ABD Cutaneous Infectious Diseases 2

Question 1

A 6-year-old presents with honey-colored crusted lesions around the nose and mouth. What is the most likely diagnosis?

Accepted Answer

Non-bullous impetigo

Answer

Ecthyma gangrenosum

Answer

Erysipelas

Answer

Perioral dermatitis

Question 2

Which organism is the most common cause of bullous impetigo?

Accepted Answer

Staphylococcus aureus

Answer

Streptococcus pyogenes

Answer

Pseudomonas aeruginosa

Answer

Corynebacterium minutissimum

Question 3

A diabetic patient develops a rapidly spreading, exquisitely painful erythema with crepitus and dishwater-gray drainage. What is the priority intervention?

Accepted Answer

Urgent surgical debridement

Answer

Topical mupirocin

Answer

Oral cephalexin and observation

Answer

Warm compresses only

Question 4

Erythrasma of the intertriginous areas fluoresces what color under Wood's lamp?

Accepted Answer

Coral-red

Answer

Blue-green

Answer

Yellow-green

Answer

Bright white

Question 5

A febrile patient has a sharply demarcated, raised, warm, erythematous plaque on the face. This presentation is most consistent with:

Accepted Answer

Erysipelas

Answer

Cellulitis

Answer

Contact dermatitis

Answer

Angioedema

Question 6

Which finding is characteristic of staphylococcal scalded skin syndrome (SSSS)?

Accepted Answer

Positive Nikolsky sign with sparing of mucous membranes

Answer

Mucosal involvement with target lesions

Answer

Deep dermal necrosis

Answer

Grouped vesicles on an erythematous base

Question 7

First-line treatment for a small, uncomplicated cutaneous abscess is:

Accepted Answer

Incision and drainage

Answer

Systemic vancomycin

Answer

Topical corticosteroids

Answer

Oral fluconazole