Updated: 9/9/2017

Scabies / Itch Mite

Topic
Review Topic
0
0
Snapshot
  • A 2-year-old girl is brought in by her parents due to a rash on her armpit and belly for 2 weeks. Her major complaint is itching. The lesions are so itchy that she cannot sleep at night and scratches her rashes constantly. She goes to daycare 3 days a week. Skin exam reveals multiple polymorphous scaly papules on her hands, in the axilla, and around the umbilicus. A skin scraping with mineral oil prep reveals mites under microscopy.
Introduction
  • Superficial skin infection caused by arthropod Sarcoptes scabiei (mite)
  • Severe itching at night
  • Too small to be seen by naked eye
  • Pathognomonic sign
    • burrows, linear markings in skin due to mites’ movements
  • Risk factors
    • close contacts with scabies
Presentation
  • Symptoms
    • hallmark feature
      • itching worse at night
  • Physical exam
    • adults
      • burrows, especially in between finger web spaces
      • linear markings in skin with some scale
      • erythematous, inflamed pustules and papules
      • commonly on wrist, finger webs, axillae, chest, umbilicus, genital area
    • children
      • generalized pruritic rash
      • scalp may also be involved
Evaluation
  • Diagnosis based on clinical exam and history
  • Diagnosis confirmed with simple office procedure
    • skin scraping with mineral oil prep
      • can see mites under microscopy
Differential Diagnosis
  • Chiggers
  • Bedbugs
  • Contact dermatitis
Treatment
  • Topical permethrin
  • Sterilize laundry
    • wash/dry all clothing with high heat or throw away
Prognosis, Prevention, and Complications
  • Prognosis
    • very good
  • Prevention
    • avoid those with known scabies
    • treat all known contacts
 

Please rate topic.

Average 5.0 of 1 Ratings

Thank you for rating! Please vote below and help us build the most advanced adaptive learning platform in medicine

The complexity of this topic is appropriate for?
How important is this topic for board examinations?
How important is this topic for clinical practice?
Topic COMMENTS (2)
Private Note