Card Set Information

2012-04-01 14:37:30
Clinical Practice

Clinical Practice
Show Answers:

  1. Do strongyles have an intermediate host?
  2. How do stongyles get into the host?
    L3 ingested or penetrates the skin
  3. Can strongyles undergo hypobiosis?
  4. What are the different types of hookworms?
    • Ancylostoma caninum (dog)
    • Ancylostoma tubaeforme (cat)
    • Ancylostoma braziliense (humans)
    • Uncinaria stenocephala (dog and cat)
    • Bunostomum (ruminants)
  5. What is the definitive and intermediate host for Ancylostoma caninum?
    • definitive: dogs/other canids
    • intermeditae: none
  6. What is the prepatent period for Ancylostoma caninum?
    2 - 3 weeks
  7. What is the infection site for Ancylostoma caninum?
    • larvae: dermis, respiratory tract
    • adults: small intestine
  8. What is the life cycle of Ancylostoma caninum?
    • embryonated eggs passed in feces
    • L1 hatch and transform to L3 in 3 weeks in the environment
    • L3 are ingested or penetrate the skin
  9. How do Ancylostoma caninum infect by ingestion?
    larvae go directly to the small intestines (no migration)
  10. How do Ancylostoma caninum infect via transmammary?
    larvae go directly to the small intestines (no migration)
  11. How do Ancylostoma caninum infect by skin penetration?
    • larvae penetrate the skin and enter circulation
    • they then go through the heart to the lungs
    • they are coughed up and then swallowed and travel down to the small intestines
  12. What is the pathology for Ancylostoma caninum?
    • life threatening to puppies
    • can cause enteritis, bloody diarrhea, blood loss anemia in puppies
    • can cause puppy pneumonia when they are in the lungs
  13. How much blood can a puppy lose per day with Ancylostoma caninum?
    25% of blood volume
  14. How do we control Ancylostoma caninum?
    • bitch should receive fenbendazole in the third trimester (50mg/kg/d) to attempt to kill some of the migrating larvae
    • pups should be treated with an adulticide at 2, 4, 6, and 8 weeks of age
  15. What is Ancylostoma tubaeforme?
    cat hookworm
  16. Is Ancylostoma tubaeforme more a tissue feeder than blood-sucker?
  17. What is Uncinaria stenocephala?
    Northern hookworm
  18. Is Uncinaria stenocephala zoonotic?
  19. Is Uncinaria stenocephala as pathogenic as Ancylostoma?
  20. What is Bunostomum?
    • ruminant hookworm
    • mainly in sheep and cattle
  21. How do ruminants get Bunostomum?
    ingestion or skin penetration
  22. What is the pathology of Bunostomum?
    • blood loss anemia
    • itchy (stamp feet)
  23. Where do Bunostomum migrate through?
  24. What are the different Strongyles?
    • Strongylus (large strongyles)
    • Cyathostomes (small stongyles)
    • Oesophagostomum
  25. Do strongyles have an intermediate host?
  26. How do strongyles infect?
    only by ingestion of L3
  27. Where do adult strongyles live?
    in the large intestines
  28. Which strongyles migrate?
    large strongyles
  29. Strongyles are the most important parasite of which animal?
  30. What are the different kinds of large strongyles?
    • Strongylus vulgaris
    • Strongylus edentatus
    • Strongylus equinus
  31. Where do large strongyles live in the host?
    adults live in the colon
  32. Do Stongylus migrate?
  33. Describe the life cycle of Strongylus vulgaris.
    • eggs passed in fecces
    • molts to L3 in the environment
    • ingested
    • exsheath and migrate through mesenteric arteries
    • migrate to cecum and colon
    • form nodules containing L5
    • burst out into lumen of cecum and colon
    • reproduce and lay eggs
  34. What is the pathogenesis of strongylus?
    • colic
    • nodules in walls of gut
    • ulceration of gut wall
    • thrombus and embolus formation
    • fibrosis of arteries
  35. Where do adult strongylus live?
    in large intestines
  36. How do Strongylus migrate?
    mesenteric arteries
  37. How are strongylus diagnosed?
    • eggs
    • strongyle type eggs
    • fecal flotatioin
    • Baermann apparatus (larvae)
  38. How many different species are there of small strongyles?
  39. Where do small strongyles live?
    in the colon of horses and donkeys
  40. What is another name for small strongyles?
  41. Do small strongyles migrate?
  42. Can small strongyles?
  43. Describe the life cycle of small strongyles.
    • eggs are passed in feces
    • the eggs hatch and develop to L3
    • larvae is ingested by being on grass
    • goes to intestines
    • encysts in large intestines wall (nodules)
    • enter lumen
  44. Where does hyobiosis occur for small strongyles?
    in the wall of the colon
  45. What is the pathogenesis for small strongyles?
    • worse in equines less than
    • hemorrhagic enteritis due to larval movement into/out of intestinal wall.
  46. What is Oesophagostomum?
    nodular worms
  47. Oseophagostomum is common in which species?
    ruminants and swine
  48. What are the infection sites for oesophagostomum?
    • adults: large intestines
    • larvae: pylorus to rectum in nodules
  49. What kind of life cycle do oesophagostomum have?
    direct life cycle (no intermediate host)
  50. Do oesophagostomum migrate?
  51. Can hypobiosis occur with oeophagostomum?
  52. How big are the nodules of oesophagostomum?
    1 - 5mm
  53. What is the pathogenesis for oesophagostomum?
    • watery diarrhea
    • weakness and emaciation
  54. How do we diagnose oesophagostomum?
    strongyle type egg

  55. What is this?
    Ancylostoma tubaeforme egg

  56. What is this?
    Bunostomum adults in the small intestines

  57. What is this?
    Bunostomum egg

  58. What are these?
    strongyle and round worm

  59. What is this?

  60. What is this?
    Uncinaria egg