Trematodes

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Author:
kris10leejmu
ID:
141748
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Trematodes
Updated:
2012-03-17 21:42:58
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Lab Tech
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Lab Tech
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  1. What is another word for an unsegmented flatworm?
    trematodes
  2. What is a hermaphrodite?
    both male and female parts
  3. The first intermediate host of all the digenetic flukes is always a _____.
    snail
  4. Where are tremadotes found?
    near water
  5. What is typically the second intermediate host?
    fish, amphibian, anything that lives near water
  6. How are tremadotes diagnosed?
    large operculated ova seen with centrifugal sedimentation
  7. What are the different trematodes?
    • Fasciola hepatica
    • Paragonimus kellicotti
    • Alaria
    • Nanophyetus salmincola
  8. What are the large animal flukes?
    • Fascoila hepatica
    • Fascioloides magna
  9. Fasciola hepatica is a common _____ fluke.
    liver
  10. What is the intermediate host of Fasciola hepatica?
    semi-aquatic snail
  11. Describe the life cycle of Fasciola hepatica.
    • immature form leaves snail and encysts on water plants
    • ingested by definitive host
    • excysts (hatches)
    • migrates thru intestinal wall of definitive host
    • goes to the liver
    • goes to the bile duct
  12. How long does Fasciola hepatica migrate to the liver before maturing in the bile duct?
    6 - 8 weeks
  13. What can Fasciola hepatica cause?
    severe liver damage, may see clostridial disease
  14. What is bottle jaw?
    edema due to hypoproteinemia
  15. What is albumin?
    main protein in plasma
  16. How are humans infected with Fasciola hepatica?
    water
  17. What pathogenesis does Fasciola cause in cattle?
    bottle jaw
  18. What is the treatment for Fasciola hepataica?
    • Clorsulon
    • Albendazole
  19. How do we control Fasicola hepatica?
    • molluscicides (kill snails) with copper sulfate
    • keep stock off marshy lands
  20. Dogs and cats get Paragonimus kellicotti from ingesting _____.
    the intermediate host or transport host
  21. What is the pathogenesis of Paragonimus kellicotti?
    • 1st intermediate host is the snail
    • 2nd intermediate host is a crawfish
    • Definitive host are wild animals, dogs, and cats
  22. Paragonimus kelliotti is a _____ fluke.
    lung
  23. What can paragonimus cause?
    chronic lung disease
  24. How do you diagnosis Paragonimus kellicotti?
    large gold operculated egg in sputum using sugar flotation or cent. sedimentation
  25. What is the treatment for Paragonimus kellicotti?
    • Fenbendazole
    • Praziquantel
  26. Alaria is an _____ fluke.
    intestinal
  27. What animals are affected by Alaria?
    dogs and cats
  28. When do Alaria become pathogenic?
    when large numbers exist
  29. Describe the life cycle of Alaria.
    • snail is the first intermediate host
    • amphibian (tadpoles) are the second intermediate host
    • mice, rats, snakes, and birds may serve as a transport (paratenic) host
    • the adults infects in small intestines and the immature flukes infect the lungs
  30. How do you diagnose Alaria?
    large operculated eggs in feces from cent. sedimentation
  31. What is the treatment for Alaria?
    • Praziquantel
    • Epsiprantel
  32. Nanophyetus salmincola is _____ fluke.
    salmon poisoning
  33. What can the Nanophyetus salmincola fluke do?
    produce mild enteritis
  34. What does Nanphyetus salmincola cause?
    gastroenteritis and death
  35. What does Nanophyetus salmincola mimic?
    parvo
  36. What is the first intermediate host of Nanophyetus salmincola?
    snail
  37. What is the second intermediate host for Nanophyetus salmincola?
    salmon
  38. How do dogs get Nanophyetus salmincola?
    from ingesting raw trout and salmon
  39. How do you diagnose Nanophyetus salmincola?
    they are large operculated eggs

  40. What is this?
    trematode

  41. Life cycle of Digenetic Flukes
    • operculated egg hatches
    • penetrates snail and loses cilia
    • becomes a sporocyst - asexual reproduction
    • redia
    • cercaria
    • leaves snail and swims around to find either 2nd IH or encysts on vegetation
    • metacercariae eaten by DH
    • adult

  42. What is this?
    adult trematode

  43. What is this?
    trematode ova

  44. What is this?
    trematode ova

  45. What type of trematode is this?
    Fasciola hepatica

  46. Life cycle of Fasciola hepatica



  47. What type of trematode is this?
    Paragonimus kellicotti

  48. What type of ova is this?
    Paragonimus kellicotti ova

  49. Life Cycle of Paragonimus kellicotti

  50. What type of trematode is this?
    Alaria

  51. What type of trematode is this?
    Nanophyetus salmincola

  52. Life cycle of Nanophyetus salmincola

  53. What type of ova is this?
    Nanophyetus salmincola

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