Parasitology1

42 Questions | Total Attempts: 1133

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Parasitology1


Questions and Answers
  • 1. 
    Amoebae can be found worldwide. The motile, reproducing and feeding stage is called a ______; most commonly lives in lower gastrointestinal tract.
  • 2. 
    Many amoebae also form a non-feeding nonmotile stage called a __; this is the stage that is infective for man.
  • 3. 
    Transmission of cysts typically occurs through _____.
  • 4. 
    After ingestion of cysts it pass to the lower intestine and excyst and multiply as feeding ______.
  • 5. 
    To help identify cysts of amoeba, _______ stains are especially helpful since they allow us to magnify the parasite more and  and so we can better see the nucleus and other intracellular structures.
  • 6. 
    Trophozoites most commonly lives in the ______________ ______ ______.
  • 7. 
    Infection with this amoeba can be transmitted sexually by gay men causing a disease known as "gay bowel syndrome"
  • 8. 
    Entamoeba dispar is ______.
  • 9. 
    A nonpathogenic species that causes the most confusion with Entamoeba Histolytica is ____________.
  • 10. 
    The cysts and trophozoites between Entamoeba Histolytica and Entamoeba dispar are identical except that _________ ____ is non-invasive and never ingests RBCs.
  • 11. 
    Some labs will use this phrase when reporting amoeba that resemble E. histolytica, "E. histolytica / E. dispar" when no _____ are seen; this leave treatment up to the physician based on the symptoms shown by the patient.
  • 12. 
    Trophozoites of Entamoeba Histolytica are  ____- ______ um in size.
    • A. 

      11-22

    • B. 

      10-20

    • C. 

      5-15

    • D. 

      7-14

    • E. 

      9-18

  • 13. 
    The cytoplasm of the trophozoite may contain ingested ______ when it is invasive in tissue
    • A. 

      WBCs

    • B. 

      Carbohydrates

    • C. 

      RBCs

    • D. 

      Macrophages

    • E. 

      Proteins

  • 14. 
    Entamoeba Histolytica invades the intestinal wall and  multiplies in the ______ tissue.
  • 15. 
    _____ are not seen in the trophozoites of any other amoeba except Entamoeba Histolytica.
  • 16. 
    The trophozoites move by means of ________ and exhibits active, progressive motility in a saline wet mount.
  • 17. 
    The cysts of Entamoeba Histolytica contain ______ nuclei; more nuclei are seen as the cyst matures.
    • A. 

      1-7

    • B. 

      2-4

    • C. 

      3-6

    • D. 

      1-4

    • E. 

      1-3

  • 18. 
    Entamoeba Histolytica cysts are also _____ - ______ um in size and are round.
    • A. 

      10-20

    • B. 

      12-24

    • C. 

      11-22

    • D. 

      5-10

    • E. 

      2-5

  • 19. 
    The cysts in Entamoeba Histolytica may contain  _____ shaped structures known as  chromatoid bars.
  • 20. 
    Cyst formation for Entamoeba Histolytica occurs only within the ____ _____; once the stool has left the body, cyst formation does not occur.
  • 21. 
    After ingestion of a Entamoeba Histolytica cyst; no changes occur in an acidic environment such as in the stomach; once the pH becomes neutral or slightly alkaline, the encysted organism becomes active (excysts) and four separate ________ are formed and establish residence in the large intestine.
  • 22. 
    Stool must be received while it is till warm for you to see motile Entamoeba Histolytica ________.
  • 23. 
    The most important permanent stain for Entamoeba Histolytica is _________.
  • 24. 
    A minimum of ____ specimens collected over a time frame of 10 days is recommended for diagnosis of Entamoeba Histolytica.
  • 25. 
    Immunoassays using _______ antibodies are available for detecting the Entamoeba Histolytica parasite in stool samples.
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