Bacterial Infections: EPIDERMIS

Question 1

IMPETIGO Clinical Feature lesion

Answer 1

• acute purulent infection which appears vesicular; progresses to golden yellow “honey-crusted” lesions
surrounded by erythema
• can present with bullae

Question 2

IMPETIGO common sites:

Answer 2

face, arms, legs, and buttocks

Question 3

IMPETIGO Etiology

Answer 3

GAS, S. aureus, or both

Question 4

IMPETIGO Epidemiology

Answer 4

preschool and young adults living in crowded conditions, poor hygiene, neglected minor trauma

Question 5

IMPETIGO Differential Diagnosis

Answer 5

infected eczema, HSV, VZV

Question 6

IMPETIGO Investigations

Answer 6

Gram stain and culture of lesion uid or biopsy

Question 7

IMPETIGO Management

Answer 7

remove crusts, use saline compresses, and topical antiseptic soaks bid
• topical antibacterials (e.g. 2% mupirocin or fusidic acid (Canada only) tid; continue for 7-10 d aer
resolution)
• systemic antibiotics (e.g. cloxacillin or cephalexin for 7-10 d)