Sarcoptic Mange

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Transmission

Puppy with sarcoptic mange - Wikimedia Commons
  • Close contact
  • Adults and larvae can be transferred from one skin surface to another


Pathogenesis

  • Erythema with papule formation
  • Scale and crust formation
    • Alopecia
  • Intense pruritus for 1 week
    • Self-inflicted trauma
    • Scab formation
  • Wrinkling and thickening of skin


Sarcoptes scabiei

  • Strains of S. scabiei can be passed between different animals and cause clinical signs although the infection is likely to resolve spontaneously and be unlikely to establish


Diagnosis

  • Skin scraping until capillary blood appears
    • Adults, eggs, immature mites and faecal pellets can be seen microscopically
  • Place material on a microscope slide
  • Add 10% KOH
  • Warm slide over bunsen flame


Treatment

  • Acaricide
    • For more information on acaricides click here
  • Treat both infected and in-contact animals
  • Older products have to be given in repeat treatments
  • Avermectins are effective in farm animals
  • Selamectin is available as a good spot-on for dogs


In Dogs

In Cats

In Pigs

In Cattle


Sheep

  • Notifiable in UK
  • Lesions on hairy parts of face
    • E.g. Face, ears, axillae and groin
  • Causes considerable hide damage in local African breeds of long haired sheep


Horses

  • Notifiable in UK
  • Lesions begin on head, neck and shoulders then spread to rest of body