MIC 541-Exam 5-Parisitology 14

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MIC 541-Exam 5-Parisitology 14
2013-05-07 17:14:17
MIC 541 Exam Parisitology 14

MIC 541-Exam 5-Parisitology 14
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  1. What are the common pathologies of arthropod infections?
    • Itching
    • Scabs
    • Rashes and redness
  2. Describe the morphology of Head body and pubic lice:
    • 6 legs
    • Visible to the naked eye
  3. Where does the lifecycle of Lice occur?
    Whole life on human host
  4. Where do lice gain nutrients?
    Blood of host
  5. Describe the lifecycle of lice:
    • White eggs laid by females in the hair
    • Hatch into nymphs in 10 days
    • Become adults in 14 days
  6. How long does it take for lice to become adults from the time the egg is laid?
    10 days they hatch into nymphs and 14 more days they become adults = 24 days
  7. How are lice transmitted?
    Direct contact or fomites
  8. What is the treatment for lice?
    • remove with fine comb
    • treat hair with pyrethrin (NIX or RID) for 10 minutes
    • Treat for 7-10 days
    • Treat all bedding, clothes and towels
  9. How do you treat clothing, bedding and towels for lice?
    • Hot water or 30 minutes
    • Dry-cleaning
    • Dryer for 40 minutes
    • Storage in airtight container for 2 weeks
  10. Why had bedbugs disappeared for so long?
    DDT use
  11. Why are bedbugs returning?
    Reduced DDT use
  12. What do Bed bugs look like?
    • 1/16 to 1/14 in long
    • Brown/purplish red color
  13. What do Bed bug bites look like?
    • Similar to mosquitoes
    • Clusters or rows are common
  14. Are bedbugs easy to kill?
    No, resistant to most insectacides
  15. Where are cracks or crevices that bedbugs live in found?
    Within 8 feet from where a person sleeps
  16. How do you rid of Bedbugs from sheets?
    • Wash as you would with lice
    • Freeze
    • Heat treatment
    • Dry-cleaning
  17. What are chiggers?
    Larvae of mites from small rodents
  18. What do chiggers do to humans?
    Suck fluids from host
  19. What causes chigger bites to itch?
    Injected saliva
  20. How do you prevent chigger bites?
    • Repellents:
    • DEET
    • permethrin
    • sulfur powder
  21. How do you treat chigger bites?
    • ChiggerX:
    • antipruritics
    • antihistamines
  22. What is "tick" a common name for?
    Small arachnids
  23. Where do ticks live in the environment?
    In tall grass
  24. Where do ticks gain nutrients?
    From blood of host
  25. What are the cutting mandibles that allow ticks to attach to hosts?
  26. What is the feeding tube of ticks called?
  27. What type of ticks transmit lime disease to humans?
    Deer ticks
  28. What are the new challenges of parasites?
    • Globalized world
    • untreated communities
    • Lack of strategies
    • Lack of education
  29. What animal is re-infecting populations with parasites in northern Canada?
  30. What are the top three areas for Malaria?
    • 90% Africa
    • 6% SE Asia
    • 2% East Mediterranean
  31. The majority of Malaria deaths are in what group?
    Children under 5
  32. Where are drug resistant strains of Malaria developing?
    Cambodia and Thailand