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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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Diversity of Protists II

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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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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Studying Cryptosporidium Infection in 3D Tissue-derived Human Organoid Culture Systems by Microinjection
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Cystoisospora and cyclospora.

Pedro Legua1, Carlos Seas

  • 1Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.

Current Opinion in Infectious Diseases
|August 29, 2013
PubMed
Summary

Recent advances improve understanding and diagnosis of cystoisosporiasis and cyclosporiasis outbreaks. New molecular tools aid early detection and disease control, though transmission and persistent infection knowledge gaps remain.

Area of Science:

  • Medical Parasitology
  • Infectious Diseases
  • Epidemiology

Background:

  • Cystoisospora belli and Cyclospora cayetanensis are significant enteric protozoan parasites.
  • Outbreaks of cyclosporiasis and cystoisosporiasis occur globally, with travel-associated and domestic cases reported in the US.

Purpose of the Study:

  • To review recent epidemiological and diagnostic advancements in cystoisosporiasis and cyclosporiasis.
  • To highlight the impact of new diagnostic technologies on disease management.

Main Methods:

  • Literature review of recent studies on cystoisosporiasis and cyclosporiasis.
  • Analysis of epidemiological data and diagnostic methodologies.

Main Results:

  • Continuous global outbreaks of these parasitic infections are documented.

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  • New molecular diagnostic methods enable accurate and early detection in humans.
  • These methods show potential for reducing disease burden by identifying transmission sources.

    • Conclusions:

    • Significant progress has been made in understanding the epidemiology of Cyclospora cayetanensis and Cystoisospora belli.
    • Gaps persist regarding transmission, persistent infections in immunosuppressed individuals, and prevention strategies.
    • Molecular diagnostics offer promise for addressing these knowledge gaps and improving disease control.