PAMS: dermatology: Bacterial infections of the skin

Question 1

What is the cause of non-bullous impetigo ?

Answer 1

Streptococcal aureus and GAS-beta hemolytic.

Question 2

What is the cause of Bullous impetigo?

Answer 2

Exfoliative toxins A and B of Strep. Aureus. It is commonly seen on the skin folds of trunk.

Question 3

What is ecthyma ?

Answer 3

Infection extends deeper into the
dermis. Ulcerative form with hemorrhagic crust, most common distal extremities Often heals with scarring.

Question 4

What are the first and second line topical antibiotic choices in impetigo ?

Answer 4

First line: Fusidic Acid 2%
second line: Mupirocin 2% (covers MRSA)

Question 5

What are the two skin bacterial infections associated with systemic involvement ?

Answer 5

cellultis and erysypilas ( acute onset).

Question 6

What is the cause of edema in erysipelas ?

Answer 6

involvement of the superficial lymphatics. the most common causes are group A strep and H. influence.

Question 7

What is the organism in Facial & Periorbital Cellulitis?

Answer 7

Haemophilus influenzae

Question 8

Cellulitis 2nd Dog & Cat Bites caused by

Answer 8

Pasteurella multocida

Question 9

Cellulitis in IVDA is caused by ?

Answer 9

S. aureus

Question 10

Crepitant Cellulitis is caused by

Answer 10

Clostridia species

Question 11

Cellulitis due to Penetrating Trauma, Immunocompromised
& Hospitalized is caused by ?

Answer 11

Pseudomonas aeruginosa