Bacterial Skin Infections

Question 1

what is an erythematous plaque that is tender to palpation with lymphatic streaking. also presents with elevated white count

Answer 1

• cellulitis

Question 2

cellulitis is often found where on the body

Answer 2

• lower leg

Question 3

streaks of lymphangitis in cellulitis may spread from the area to the _______

Answer 3

• draining lymph nodes

Question 4

risk factors for cellulitis

Answer 4

• local trauma - inflammation - edema - systemic infection

Question 5

what organism is most commonly responsible for cellulitis

Answer 5

• group A strep - staph aureus

Question 6

treatment for cellulitis

Answer 6

• cephalosporin (covers GAS and S. aureus)

Question 7

what is a superficial cellulitis with marked dermal lymphatic involvement causing marked edema

Answer 7

• erysipelas

Question 8

main pathogen in erysipelas

Answer 8

• group A strep

Question 9

where does erysipelas usually effect

Answer 9

• lower extremities - face

Question 10

what presents with pain, superficial erythema, and plaque-like edema with a sharply defined margin to normal tissue. and an elevated white count

Answer 10

• erysipelas

Question 11

treatment for erysipelas

Answer 11

• oral antibiotics to cover strep

Question 12

what are erythematous warm, fluctuant nodules with several small pustules that are tender to palpation, and may drain spontaneously. often associated with IV drug use

Answer 12

• abscess

Question 13

treatment of abscess

Answer 13

• incision and drainage - antibiotics in patients with multiple lesions

Question 14

what is an acute, young, tender, circumscribed, perifollicular abscess that generally ends in central suppuration

Answer 14

• furuncle (boil)

Question 15

what is a coalescence of several inflamed follicles into a single inflammatory mass with purulent drainage from multiple follices

Answer 15

• carbunculosis

Question 16

furuncles and carbuncles are a subtype of ______

Answer 16

• abscess

Question 17

where do furuncles and carbuncles preferentially occur

Answer 17

• skin areas containing hair follicles exposed to friction and perspiration

Question 18

organisms that causes furuncles and carbuncles

Answer 18

• s. aureus

Question 19

treatment of furuncles and carbuncles

Answer 19

• oral antibiotics

Question 20

treatment for small furuncle

Answer 20

• warm compress to promote drainage.

Question 21

what presents as multiple follicular pustules with surrounding erythema in the groin usually

Answer 21

• folliculitis

Question 22

can genital folliculitis be sexually transmitted

Answer 22

• yes

Question 23

majority of folliculitis pathogens are

Answer 23

• S. aureus

Question 24

treatment of folliculitis

Answer 24

• antibacterial soap - avoid shaving - oral/topical anti-staph agents

Question 25

what are peri-oral papules and plaques with overlying honey-colored crust

Answer 25

• impetigo

Question 26

is impetigo contagious

Answer 26

• yes

Question 27

organism that causes impetigo

Answer 27

• S. aureus - S. pyogenes

Question 28

big characteristic of impetigo

Answer 28

• honey colored crust

Question 29

bullous impetigo is caused by what

Answer 29

• staph exotoxin

Question 30

what is a focus of infection that secretes toxin into the blood and leads to widespread superficial blisters where skin peels away in sheets

Answer 30

• staphyloccal scalded skin syndrome

Question 31

who is at risk for scalded skin syndrome

Answer 31

• kids < 2 years of age - adults with renal disease

Question 32

treatment of impetigo

Answer 32

• mupirocin ointment - cephalosporins, clindamycin

Question 33

expanding rash that is ill-defined, with central patches of dusky blue discoloration is what

Answer 33

• necrotizing fasciitis

Question 34

if you suspect necrotizing fasciitis, what do you do?

Answer 34

• consult surgery immediately

Question 35

treatment for necrotizing fasciitis

Answer 35

• debridement - broad-spectrum systemic antibiotics