prorozoans trophozoite
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Questions and Answers

MOTILITY: progressive fingerlike

KARYOSOME: small and central

PERIPHERAL CHROMATIN: fine and evenly distributed

CYTOPLASM: finely granulate

CYTOPLASMIC INCLUSIONS *OTHER INFOS: ingested RBCs (only diff between E. dispar)

  • Entamoeba GINGIVALIS
  • Entamoeba HISTOLYTICA (correct)
  • Entamoeba COLI
  • none of the above

    • MOTILITY: non progressive fingerlike KARYOSOME: small and central PERIPHERAL CHROMATIN: fine and evenly distributed CYTOPLASM: finely granulate CYTOPLASMIC INCLUSIONS OTHER INFOS: ingested bacteria

  • Entamoeba GINGIVALIS
  • IODAMOEBA BUSTCHLII
  • Entamoeba HARTMANNI (correct)
  • Entamoeba COLI

    • MOTILITY: sluglike, blunt KARYOSOME: large and usually centrally located PERIPHERAL CHROMATIN: absent CYTOPLASM: granular and usually vacuolated CYTOPLASMIC INCLUSIONS *OTHER INFOS: *caused PAM: primary amoebic meningoencephalitis

  • ENDOLIMAX NANA
  • IODAMOEBA BUSTCHLII
  • ACANTHAMOEBA SPP
  • NAEGLERIA FOWLERI (correct)

    • MOTILITY: non progressive blunt KARYOSOME: large, irregular, and eccentric PERIPHERAL CHROMATIN: unevenly distributed CYTOPLASM: coarse and granulated CYTOPLASMIC INCLUSIONS *OTHER INFOS: vacuoles containing bacteria

    <p>Entamoeba COLI (B)</p> Signup and view all the answers

    MOTILITY: normal stool: sluggish, non progressive / diarrheal stool: progressive, unidirectional KARYOSOME: small and central PERIPHERAL CHROMATIN: fine and evenly distributed CYTOPLASM: granular and vacuolated CYTOPLASMIC INCLUSIONS *OTHER INFOS: ingested bacteria and other food particles

    <p>Entamoeba POLECKI (B)</p> Signup and view all the answers

    MOTILITY: sluggish, spinelike KARYOSOME: large PERIPHERAL CHROMATIN: granular and vacuolated CYTOPLASM: granular and usually vacuolated CYTOPLASMIC INCLUSIONS *OTHER INFOS: *caused PAM: *caused GAE: granulomatous amoebic encephalitis and some eye infections

    <p>ACANTHAMOEBA SPP (A)</p> Signup and view all the answers

    MOTILITY: active, varying pseudopod appearance KARYOSOME: centrally located PERIPHERAL CHROMATIN: fine and evenly distributed CYTOPLASM: finely granulated CYTOPLASMIC INCLUSIONS *OTHER INFOS: leaukocytes, epithelial cells and bacteria *examined through mouth scrapings

    <p>Entamoeba GINGIVALIS (C)</p> Signup and view all the answers

    MOTILITY: sluggish, non progressive blunt KARYOSOME: large, irregular, and blotlike PERIPHERAL CHROMATIN: absent CYTOPLASM: granular and vacuolated CYTOPLASMIC INCLUSIONS *OTHER INFOS: bacteria

    <p>ENDOLIMAX NANA (D)</p> Signup and view all the answers

    MOTILITY: sluggish, usually progressive KARYOSOME: large, usually central refractive acromatic granules may/not be present PERIPHERAL CHROMATIN: absent CYTOPLASM: coarsely granular and vacuolated CYTOPLASMIC INCLUSIONS *OTHER INFOS: bacteria, yeast cells and other debris

    <p>IODAMOEBA BUSTCHLII (B)</p> Signup and view all the answers

    Balantidium coli

    <p>Trophozoite = Rotary, boring Trophozoite = Two Kidney-shaped macronucleus Small spherical micronucleus Cyst = Two Kidney-shaped macronucleus - usually present Small spherical micronucleus; may not be observable Cyst = One or two visible contractile vacuoles in young cysts; Double cyst wall; Row of cilia visible in between cyst wall layers of young cysts</p> Signup and view all the answers

    Young oocyst: Two sporoblast Mature oocyst: Two sporocysts, each containing four sausage-shaped sporozoites

    <p>sospora belli (C)</p> Signup and view all the answers

    Centrally located Fluid-filled structure Consumes almost 90% of organism

    <p>Blastocystis hominis (A)</p> Signup and view all the answers

    Study Notes

    Motility and Characteristics of Amoeba Species

    • E. dispar: Motility is non-progressive, fingerlike; karyosome is small and central; peripheral chromatin is fine and evenly distributed; cytoplasm is finely granulate; cytoplasmic inclusions are ingested RBCs.

    • E. histolytica: Motility is sluglike, blunt; karyosome is large and usually centrally located; peripheral chromatin is absent; cytoplasm is granular and usually vacuolated; cytoplasmic inclusions are notable for causing PAM (primary amoebic meningoencephalitis).

    • E. hartmanni: Motility is non-progressive, blunt; karyosome is large, irregular, and eccentric; peripheral chromatin is unevenly distributed; cytoplasm is coarse and granulated; cytoplasmic inclusions are vacuoles containing bacteria.

    • E. coli: Motility is normal in stool (sluggish, non-progressive) and diarrheal stool (progressive, unidirectional); karyosome is small and central; peripheral chromatin is fine and evenly distributed; cytoplasm is granular and vacuolated; cytoplasmic inclusions are ingested bacteria and other food particles.

    • Acanthamoeba: Motility is sluggish, spinelike; karyosome is large; peripheral chromatin is granular and vacuolated; cytoplasm is granular and usually vacuolated; cytoplasmic inclusions are notable for causing PAM (primary amoebic meningoencephalitis) and GAE (granulomatous amoebic encephalitis) and some eye infections.

    • Naegleria: Motility is active, varying pseudopod appearance; karyosome is centrally located; peripheral chromatin is fine and evenly distributed; cytoplasm is finely granulated; cytoplasmic inclusions are leukocytes, epithelial cells, and bacteria, which can be examined through mouth scrapings.

    • Balamuthia: Motility is sluggish, non-progressive blunt; karyosome is large, irregular, and blotlike; peripheral chromatin is absent; cytoplasm is granular and vacuolated; cytoplasmic inclusions are bacteria.

    • Free-living Amoeba: Motility is sluggish, usually progressive; karyosome is large, usually central, with refractive acromatic granules that may or may not be present; peripheral chromatin is absent; cytoplasm is coarsely granular and vacuolated; cytoplasmic inclusions are bacteria, yeast cells, and other debris.

    Balantidium coli

    • Young oocyst has two sporoblasts; mature oocyst has two sporocysts, each containing four sausage-shaped sporozoites.
    • Centrally located fluid-filled structure consumes almost 90% of the organism.

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    Description

    Identify the characteristics of Entamoeba, a genus of parasitic amoebae, including their motility, karyosome, peripheral chromatin, and cytoplasm. Learn about the distinguishing features of E. dispar and more.

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