Microsporidia

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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 ?
It had been reported that the hepatopancreas colour of HPND caused by infection of microsporidian Hepatospora eriocheir changed from golden yellow, light yellow to almost white from light to heavy infection.
Myositis due to the microsporidian Anncaliia (Brachiola) algerae in a lung transplant recipient.
Genetic differences in the interactions of a microsporidian parasite and four clones of its cyclically parthenogenetic host.
In animals, transmission occurs by ingestion of microsporidian spores shed into the environment through the skin, urine, or feces of infected hosts [3].
Observations on the intracytoplasmic microsporidian Steinhausia mytilovum, a parasite of mussel (Mytella guyanensis) oocytes from the Amazon River estuary.
Another method uses heat shock to cure insects of disease, an effective tool for eliminating some microsporidian species but not others.
Peroxisomal catalase in extrusion apparatus posterior vacuole of microsporidian spores.
The influence of host demography on the evolution of virulence of a microsporidian gut parasite.
In all cases, dramatic reductions in Glossosoma density [ILLUSTRATION FOR FIGURE 1A OMITTED] have been associated with increased prevalence in the population of the microsporidian Cougourdella sp.
Observations on the intracytoplasmatic microsporidian Steinhausia mytilovum, a parasite of mussel (Mytella guyanensis) oocytes from the Amazon River estuary.