Parasitic Skin Infections Flashcards Preview

Dermatology - Clinical Medicine IV > Parasitic Skin Infections > Flashcards

Flashcards in Parasitic Skin Infections Deck (60)
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1

What are parasitic dermatoses?

pediculosis and scabies

2

What causes pediculosis?

ectoparasites that live on body

3

What is the common term for pediculosis?

lice

4

What causes the pruritis with lice?

pierce skin and inject saliva

5

Are lice able to survive away from human host?

yes

6

How long does it take for lice to die of starvation?

10 days away from host

7

How many eggs does a female louse lay each day?

3-6, white 1mm long

8

How long does it take a nit to latch and mature?

8-10 days hatch, 12-15 mature, live for 10 days

9

What lice infest head?

Pediculosis capitis

10

What lice infest body?

Pediculosis corporis

11

What lice infect pubic area?

Pediculosis pubis or Pthirus pubis

12

What is the most common manifestation of pediculosis?

pruritis

13

Where does p corporis cause itching?

axilla, truncal and groin

14

What are associated features of pediculosis?

papules, wheals, bit reaction, excoriation

15

What is pathognomic for infestation of life?

maculae cerulea

16

How do maculae cerulea?

blue-gray macules, enzyme in saliva break down human bilirubin

17

How long does head lice survive away from human?

1-2 days

18

What are the effected areas in pediculosis capitus?

scalp, neck, postauricular

19

How do you get head lice?

combs, brushes, hats, scarves, bedding

20

How do you dislodge lice?

sweater removal, hair combing

21

How far can head lice travel?

23 cm/min

22

What are symptoms of p. capitis?

scalp pruritius, occipital lymphadenopathy, impetigo

23

Where is heaviest infection for p. capitis?

retroauricular scalp

24

Where do p. corporis lay their eggs?

clothing fibers

25

How long can p. corporis survive?

10 days

26

What has p humanus corporis?

typhus, trench fever, relapsing fever

27

What do you see with p. corporis?

multiple lesions from bites present, uninfected are papules 2-4 mm, located anywhere

28

What are eyelash nits a manifestation?

pubic louse infestation

29

What lice species is less mobile?

p. pubis

30

How long can p pubis survive off human?

1 day