Impetigo

Question 1

Which bacteria causes impetigo?

Answer 1

Staph aureus or streptococci

Question 2

What is the definition of impetigo?

Answer 2

Common, contagious, superficial skin infection

Question 3

What are they 2 clinical forms of impetigo?

Answer 3

Bullous impetigo
Non bullous impetigo

Question 4

How do both forms of impetigo start?

Answer 4

Both begin as vesicles with a very thin, fragile roof consisting only of stratum corneum (outermost layer of epidermis)

Question 5

Which bacteria typically causes bullous impetigo?

Answer 5

Staph aureus

Question 6

What is the clinical manifestations of impetigo?

Answer 6

Acute purulent infection which appears vesicular, progresses to golden yellow ‘honey crusted’
Lesions surrounded by erythema
Can present with Bullous

Question 7

What are the common sites for impetigo?

Answer 7

Face
Arms
Legs
Buttocks

Question 8

what is the epidemiology of impetigo?

Answer 8

Preschool
Adults living in crowded conditions
Poor hygiene
Neglected minor trauma

Question 9

What is the d/d for impetigo?

Answer 9

Infected eczema
HSV
VZV

Question 10

Which investigations are done for impetigo?

Answer 10

Based on history and clinical appearance
Cultured not routinely performed
Gram stain and culture of lesion fluid or biopsy can be performed

Question 11

What is the management for impetigo?

Answer 11

Remove crusts, use saline compresses and topical antiseptic soaks bid (twice daily)
Topical antibacterial such as 2% mupirocin or fusidic acid tie (three times daily) continue for 7-10 days after resolution
Systemic antibiotics such as cloxacillin or cephalexin for 7-10 days