Dictionary > Entamoeba histolytica

Entamoeba histolytica

Definition
noun
A disease-causing anaerobic protozoan species capable of causing entamoebiasis and amebic dysentery to its host
Supplement
Entamoeba histolytica is a protozoan that belongs to the Archamoebae. Archamoebae are distinguished from the other Amoebozoa species by their lack of mitochondria. Thus, species belonging to Archamoebae are species that carry out anaerobic respiration.
The distinctive features of Entamoeba histolytica are the single nucleus with a small central karyosome, and the peripheral chromatin that is finely and regularly beaded. Sometimes it is confused with Entamoeba coli, which does not cause disease and remain commensal within its host.
Entamoeba histolytica is capable of causing entamoebiasis and amebic dysentery to its human and other primate hosts. The infective stage of this species is the cyst, which can be transmitted through ingestion. When swallowed, the cyst will release the trophozoite in the digestive tract. The parasite does not produce symptoms in most cases. However, when the trophozoites move from the mucus layer of the large intestine and reach the epithelial cell layer, they become pathogenic, causing tissue destruction, which leads to flask-shape ulcers, and eventually to bloody diarrhea. In certain instances, the trophozoites gain entry into the bloodstream and subsequently reach other organs (e.g. liver) where they cause damage as well.
Scientific classification:

  • Domain: Eukaryota
  • Phylum: Amoebozoa
  • Class: Archamoebae
  • Genus: Entamoeba
  • Species: E. histolytica

Compare:

  • Entamoeba coli
  • See also:

    • Entamoeba

    Mentioned in:

  • Protozoan
  • Canine amoebiasis
  • Weigerts iron haematoxylin stain
  • Liver abscess
  • Protozoa
  • Pulmonary amoebiasis
  • Entamoebiasis
  • Protozoan cyst
  • Liver abscess amebic
  • Amoebiasis
  • Amoebic dysentery


  • You will also like...

    Cell Respiration
    Cell Respiration

    Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

    An artistic depiction of Dunkleosteus fish
    Fish

    The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

    Chromosome Mutations
    Chromosome Mutations

    Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

    takahē
    Takahē (Porphyrio hochstetteri)

    Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..

    Genetic engineering
    Genetic Engineering Advantages & Disadvantages

    This tutorial presents the benefits and the possible adverse eventualities of genetic engineering. Know more about this ..

    Human perception in action
    Human Perception – Neurology

    This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

    Related Articles...

    No related articles found

    See all Related Topics