Y5 - Cutaneous parasitic infection (incl. scabies, lice)

Question 1

def of scabies

Answer 1

infestation of ectoparasite sarcoptes scabiei into the stratum corneum

Question 2

how is scabies spread

Answer 2

direct contact with another individual with scabies

Question 3

what are common clues in scabies diagnosis

Answer 3

intense pruritis and linear erythematous burrows at extremities
and erythematous papules in the axilla or genital area

Question 4

epi of scabies

Answer 4

v common

children and elderly

Question 5

when is scabies most common

Answer 5

winter

-due to increased crowding and prolonged survival of mites

Question 6

what ectoparisite causes scabies

Answer 6

sarcoptes scabiei variety hominis

Question 7

aetiology of scabies

Answer 7

parasite burrows into the stratum corneum following skin to skin contact, or transmission via shared clothing

Question 8

is scabies contagious

Answer 8

highly contagious

Question 9

signs and symptoms of scabies

Answer 9

in infants/children/elderly
Hx of overcrowding, itching in family members
itching which is worse at night
burrows
-wavy thread like whitish grey lines on the skin surface

Question 10

what test is used for scabies

Answer 10

ink burrow test

-ink is wiped away and reveals a linear burrow

Question 11

investigations of scabies

Answer 11

ectoparasite preparation

-presence of mites, eggs, faecal material

Question 12

management of scabies non-pregnant/non-lactating adults or children

Answer 12

permethrin/ivermectin

Question 13

management of children <5yrs and pregnant or lactating females

Answer 13

permethrin

Question 14

management for babies <2months

Answer 14

sulfur 6% in pretroleum

Question 15

complications of scabies

Answer 15

post-scabetic pruritis
-occurs as a reaction to mites, eggs, or faeces even after treatment
secondary infection
-strep/staph

Question 16

prognosis of scabies

Answer 16

good

usually cured after two treatments (permethrin or ivermectin

Question 17

what is head lice also known as

Answer 17

pediculosis capitis

Question 18

what is the head louse called

Answer 18

pediculus humanus capitis

Question 19

epi of head lice

Answer 19

common in children

Question 20

aetiology

Answer 20

spread by direct head to head contact

Question 21

what do nits refer to

Answer 21

empty egg casings of lice

Question 22

what causes the itching in lice

Answer 22

they inject small amounts of saliva into the scalp to take blood to feed on
allergic reaction to the saliva causes itching

Question 23

signs and symptoms of lice

Answer 23

RFs (children, overcrowding)
itchy scalp
finding live adult louse or eggs

Question 24

is it more common in males or females (louse)

Answer 24

females - longer hair

Question 25

investigations

Answer 25

clinical diagnosis

Question 26

management for children <2 months

Answer 26

mechanical removal

Question 27

management for children >2months and adults

Answer 27

pediculicide
-dimeticone topical
-permethrin topical
and treat close contacts

Question 28

complications

Answer 28

itching of scalp causing sleep disturbance

impetigo rarely

Question 29

prognosis

Answer 29

2-4 cycles is required to kill all hatching nymphs

good prognosis