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61 Cards in this Set
- Front
- Back
- 3rd side (hint)
Identify this and the structures
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Giardia cyst
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Identify this and structures
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Giardia Cyst, notice the structures
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What are these and where would you find them?
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Giardia cysts
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Giardia trophozoite.
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What are these?
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giardia trophozoite
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giardia cysts
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Various stages of E. histolytica cysts. A) An early precyst with a single nucleus. B and D) A cyst at the 2 nucleus stage. C) A mature cyst with 4 nuclei and no chromatoid bodies. Note how the nuclei decrease in size with each subsequent division. A-C are stained with trichrome and D is stained with iron hematoxylin.
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crescent-shaped gametocytes
P falciparum |
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Which plasmodium has a crescent shaped gametocyte?
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P. Falciparum
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What is this?
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P falciparum ring stage. These are early trophozoitesmay appear to have two nuclei
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Which Plasmodium have Schüffner’s dots?
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vivax and ovale
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What is the halo around the falciparum gametocyte known as?
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Laveran's bib
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Plasmodium vivax
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may have irregular ameboid appearance
reddish granules called Schueffner granules |
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What are Plasmodium parasites with 2 or more nuclei known as?
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schizont
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vivax schizont
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what is this?
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Ring-form of P. vivax have a thick cytoplasm with a single, large chromatin dot. The cytoplasm becomes amoeboid, Schüffner's dots appear as the trophozoites mature. Infected RBCs are often larger
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What are the two types of falciparum in circulation?
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ring stage and gametocytes
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What is a distinguishing feature of vivax trophozoit and schizont infection of eurythrocytes?
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Schueffner's dots will be reddish
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What are plasmodium parasites with more thatn one nucleus called?
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schizont
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trophozoite of P malariae
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compact and deeply staining, no enlargement of the host cell
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Trophozoite of vivax
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ameboid and host cell is enlarged. Schnueffer's dots
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Schizont of malariae
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rosette structure. 8-12 nuclei
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Schizont of vivax
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enlarged and has Schnueffer's dotscan contain up to 32 nuclei/merozoites
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Gametocyte of malariae
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fills entire normal sized erythrocyte
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Gametocyte of vivax
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nearly fills entire enlarged host and Schnuffer's dots present
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Composite showing various morphological forms of P. malariae. ri = ring; tr = trophozoites; sz = schizont; sg = segmenter; gm= gametocyte; p = platelets
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Schizonts of P. ovale in thin blood smears
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Composite showing various morphological forms of P. malariae. ri = ring; tr = trophozoites; sz = schizont; sg = segmenter; gm= gametocyte; p = platelets
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Composite showing various morphological forms of P. vivax. ri = ring; et = early trophozoite; lt = late trophozoite; sz = schizont; gm= gametocyte; p = platelets
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malariae schizonts
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are usually compact not enlaged
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distinguish between gametocytes of ovale and vivax
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vivax larger.
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Schizonts of P. ovale tend to be smaller and contain fewer merozoites (average 8). Elongation to an oval shape Schüffner's dots can be observed with proper staining.
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vivax schizont
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ovale schizont
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ovale rings
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T. cruzi
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African Trypanosome
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trypomastigote of African Trypanosome spp
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which Trypanosome spp has a trypmastigote dividing cycle?
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African Trypanosome. T. Cruzi does not. In T cruzi, this is the epimastigote form
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trypomastigote: kinetoplast at anterior end. nucleus in middle
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Epimastigote: kinetoplast in middle next to nucleus. This is the replicating form of T cruzi. has shorter um
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amastigote
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where are the trypomastigotes of the African trypanosomes found?
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in the blood. this is the replicating form. in the lab these are all obtained from rats or mice
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trypomastigotes of African Trypanosome. notice the replicating form
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T. gambiense and T. cruzi blood-stage trypomastigotes. notice that the Tg has a more prominate um.
The kinetopplastid seems to be larger in diameter than body or T cruzi also more often c shaped |
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What forms of T cruzi are in humans
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Trypomastigote and amastigote. Amastigote is intracellular and replicate in cell
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T cruzi amastigotes in tissue. Dont forget to identify the interior kinetoplast
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T cruzi in tissue. Notice the nuclei and kinetoplast
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In lab, where is the epimastigote of T cruzi from?
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culture smear
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typical epimastigpte T cruzi. found in vector. replicating form. kintoplast appears as bar
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In lab what are the specimens from bone marrow and liver?
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amastigotes of Leishmania
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Are the amastigotes of T cruzi and Leishmania distinguishable?
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No, must know what kind of tissue and cells. Leishmania only infect phagocytes
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Leishmania promastigotes from culture. not found in human tissue
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distinguishing T cruzi epimastigotes from Leishmania promatigote
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Promastigote does not have um and are fatter also not found in human tissue
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T cruzi trypomastigote
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T cruzi epimastigote
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P. malariae ring
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ovale rings
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ovale trophozoite
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ovale trophozoite. notice the fringe
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