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Uncovering common bacterial skin infections

doi: 10.1097/01.NPR.0000427943.78136.31
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INSTRUCTIONS Uncovering common bacterial skin infections


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Uncovering common bacterial skin infections

General Purpose: To provide information on the evaluation of common bacterial skin infections. Learning Objectives: After reading the article and taking this test, the NP should be able to: 1. Discuss the etiology, diagnosis, and prevention of four common bacterial skin infections. 2. Identify the clinical presentation and treatment of impetigo, erysipelas, cellulitis, and folliculitis.

  1. Which statement is true regarding bacterial skin infections?
    1. One of the most common causative organisms is Klebsiella.
    2. Signs and symptoms of gout can mimic those of a skin infection.
    3. Patients with diabetes are more prone to infections by gram-positive organisms.
    4. From 2000 to 2004, the rate of hospitalizations for skin infections increased 43%.
  2. Which organism commonly found in the gastrointestinal system causes impetigo?
    1. Streptococcus pyogenes
    2. Staphylococcus aureus
    3. Enterobacter aerogenes
    4. Klebsiella pneumoniae
  3. People particularly susceptible to impetigo include those who
    1. are over 40 years old.
    2. live in a cold, dry climate.
    3. live in overcrowded conditions.
    4. have had surgery that disrupts lymphatic drainage.
  4. Which statement is true regarding impetigo?
    1. Bullous impetigo causes significant mortality in infants.
    2. Nonbullous impetigo is less common than bullous impetigo.
    3. Bullous impetigo presents as small vesicles with honey-colored crust.
    4. Nonbullous impetigo presents with blisters containing serous fluid.
  5. A common site for impetigo is
    1. the scalp.
    2. under the nose.
    3. the back of the neck.
    4. the trunk.
  6. Which treatment for impetigo can help prevent the development of MRSA?
    1. bacitracin
    2. erythromycin
    3. neomycin
    4. mupirocin
  7. Erysipelas affects the
    1. epidermis only.
    2. superficial lymphatics.
    3. pilosebaceous follicles.
    4. subcutaneous fat.
  8. Skin findings in erysipelas include
    1. pruritus.
    2. pustules and papules.
    3. peau d'orange appearance.
    4. partially denuded areas.
  9. Erysipelas is differentiated from cellulitis by its
    1. less-defined margins.
    2. fluid-filled bullae.
    3. tissue necrosis.
    4. raised border.
  10. Risk factors for erysipelas include all of the following except
    1. lymphedema.
    2. leg ulcers.
    3. cachexia.
    4. prior leg surgery.
  11. Prevention of erysipelas includes
    1. not sharing toiletry items.
    2. scrubbing the skin with abrasives.
    3. cleansing all injuries with vinegar in warm water.
    4. avoiding tight-fitting clothing.
  12. The author recommends treating severe MRSA-positive erysipelas infections with
    1. isotretinoin.
    2. cephalexin.
    3. penicillin.
    4. linezolid.
  13. Outpatient treatment of cellulitis should include antibiotic coverage for which organism?
    1. pyogenes
    2. aeruginosa
    3. pneumoniae
    4. Proteus vulgaris
  14. Diagnosis of early cellulitis is based on
    1. blood cultures.
    2. a punch biopsy.
    3. a wound culture.
    4. a history and physical assessment.
  15. Which statement is true regarding the treatment of cellulitis?
    1. Nonsteroidal anti-inflammatory drugs should be avoided.
    2. Orbital cellulitis is treated with the application of cool packs.
    3. Patients with diabetes may need systemic corticosteroids.
    4. Fluoroquinolones are safe to use in pregnancy for early cellulitis.
  16. Folliculitis resulting from poorly chlorinated hot tubs is commonly caused by
    1. vulgaris.
    2. pyogenes.
    3. aeruginosa.
    4. aureus.
  17. Signs and symptoms of folliculitis include
    1. nonblanchable skin.
    2. pustules on the palms and soles.
    3. areas of honey-colored crusts.
    4. intense itching.
  18. Prevention of folliculitis includes
    1. wearing long-sleeved shirts in sports practice.
    2. wearing tight-fitting clothing.
    3. shaving in the direction opposite to hair growth.
    4. cleaning clothing every other day.


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