Exam 2

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  1. This is a protozoa that possesses one or more flagella.
  2. This is the motile stage of the protozoan which feeds, multiples and maintains the colony with in the host.
  3. The stage of a protozoan life cycle offering resistance to unfavorable conditions.
  4. This is a mass of chromatin in the cell nucleus.
  5. What is the key size for an Enterobius histolytica cyst?
  6. How many nuclei does a Entamoeba histolytica cyst have?
    2-4 nuclei
  7. Enterobius histolytica ingests what?
  8. Which organism looks similar to Entamoeba histolytica and can only be distinguished via DNA analysis?
    Entamoeba dispar
  9. Entamoeba coli has how many nuclei in its cyst?
    2-8 nuclei
  10. What is the average size of Entamoeba hartmanni?
  11. Which organism is this? What is the arrow pointing to?

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    Iodamoeba butschlii. It has a large glycogen vacuole.
  12. Acanthamoeba causes what three types of illness?
    • Keratitis
    • Granulomatous amebic encephalitis (GAE)
    • Disseminated infection
  13. What organism is this? (Seen in feces) What are the diagnostic features?

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    Balantidium coli. Notice the outer cilia.
  14. What is the infectious form for Balantium coli?
    Eating cysts from contaiminated food or water.
  15. What is the average size of Balantium coli cysts?
    50 µm to 70 µm
  16. What does a parasite and ova panel consist of?
    PVA, Trichrome stain (permanent stain with FEA), and a wet mount.
  17. What is the most commonly transferred protozoa in humans?
    Giardia lamblia
  18. What is the gold standard for Crytosporidium parvum?
  19. What specimens are not appropriate when searching for Pneumocystis carinii?
    Bronchial brushings and sputums because yeast can easily be confused with this organism.
  20. 1. What organism is this? This is a sample of a biopsy of the lung.

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    2. What stain is used here and what is it staining?

    3. What form is this?
    • 1. Pneumocystis
    • 2. Toluidine Blue O, for staining the cell wall
    • 3. Cyst
  21. What is the differentiating feature between Cyclospora and Cryptosporidium?

    Cyclospora oocyst is 8-10 µm and Cryptosporidium is 4-5 µm.
  22. How often should a blood sample that has suspected malaria be collected?
    Every 6 hours for 36 hours
  23. How many merozoites does Plasmodium falciparum have?
    8-36 merozoites
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Exam 2
2014-10-16 16:37:25

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