MIC 541-Exam 5-Parisitology 14
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What are the common pathologies of arthropod infections?
- Rashes and redness
Describe the morphology of Head body and pubic lice:
- 6 legs
- Visible to the naked eye
Where does the lifecycle of Lice occur?
Whole life on human host
Where do lice gain nutrients?
Blood of host
Describe the lifecycle of lice:
- White eggs laid by females in the hair
- Hatch into nymphs in 10 days
- Become adults in 14 days
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
How are lice transmitted?
Direct contact or fomites
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
How do you treat clothing, bedding and towels for lice?
- Hot water or 30 minutes
- Dryer for 40 minutes
- Storage in airtight container for 2 weeks
Why had bedbugs disappeared for so long?
Why are bedbugs returning?
Reduced DDT use
What do Bed bugs look like?
- 1/16 to 1/14 in long
- Brown/purplish red color
What do Bed bug bites look like?
- Similar to mosquitoes
- Clusters or rows are common
Are bedbugs easy to kill?
No, resistant to most insectacides
Where are cracks or crevices that bedbugs live in found?
Within 8 feet from where a person sleeps
How do you rid of Bedbugs from sheets?
- Wash as you would with lice
- Heat treatment
What are chiggers?
Larvae of mites from small rodents
What do chiggers do to humans?
Suck fluids from host
What causes chigger bites to itch?
How do you prevent chigger bites?
- sulfur powder
How do you treat chigger bites?
What is "tick" a common name for?
Where do ticks live in the environment?
In tall grass
Where do ticks gain nutrients?
From blood of host
What are the cutting mandibles that allow ticks to attach to hosts?
What is the feeding tube of ticks called?
What type of ticks transmit lime disease to humans?
What are the new challenges of parasites?
- Globalized world
- untreated communities
- Lack of strategies
- Lack of education
What animal is re-infecting populations with parasites in northern Canada?
What are the top three areas for Malaria?
- 90% Africa
- 6% SE Asia
- 2% East Mediterranean
The majority of Malaria deaths are in what group?
Children under 5
Where are drug resistant strains of Malaria developing?
Cambodia and Thailand
What would you like to do?
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