Ectoparasites

Question 1

Ectoparasite
Sarcoptes scabeii
(transmis/epi)

Answer 1

person-person
fomites
STD
female burrows, lays eggs

Question 2

Ectoparasite
Sarcoptes scabeii
(pathophys)

Answer 2

Type IV hypersens

Question 3

Ectoparasite
Sarcoptes scabeii
(risk factors)

Answer 3

homeless, refugee camps

Question 4

Ectoparasite
Sarcoptes scabeii
(sx)

Answer 4

intense pruritis
(3 wks 1st exposure, 3 days subsequent)
eryth papules/pustules
hands, feets, waist, genitals

Question 5

Ectoparasite
Sarcoptes scabeii
(diagnosis)

Answer 5

skin scrape miscroscopy

burrow ink test

Question 6

Ectoparasite
Sarcoptes scabeii
(treatment)

Answer 6

1)topical permethrin 5%
tx x2, 1 wk apart
tx household, sex partners
2) OR oral ivermectin

Question 7

Ectoparasite
Sarcoptes scabeii
(Norwegian variation)

Answer 7

Kristian brought this over from Norway, sorry
risks: HIV, HTLV
entire dermis
apruritic

Question 8

Ectoparasite
Sarcoptes scabeii
(nodular variation)

Answer 8

genitals, axillae, buttocks, areolae

post-inflammatory hyperpigmentation

Question 9

Ectoparasite
Pediculoses (lice)
transmiss/epi

Answer 9

species specific arthropods
person-to-person, fomites
females lay eggs on follicles
hatch 6 days, adults by 10 days
life cycle: 1-3 mos

Question 10

Ectoparasite
Pediculoses (lice)
subtypes

Answer 10

capitis - head
pubis - pubic
corporis - body (vector for typhus, relapsing fever!)

Question 11

Ectoparasite
Pediculoses (lice)
(pathophys)

Answer 11

hypersensitivity to lice saliva (pruritis!)

Question 12

Ectoparasite
Pediculoses (lice)
(diagnosis)

Answer 12

visualize, fluorescence

Question 13

Ectoparasite
Pediculoses (lice)
(treatment)

Answer 13

gels, lotions, creams, shampoos

Question 14

Ectoparasite
Climex lectularis (bedbugs)
(transmiss/epi)

Answer 14

hide in furniture by day
feed at night
detect CO2 release

Question 15

Ectoparasite
Climex lectularis (bedbugs)
(clinical)

Answer 15

linear bites, pruritis, wheal

Question 16

Ectoparasite
Climex lectularis (bedbugs)
(treatment)

Answer 16

antihistamines
topical corticosteroids
heat/steam clean

Question 17

Ectoparasite
Tunga penetrans (jiggers)
(transmiss/epi)

Answer 17

“sand fleas”
Africa, Latin America, Caribbean
feet, toenails

Question 18

Ectoparasite
Tunga penetrans (jiggers)
(sx and dx)

Answer 18

“tungiasis”
papule with black dot indicating bug butt
pain, intense itching

Question 19

Ectoparasite
Tunga penetrans (jiggers)
(treatment)

Answer 19

extraction with sterile needle/curette

Question 20

Ectoparasite
myiasis (maggots)
(transmiss/epi)

Answer 20

tumbu fly (Africa) - eggs laid on linens
botfly (South Am) - eggs laid on ‘squito
larave burrow and grow. dios mio.

Question 21

Ectoparasite
myiasis (maggots)
(types)

Answer 21

furuncular - subcutaneous
wound - ulcerous
cavitary - intestinal, urogenital

Question 22

Ectoparasite
myiasis (maggots)
(clinical)

Answer 22

bug butt may be visible
serous oozy fluid
pruritis, pain

Question 23

Ectoparasite
myiasis (maggots)
(treatment)

Answer 23

suffocation! (vaseline, pork fat (!), nail polish)