Bovis ISSN 2398-2993

Hair pluck

Synonym(s): Diagnostics

Contributor(s): Vetstream Ltd , Catherine Fraser

Introduction

  • Hair examination is valuable aid to differential diagnosis of skin and hair disorders.
  • Useful technique - analysis for fungal diseases; parasitic diseases; congenital/hereditary diseases.
  • Differentiate self-trauma from other causes of hair loss/damage.

Uses

Advantages

  • Easy technique.
  • Inexpensive.
  • Alternatives may be expensive, eg biopsy Skin biopsy, fungal culture, and more invasive, eg biopsy.
  • For a definitive diagnosis of dermatophytosis it complements a positive culture as trichography (like biopsy) provides evidence of active infection while false positive cultures are possible due to contamination.
  • A hair pluck may be more readily collected than a scraping from certain patients and certain areas of the body, eg face or feet and may be adequate to diagnose (but not to rule out) demodicosis.

Disadvantages

  • For dermatophytosis - does not provide information about the fungal species involved.
  • Dermatophyte infected hairs may be more readily detected on a scrape from the area with infected hair fragments being picked up.

Requirements

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Preparation

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Procedure

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Outcomes

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Further Reading

Publications

Refereed Papers

Other sources of information

  • Miller W H, Griffin C E & Campbell K L (2013) Muller and Kirk's Small Animal Dermatology. 6th edn. Philadelphia: W B Saunders. pp 81-83.
  • Moriello K A & Mason I S (1995) Handbook of Small Animal Dermatology. 1st edn. Pergamon. pp 23-25.
  • Van Cutsem J & Rochette F (1991) Mycoses in Domestic Animals. Janssen Research Foundation. pp 28-29.
  • Soulsby E J L (1968) Helminths, Arthropods and Protozoa of Domesticated Animals. 6th edn. Balliere Tindall and Cassell. pp 370.


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