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35 Cards in this Set
- Front
- Back
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If there is no peripheral chromatin present in the amoeba, that means you can rule out: |
All Entamoeba. It could be Endolimax nana or Iodoamoeba buetschlii |
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Rounded chromatoid bars are found in.. Splintered chromatoid bars are found in... |
E. histolytica cysts E. coil |
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what caused these flask shaped lesions? |
Entamoeba histolytica |
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ID |
E. histolytica Fine peripheral chromatin, fine central karyosome, fine granular cytoplasm |
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ID |
E. histolytica troph |
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ID |
E. histolytica/dispar troph |
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ID |
Entamoeba histolytica cyst 4 nuclei |
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ID |
Entamoeba histolytica cyst 3 nuclei, rounded chromatin bars |
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What species can this NOT be? why not? |
This is not Entamoeba dispar, as evidence by the injected RBC. This is E. histolytica |
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ID |
Entamoeba coli. Course cytoplasm, coarse peripheral chromatin, large eccentric karyosome |
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ID |
E. coli and not E. histo/dispar due to it having more than FOUR nuclei |
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What is the only species in the genus Entamoeba encountered in humans with more than four nuclei in the cyst stage |
Entamoeba coli |
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E. coli cyst More than 4 nuclei (only E. coli has >4) Off-center, large eccentric karyosome |
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E. polecki |
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ID |
E. hartmanii |
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Size of E. hartmanii TROPHS: CYSTS: |
Trophs: 5-12um Cysts: 5-10um |
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Sizes of E. hist/dispar TROPHS: CYSTS: |
Trophs: 12-60um Cysts: 10-20um |
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ID |
E. hartmanii 7 um! Too small for E. histolytica |
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ID Why? |
Endolimax nana Nucleus has large, irregular karyosome with No peripheral chromatin so you know its not an Entamoeba |
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ID |
Endolimax nana Large eccentric karyosome with no peripheral chromatin |
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ID |
Endolimax nana cyst 3 nuclei with large, eccentric karyosomes |
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Iodamoeba buetschlii cyst huge glycogen bubble |
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ID |
I. buetschlii No peripheral chromatin, large irregular karyosome |
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ID |
Blastocystis hominis Thats one huge vacuole with tiny nuclei around it |
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Which of the amoeba are considered to be pathogenic only based on how many are seen in the specimen? |
Blastocystis hominis Labs will rate 1+ to 4+ or rare, few, moderate, many |
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Which three amoeba cause bad brain infections |
Naegleria fowleri Acanthamoeba sp. Balamuthia sp. |
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Naegleria fowleri looks like WBC |
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(this is not a fecal smear) |
Naegleria fowleri Brain sample |
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Which amoeba is linked to contaminated contact lens solution and neti pots |
Acanthamoeba |
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ID |
Acanthamoeba troph pointy pseudopodia |
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Acanthamoeba cyst Double wall, outer wall is wrinkled |
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Acanthamoeba cyst |
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Acanthamoeba trophs |
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ID |
Balamuthia |
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Which parasitic forms are found in humans for the following organisms? Acanthamoeba Naegleria |
Acanthamoeba: Trophs & Cysts Naegleria: Amoeboid forms! (No trophs or cysts) |
