Bacterial Infections

Question 1

What is Impetigo? What’s it characterized by?
Who is m/c affected?
Where is it m/c located?

Answer 1

• Superficial bacterial infection characterized by “Honey-Colored crusts”
• M/C in young
• M/C on face, nose, mouth

Question 2

What’s the m/c/c of Impetigo?
What’re common sx?

Answer 2

• Staph aureus
• Burning, itching, spreads quickly

Question 3

T/F: Impetigo is contagious.

Answer 3

True

Question 4

How is Impetigo diagnosed?

Answer 4

Bacterial cx

Question 5

How do you treat Impetigo?

Answer 5

• Topical or systemic/oral abx (preferred oral = Dicloxacillin)
• Abx soaps

For localized, uncomplicated or non-bullous, topical therapy alone = TOC

Question 6

What is Erysipelas?
What’s it caused by?
Where is it commonly found?

Answer 6

• Acute streptococcal infection caused by Group A beta hemolytic strep
• Superficial form of cellulitis
• M/C on face & lower extremities

Question 7

Erysipelas is often preceded by?
What’s it associated with?

Answer 7

• Recent trauma or pharyngitis (prodrome)
• Associated with GN, endocarditis, & lymphedema

Question 8

S&S of Erysipelas?

Answer 8

• FIERY red, indurated, tense, shiny plaque with raised sharply demarcated advancing margins!!
• Burning
• Itching
• Super tender
• Warm
• Edema

Question 9

How do you treat Erysipelas?

Answer 9

Drug of choice = Penicillin (if allergic, Macrolides)

Question 10

Cellulitis is more _________ while Stasis Dermatitis is more __________.

Answer 10

• Unilateral
• Bilateral

Question 11

What is Cellulitis?
What’s the m/c/c?
Where is it commonly found?

Answer 11

• A deep infection of the skin
• M/C/C = Group A Strep (also Staph aureus)
• Common on lower legs

Question 12

What’re clinical features of Cellulitis?

Answer 12

• Rubor (red) –> diffuse inflammation of the dermis & SQ tissue
• Warm
• Pain
• Swelling

Question 13

How do you treat Cellulitis?

Answer 13

MUST COVER STAPH & STREP

Uncomplicated - Dicloxacillin, Cephalexin, Clinda

MRSA (+) - Bactrim, Minocycline, Doxy

Severe - Nafcillin for MSSA, Vanco for MRSA

Question 14

What’s the m/c/c of Bacterial Folliculitis?
What’re major sites of involvement?

Answer 14

• Staph aureus
• Scalp, Buttocks/Thighs, Chest/Back, Face/Beard

Question 15

What does Bacterial Folliculitis look like?

Answer 15

Discrete papules/pustules surrounding hair follicle

Question 16

A Furuncle is also known as?

Answer 16

Boil (deep folliculitis, painful circumscribed perifollicular abscess)

Question 17

How do you treat a Furuncle?

Answer 17

• I&D
• Oral abx
• Warm soaks

Question 18

What’s a more severe version of a Furuncle?

Answer 18

A Carbuncle! (cluster of boils that’re very painful)

Question 19

“Hot Tub Folliculitis”

Answer 19

Pseudomonas Folliculitis

Question 20

What does the Pseudomonas Folliculitis rash look like?
When do you usu. see it?

Answer 20

• Pruritic, erythematous macules that progress to papules/pustules
• 8-48 hrs after exposure to contaminated water

Question 21

How do you treat Pseudomonas Folliculitis?

Answer 21

• P. aeuriginosa is usu. a self-limited infection, clearing in 2-10 days