Skin Soft Tissue Infxn

Question 1

What bacteria cause purulent cellulitis?

Answer 1

Staph aureus/MRSA

Question 2

What are rash red flags?

Answer 2

travel, fever, new meds, immunocompromised/old/young

Question 3

How do you treat purulent cellulitis?

Answer 3

SMX/TMP, vancomycin IV, doxycycline, clindamycin

Question 4

What is the etiology in non-purulent cellulitis?

Answer 4

Streptococcus pyogenes

Question 5

What is the tx for non-purulent cellulitis?

Answer 5

dicloxicillin, amoxicillin, nafcillin IV, clindamycin, macrolides, cephalexin, cefazolin IV

Question 6

What is the etiology of erysipelas and what are s/sx’s?

Answer 6

Strep pyogenes. intense erythema on low extremities or face, induration, sharp border, fever, chills, jt/muscle pain, HA, nausea

Question 7

What is the etiology of necrotizing fasciitis?

Answer 7

type I = polymicrobial, includes Vibrio sp, includes Fournier’s gangrene, type II = Group A strep (S pyogenes), Type III = Clostridium sp.

Question 8

What are s/sx’s of necrotizing fasciitis?

Answer 8

intense pain/tenderness, prev trauma, fever, malaise, myalgias, edema, crepitus/cutaneous emphysema, pain progresses to anesthesis, hx DM, erythema, purple discoloration, black spot

Question 9

Tx of necrotizing fasciitis

Answer 9

surgical debridement, pen G + aminoglycoside (Zosyn) + clindamycin + vancomycin

Question 10

What is pemphigous vulgaris?

Answer 10

autoimmune blistering dz, IgG mediated, oral & cutaneous lesions