Infestations and Bites Flashcards
Pediculosis is another name for _________
lice (louse or crabs)
What causes the itching from pediculosis?
allergic reaction to louse saliva
What are the three types of lice species?
How do you make a diagnosis of head or public lice?
You need viable eggs (nits) or at least a single live louse
empty nits are NOT enough
where do eggs typically attach?
close to the scalp
*in warmer climates, may not be true
What must an adult louse do before copulating?
take a blood meal
how do most louse treatments work?
toxic to louse nervous system
developing embryos may survive initial treatment, so need a second course 7-10 days later to kill newly hatched nymphs
What is the first-choice treatment for lice?
Nix - permethrin 1%
What’s a choice for treatment of lice in a pregnant or lactating woman?
benzyl alcohol - 5%
*suffocates lice
What are key components of environmental measures for lice?
What other diseases can body lice transmit?
typhus and trench fever
what is the causative organism of scabies?
The mite Sarcoptes scabiei
scabies lesions are usually __________ on each side of the body
symmetric
where are scabies burrows typically found?
hands
feet
genitals
buttocks
waistline
armpits
(typically NOT head and neck except kids and immunocomp.)
what is Norweigan scabies?
crusted scabies that usually does not have intense pruritis and there may be nail, hand, scalp involvement
extremely contagious and can be 1k mites at a time on a person
found on older, immunocompromised, homeless individuals
