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Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
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Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...

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Microsporidiasis.

Ahmad Ashfaq1, A Clinton White

  • 1Infectious Disease Division, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA.

Handbook of Clinical Neurology
|July 9, 2013
PubMed
Summary

Microsporidia, spore-forming organisms, can cause rare central nervous system (CNS) disease, primarily in immunocompromised individuals. Diagnosis and treatment for CNS microsporidiosis remain challenging, with limited case reports available.

Area of Science:

  • Medical Mycology
  • Infectious Diseases
  • Neuroscience

Background:

  • Microsporidia are obligate intracellular parasites.
  • Several species cause human disease, particularly in immunocompromised hosts.
  • Infections range from gastrointestinal and ocular to disseminated disease.

Purpose of the Study:

  • To review the rare manifestation of central nervous system (CNS) disease caused by Microsporidia.
  • To highlight the clinical presentation, diagnostic challenges, and treatment uncertainties of CNS microsporidiosis.

Main Methods:

  • Literature review of reported cases of CNS microsporidiosis.
  • Analysis of clinical presentations, diagnostic methods, and treatment outcomes.

Main Results:

Keywords:
Microsporidiosisencephalitozoonfumagillin

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  • Only 12 cases of CNS microsporidiosis have been documented.
  • Patients typically present with encephalitis and seizures.
  • Diagnosis often necessitates brain biopsy, though spores may be found elsewhere.

Conclusions:

  • CNS microsporidiosis is a rare but serious opportunistic infection.
  • Effective treatment strategies for CNS microsporidiosis require further investigation.
  • Early diagnosis and targeted therapies are crucial for improved patient outcomes.