Vesicular rash

From IDWiki

Differential Diagnosis

  • Infectious
    • Viral
      • Varicella-zoster virus
      • Enterovirus ("eczema coxackium")
      • Vaccinia (smallpox vaccine-related)
      • Herpes simplex virus
      • Coxsackie virus
      • Molluscum contagiosum
      • Smallpox (variola major)
      • Monkeypox and other pox viruses
    • Bacterial
      • Impetigo
    • Parasitic
      • Scabies
      • Insect bites
  • Non-infectious
    • Stevens-Johnson syndrome
    • Pemphigus
    • Bullous pemphigoid
    • Drug reactions
    • Erythema multiforme
    • Dermatitis herpetiformis

Investigations

  • Molecular
    • Viral PCR of unroofed lesion, likely the best and fastest test for differentiating the viral causes
  • Culture
    • Viral culture