7: Bacterial Skin Infections - Smith Flashcards

1
Q

primary v. secondary skin infections

A

1: normal skin, coagulase-pos stapphylococci, beta-hemolytic strept
2: damaged skin, proteus, pseudomonas, e. coli

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2
Q
  • childhood
  • summer w/ high humidity
  • erythematous vesicle
  • ** honey crusted lesion
  • amber exudate
  • s. aureus, group a strep, s. pyogenes
A

impetigo contagiosa - superficial

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3
Q

tx impetigo contagiosa supeficial

A
  • beta lactamase resistant antibiotics [ erythromycin, oxacillin, dicloxacillin]
  • topical antibiotic ointment [ neosporin, mupirocin]
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4
Q
  • bullae less than 3 cm in diameter

- amber liquid or white/yellow pus fluid

A

impetigo contagiosa bullous

- less common than superficial, same treatment

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5
Q
  • develop shallow erosions through epidermis on lower extremity
  • similar to superficial impetigo or ecythma gangrenosum (pseudomonas septicemia)
A

ecthyma

  • caused by strep usually
  • same tx as impetigo
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6
Q

term for infection of skin and subcutaneous tissue

A

cellulitis

  • group A sterp, s. aureus, pseudomonas
  • portal of entry
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7
Q

tx cellulitis

A

penicillinase-resistant penicillin or cephalosporin

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8
Q

“st. anthony’s fire”

A

erysipelas

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9
Q

tx erysipelas

A
  • bed rest with elevation of extremity
  • IV cephalosporins
  • cool wet dressing
  • unna boot
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10
Q

localized subcutaneous or dermal accumulation of purulent material

A

cutaneous abscess

  • usually starts as folliculitis
  • staph or strep
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11
Q

organism folliculitis

A

coagulase positive staphylococci

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12
Q

“hot tub dermatitis”

A

pseudomonal folliculitis

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13
Q

acute staphylococcal infection of the hair follicle with more inflammation and spread of cellulitis

A

furunculosis

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14
Q

infection of the toenail folds and surrounding structures

A

paronychia

- tx with removal of ail spicule (incision and drainage)

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15
Q

small rapidly growing pink and red vascular tumors that arise after minor trauma or with ingrown nails

A

pyogenic granuloma

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16
Q

tx pyogenic granuloma

A
  • debridement with curettage of base

- cauterize lesion

17
Q

superficial infection that occurs as an asymptomatic eruption on the weight-bearing surface of the sole

  • small circular punched out pits in stratum croneum
  • ** hyperhidrosis
A

pitted keratolysis

- caused by corynebacterium and micrococcus

18
Q

bacterial infection of toe web space

A

interdigital erythrasma

*** corynebacterium minutissimum

19
Q

fluoresces coral red with woods light ***

A

interdigital erythrasma