Last reviewed: November 2017
Last updated: November  2017

Summary

Definition

History and exam

Key diagnostic factors

  • infants, children, and the elderly
  • hx of overcrowding
  • hx of itching in family members or close contacts over the same period
  • generalised and intense pruritus, typically worse at night
  • burrows
  • papules, vesicles, excoriations
  • positive ink burrow test

Other diagnostic factors

  • papules on face, neck, palms, and soles in children
  • immunosuppression
  • bullae
  • thick, crusted lesions occurring on elbows, knees, hands, and feet with dystrophic nails
  • nodules

Risk factors

  • overcrowded living conditions/poverty
  • living in close quarters with others who are infected
  • age under 15 or over 65 years
  • sexual contact with new or multiple partners
  • immunosuppression
  • poor hygiene
  • contact with an infected animal
  • contact with contaminated clothing, towels, and bedding
  • winter season

Diagnostic investigations

1st investigations to order

  • ectoparasite preparation
Full details

Emerging tests

  • epiluminescence light microscopy
Full details

Treatment algorithm

Contributors

Authors VIEW ALL

Laura Korb Ferris

Assistant Professor

Department of Dermatology

University of Pittsburgh

Pittsburgh

PA

Disclosures

LKF declares that she has no competing interests.

Dermatologist

Dermatology Center of Canyon County

Nampa

ID

Disclosures

RH declares that he has no competing interests.

Dr Laura Korb Ferris and Dr Ryan Harris would like to gratefully acknowledge Dr Pooja Khera, a previous contributor to this monograph. PK declares that she has no competing interests.

Peer reviewers VIEW ALL

Assistant Professor

Department of Pathology and Laboratory Medicine

University of California

Los Angeles

CA

Disclosures

DC declares that he has no competing interests.

Chairman

International Foundation of Dermatology

London

UK

Disclosures

RJH declares that he has no competing interests.

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