonads would have been their descendants.
Autopsy demonstrated microsporidia in myocytes from the heart and diaphragm and the muscularis of the gut and arteries (10).
7,15,20] Routine cytochemical stains used to demonstrate microsporidia (Weber's modified trichrome, Gram stain, silver stains) revealed only rare organisms within the proliferating serosa.
To the Editor: Protozoan pathogens, including Entamoeba histolytica, Giardia, Cryptosporidium, Cyclospora, Cystoisospora, and microsporidia such as Enterocytozoon bieneusi, are well-known agents of diarrhea and a major public health problem in developing countries.
Microsporidia are spore-forming single-cell intracellular parasites, which have recently been shown to be fungi on the basis of phylogenetic analyses (1).
Shrimp with microsporidia infections were found in low prevalence (0.
Microsporidia are obligate intracellular, unicellular, eukaryotic, parasitic protists related to fungi (1).