Dermatology Book

http://www.fpnotebook.com/

Tinea Barbae

Advertisement

  1. Epidemiology
    1. Adult males
    2. Seen now in farmers related to animal exposure
  2. Etiology
    1. Trichophyton verrucosum
    2. Trichophyton mentagrophytes
  3. Pathophysiology
    1. Dermatophyte infection of the beard and mustache area
    2. Trichomycosis (Invasion of Hair Shaft)
      1. Resembles Tinea Capitis infection
  4. Symptoms
    1. Pruritus
    2. Local tenderness
  5. Signs
    1. Distribution
      1. Beard and mustache area
      2. Eyelashes and eyebrows (rare)
    2. Pustular Folliculitis
      1. Hair Follicles surrounded by inflammation
        1. Papules and Pustules
        2. Superimposed exudate and crust
      2. Hair easily removed
    3. Circular reddish patches with scale
      1. Hairs broken off at surface
  6. Differential Diagnosis
    1. Bacterial Folliculitis (Staphylococcus aureus)
    2. Furuncle or Carbuncle
    3. Acne Vulgaris
    4. Rosacea
    5. Perioral dermatitis
    6. Pseudofolliculitis barbae
    7. Contact Dermatitis
    8. Herpes Simplex Virus (Eczema herpeticum)
  7. Labs: Potassium Hydroxide (KOH) of plucked hair
    1. Hyphae seen invading Hair Shaft
  8. Management: Systemic Antifungal Medications
    1. Treat for 2-3 weeks after lesion resolution
    2. Griseofulvin 500 mg PO bid for 4-6 weeks
    3. Ketoconazole 200 mg PO qd for 4-6 weeks
  9. Complications
    1. Staphylococcus aureus superinfection
    2. Kerion
  10. Reference
    1. Fitzpatrick (1992) Color Atlas Dermatology
    2. Hainer (2003) Am Fam Physician 67(1):101

Navigation Tree