Skin infections

Question 1

Risk factor for perioral dermatitis

Answer 1

Steroid creams

Question 2

First-line management for perioral dermatitis

Answer 2

Oral/ topical antibiotic

- i.e. metronidazole gel

Question 3

First line management for class 1-2 cellulitis

Answer 3

Oral flucloaxcillin 500mg QDS

alternatives (pen allergy)= clarithromycin/ erythromycin

Question 4

First line management for class 3-4 cellulitis

Answer 4

IV antibiotics

• Co-amoxiclav
• clindamycin
• Ceftriaxone

Question 5

Indications for surgical intervention in cellulitis

Answer 5

Circumferential cellulitis

Crepitus

Necrosis

Question 6

Risk factors for cellulitis

Answer 6

Venous insufficiency/ Lyphoedema

Immunosuppression

Older age

IVD misuse

Question 7

Types of impetigo

Answer 7

Non-bullous

Bollous

Question 8

Most probable causative agent for impetigo is…

Answer 8

S. aureus

Question 9

First line management for systemically well, non-bollous impetigo

Answer 9

Topic hydrogen peroxide cream/ fusidic acid

Question 10

MRSA impetigo is treated with…

Answer 10

Topical mupirocin

Question 11

Extensive disease/ bullous impetigo is treated with…

Answer 11

Oral flucloxacillin

Question 12

Kids with impetigo have to miss school until…

Answer 12

Lesions have crusted over/ 48 hours after starting antibiotics

Question 13

First-line management for eczema herpeticum is…

Answer 13

Oral aciclovir/ IV (in children)

Question 14

Scabies is caused by ________

Answer 14

Sarcoptes scabiei (mites)

Question 15

Crusted scabies describes…

Answer 15

Severe scabies with hundreds of mites

- Occurs in immunocompromised

Question 16

Features of scabies

Answer 16

Extremely pruritic papular rash

Excoriations

Track marks from scabies burrowing

Location: between fingers, wrist flexors

Question 17

First-line management of scabies

Answer 17

Topical permithrin 5% cream

- Applied all over body

Question 18

Administration instructions for applying topical permithrin cream for scabies

Answer 18

Apply to every area of the body
- Apply on cool skin (not wet)

Leave for 8-12 hours before washing

Repeat application in a week

Question 19

Second-line treatment for scabies

Answer 19

Oral ivermectin

Question 20

Crusted scabies is treated with…

Answer 20

Oral ivermectin

Question 21

Headlice is caused by infestations of…

Answer 21

Pediculus humanus capitis

Question 22

_______ lotion is indicated for headlice

Answer 22

Dimeticone 4%

Question 23

Administration instructions for applying topical dimeticone cream for headlice

Answer 23

Leave to dry for 8 hours before washing

Repeat in 7 days

Only symptomatic close contacts are treated

Question 24

Most common cause of tinea capitis is…

Answer 24

Trichophyton fungus

Question 25

______ describes a tinea infection of the nail

Answer 25

Onchychomycosis

Question 26

General advice for managing tinea

Answer 26

Wearing loose clothes

Now sharing bedding/ clothes/ towels

Not using same towel for feet and rest of body (pedis)

Not scratching and spreading to other areas

Clean socks everyday

Question 27

First line therapy for mild, non-extensive tinea capitis/ corporis

Answer 27

1. Topical antifungal
   - Terbinafine
   - Clomitrazole

Ketoconazole shampoo

Question 28

First line therapy for severe, extensive tinea capitis/ corporis

Answer 28

Oral terbinafine

Question 29

First line therapy for onchymycosis

Answer 29

Amorolfine nail lacquer
- 1-2x weekly

for 6-12 months

Question 30

Therapy for resistant/ severe onychomycosis

Answer 30

Oral terbinafine