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MIC 541-Exam 5-Parisitology 14
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What are the common pathologies of arthropod infections?
Itching
Scabs
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
Dry-cleaning
Dryer for 40 minutes
Storage in airtight container for 2 weeks
Why had bedbugs disappeared for so long?
DDT use
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
Freeze
Heat treatment
Dry-cleaning
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?
Injected saliva
How do you prevent chigger bites?
Repellents:
DEET
permethrin
sulfur powder
How do you treat chigger bites?
ChiggerX:
antipruritics
antihistamines
What is "tick" a common name for?
Small arachnids
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?
chelcerae
What is the feeding tube of ticks called?
Hypostome
What type of ticks transmit lime disease to humans?
Deer ticks
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?
Dogs
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
Author
kyleannkelsey
ID
218369
Card Set
MIC 541-Exam 5-Parisitology 14
Description
MIC 541-Exam 5-Parisitology 14
Updated
5/7/2013, 9:14:17 PM
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