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External Parasites, Mites: arachnids (Burrowing: Demodex spp. (demodicosis…

- - - - alopecia
      - thickening of skin
      - pustules
      - not pruritic
- - - - highly contagious
      - dermatitis and hair loss
      - results in economic losses
- - - - use mineral oil
      - scrape edge of lesion
      - scrape multiple sites
- - - - easier to find than scabies
- - - - horses, cattle, sheep, goats, camelids
    - - canids
    - - only louse in cats
- - - - pigs, horses, cattle, camelids
- - - - 8 to 11 months in the stomach
- - - - several months later larvae migrate to host's back and form SQ nodules and breathinghole
        
        several months later, larvae emerge and pupate on the ground
- - - - assocaited with fly striek and fly blow
      - opportunistic parasite
      - elongated bodies
      - present on body surface
      - feed on necrotic tissue, hair stained with blood, urine, or feces
    - - obligate parasite (requires a host)
      - found in specific internal locations in the host
      - barrel shaped, rows of spines on body