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The flashcards below were created by user
kyleannkelsey
on FreezingBlue Flashcards.
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What are the common pathologies of arthropod infections?
- Itching
- Scabs
- Rashes and redness
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Describe the morphology of Head body and pubic lice:
- 6 legs
- Visible to the naked eye
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Where does the lifecycle of Lice occur?
Whole life on human host
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Where do lice gain nutrients?
Blood of host
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Describe the lifecycle of lice:
- White eggs laid by females in the hair
- Hatch into nymphs in 10 days
- Become adults in 14 days
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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
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How are lice transmitted?
Direct contact or fomites
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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
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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
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Why had bedbugs disappeared for so long?
DDT use
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Why are bedbugs returning?
Reduced DDT use
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What do Bed bugs look like?
- 1/16 to 1/14 in long
- Brown/purplish red color
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What do Bed bug bites look like?
- Similar to mosquitoes
- Clusters or rows are common
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Are bedbugs easy to kill?
No, resistant to most insectacides
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Where are cracks or crevices that bedbugs live in found?
Within 8 feet from where a person sleeps
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How do you rid of Bedbugs from sheets?
- Wash as you would with lice
- Freeze
- Heat treatment
- Dry-cleaning
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What are chiggers?
Larvae of mites from small rodents
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What do chiggers do to humans?
Suck fluids from host
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What causes chigger bites to itch?
Injected saliva
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How do you prevent chigger bites?
- Repellents:
- DEET
- permethrin
- sulfur powder
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How do you treat chigger bites?
- ChiggerX:
- antipruritics
- antihistamines
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What is "tick" a common name for?
Small arachnids
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Where do ticks live in the environment?
In tall grass
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Where do ticks gain nutrients?
From blood of host
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What are the cutting mandibles that allow ticks to attach to hosts?
chelcerae
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What is the feeding tube of ticks called?
Hypostome
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What type of ticks transmit lime disease to humans?
Deer ticks
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What are the new challenges of parasites?
- Globalized world
- untreated communities
- Lack of strategies
- Lack of education
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What animal is re-infecting populations with parasites in northern Canada?
Dogs
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What are the top three areas for Malaria?
- 90% Africa
- 6% SE Asia
- 2% East Mediterranean
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The majority of Malaria deaths are in what group?
Children under 5
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Where are drug resistant strains of Malaria developing?
Cambodia and Thailand
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