NON-PATHOGENIC Intestinal Amoeba

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Last updated 4:36 PM on 8/29/26
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11 Terms

1
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What are the 5 NONPATHOGENIC intestinal amoebae?

  1. Entamoeba dispar

  2. Entamoeba coli

  3. Endolimax nana

  4. Entamoeba hartmanni

  5. Iodamoeba butschlii


2
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What are the CHARACTERISTICS of Entamoeba dispar both cyst and trophozoite stages?

  • NONPATHOGENIC FORM OF E. histolytica

  • 15-25um trophozoite

  • SMALL CENTRAL KARYOSOME

  • 1-4 nuclei in the cyst

  • 10-20 um cyst


3
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What are the CHARACTERISTICS of Entamoeba coli TROPHOZOITE stage

  • JUNKY CYTOPLASM

  • LARGE ECCENTRIC (non-centered) karyosome

  • HUGEEEE think “entera coli” 15-50um

  • NO/SLUGGISH MOTILITY

    • flexible pseudopod extension


<ul><li><p><mark data-color="#8a9d01" style="background-color: rgb(138, 157, 1); color: inherit;">JUNKY CYTOPLASM </mark></p></li><li><p>LARGE ECCENTRIC (non-centered) karyosome </p></li><li><p>HUGEEEE think “entera coli”<mark data-color="#a6a600" style="background-color: rgb(166, 166, 0); color: inherit;"> 15-50um</mark></p></li><li><p>NO/SLUGGISH MOTILITY</p><ul><li><p>flexible pseudopod extension</p></li></ul></li></ul><p></p>
4
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What are the CHARACTERISTICS of Entamoeba coli CYST stage?

  • 10-25um

  • FRAYED ENDS of chromatoidal bars

  • 1-8 NUCLEI

    • # of nuclei INCREASE AS MATURES


<ul><li><p>10-25um</p></li><li><p><mark data-color="#97a602" style="background-color: rgb(151, 166, 2); color: inherit;">FRAYED ENDS</mark> of chromatoidal bars</p></li><li><p><mark data-color="#aab105" style="background-color: rgb(170, 177, 5); color: inherit;">1-8 NUCLEI</mark></p><ul><li><p># of nuclei INCREASE AS MATURES</p></li></ul></li></ul><p></p>
5
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How is Entamoeba hartmanni similar to E. histolytica?

  • KNOWN AS SMALLER SPECIES OF E.histolytica

  • SINGLE PSEUDOPOD

  • FINELY GRANULAR CYTOPLASM


6
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What are the CHARACTERISTICS of Entamoeba hartmanni TROPHOZOITE stage?

  • Fine granular cytoplasm

  • 4-12um

  • ECCENTRIC karyosome

SIZEEEEE!!!!! VERY SMALL


<ul><li><p>Fine granular cytoplasm </p></li><li><p><mark data-color="#afb405" style="background-color: rgb(175, 180, 5); color: inherit;">4-12um </mark></p></li><li><p>ECCENTRIC karyosome </p></li></ul><p>SIZEEEEE!!!!! VERY SMALL </p><p></p>
7
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What are the CHARACTERISTICS of Entamoeba hartmanni CYST stage?

  • 5-10um

  • 1-4 nuclei BUT USUALLY 2

  • Also has rounded chromatoidal body

  • ECCENTRIC KARYSOME


<ul><li><p><mark data-color="#b7bc02" style="background-color: rgb(183, 188, 2); color: inherit;">5-10um</mark></p></li><li><p>1-4 nuclei BUT USUALLY 2</p></li><li><p>Also has rounded chromatoidal body</p></li><li><p><mark data-color="#c9c901" style="background-color: rgb(201, 201, 1); color: inherit;">ECCENTRIC KARYSOME </mark></p></li></ul><p></p>
8
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What are the CHARACTERISTICS of Endolimax nana TROPHOZOITE STAGE

  • VACUOLATED (not as huge as B. hartmanii)

    • WHITE SPACES

  • LARGE KARYOSOME “BALL IN SOCKET”

  • GRANULAR CYTOPLASM

  • Low to no motility

  • 5-12um


<ul><li><p><mark data-color="#bac504" style="background-color: rgb(186, 197, 4); color: inherit;">VACUOLATED (not as huge as B. hartmanii)</mark></p><ul><li><p><mark data-color="#bac504" style="background-color: rgb(186, 197, 4); color: inherit;">WHITE SPACE</mark>S </p></li></ul></li><li><p>LARGE KARYOSOME <mark data-color="#9ead06" style="background-color: rgb(158, 173, 6); color: inherit;">“BALL IN SOCKET”</mark></p></li><li><p>GRANULAR CYTOPLASM </p></li><li><p>Low to no motility </p></li><li><p><mark data-color="#c0c502" style="background-color: rgb(192, 197, 2); color: inherit;">5-12um</mark></p></li></ul><p></p>
9
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What are the CHARACTERISTICS of Endolimax nana CYST stage

  • 5-12um

  • SPHERICAL

  • Up to 4 nuclei w/ LARGE karyosome

  • NO CHROMATOIDAL BARS


<ul><li><p><mark data-color="#bdc204" style="background-color: rgb(189, 194, 4); color: inherit;">5-12um </mark></p></li><li><p>SPHERICAL </p></li><li><p>Up to 4 nuclei w/ LARGE karyosome </p></li><li><p><mark data-color="#aec505" style="background-color: rgb(174, 197, 5); color: inherit;">NO CHROMATOIDAL BARS</mark></p></li></ul><p></p>
10
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What are the CHARACTERISTICS of Iodamoeba butschlii TROPHOZOITE stage?

  • IRREGULARY SHAPED karyosome

    • w/o peripheral chromatin

  • COARSELY VACUOLATED

  • Granular cytoplasm WITH OTHER MATERIALS (bacteria, yeast)

  • 8-20um


11
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What are the CHARACTERISTICS of Iodamoeba butschlii CYST stage?

  • 6-20um

  • NO CHROMATOIDAL BARS

  • Reddish brown ONLY CYST WITH A PROMINENT GLYCOGEN VACUOLE on IODINE

    • OPEN SPACE on TRICHROME

  • Large karyosome