Gangrene, Cellulitis & Erysipelas

Question 1

How does Cellulitis or Erysipelas occur?

Answer 1

When bacteria penetrate broken skin and causes cutaneous infection

Question 2

MC bacteria causing Cellulitis

Answer 2

• S. aureus
• Group A B-hemolytic Streptococci - S. pyogenes

Question 3

MC bacteria causing Erysipelas.

Answer 3

• Group A B-hemolytic Streptococci - S. pyogenes

Question 4

Cutaneous structures involved in Cellulitis

Answer 4

• Deeper dermis
• Subcutaneous fat

Question 5

Cutaneous structures involved in Erysipelas

Answer 5

• Upper dermis
• Superficial lymphatics

Question 6

CFs of C/E

Answer 6

• Erythema
• Edema
• Warmth

Question 7

MC location of C/E

Answer 7

LE

Question 8

Lesion characteristics in Erysipelas

Answer 8

• Raised
• Clear line of demarcation b/w lesion & skin

Question 9

Clinical course of Erysipelas

Answer 9

• Acute onset

= Systemic symp –> fever & chills

Question 10

Severe infections that should be considered if there is rapid erythema + systemic toxicity.

Answer 10

1. Necrotizing fasciitis
2. Toxic Shock Syndrome
3. Gas gangrene 4

Question 11

Empiric Tx of purulent/ non-purulent Cellulitis

Answer 11

Oral
- Clindamycin
- Amoxicillin + TMP-SMX
- Amoxicillin + Tetracycline

Question 12

Tx of Erysipelas w/o systemic manifestation

Answer 12

Oral
- Penicillin or Amoxicillin

Question 13

Tx of Erysipelas w/ systemic manifestation

Answer 13

IV
- Ceftriaxone or Cefazolin