S2M3 ECTOPARASITES

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Author:
sweetlu
ID:
146120
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S2M3 ECTOPARASITES
Updated:
2012-04-06 17:43:38
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S2M3 ECTOPARASITES
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S2M3 ECTOPARASITES
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  1. Pediculus humanis capitis
    • - head louse
    • - causes puritis and skin irritation
    • - tx- lindane
  2. Pediculus humanus humanus
    • - body louse
    • - causes puritis
    • - vector for typhus, trench fever and relapsing fever
    • - tx- lindane
    • - often found on homeless and can cause the leathery skin (homeless fever)
  3. Pthirus pubis
    • - crab louse (pediculosis inguinalis or pthiriasis)
    • - intense itching
    • - sexually transmitted
    • - tx- lindane
  4. pulex irritans
    • - human flea
    • - causes pruritis and erythema
    • - vector of plague and murine typhus
    • - tx- antipruritics and antihistamines
  5. sarcoptes scabei
    • - causes scabies, loves skin creases
    • - intense itching
    • - transmission by direct contact
    • - mite in skin scrapings dissolved in KOH
  6. demodex spp
    • - human follicle mite
    • - associated with acne, blackheads, blepharitis and truncal rashes
    • - papular folliculitis in immunocompromised
    • -
  7. Eutombicula spp/ Trombicula automnalis
    US Europe
    • - chiggers
    • - larvae cause intense pruritis and dermatitis with erythmatous marks progressing to papules and nodules
    • - vector for scrub typhus
    • - tx- antipruritics and antihistamines
  8. Dermacentor andersoni/ variabilis
    • - tick
    • - usually cause erythmatous papules, but can occasionally cause paralysis (rocky mountain spotted fever)
    • - vector for Lyme disease (erythma migrans)
  9. Cimex lectularius
    • - bed bug
    • - small red lesions to hemorrhagic bullae, pruritis, sleeplessness, anemia
    • - linear lesions
  10. kissing bugs
    • - triatomes
    • - small red nodules, Romanas sign
    • - vector of T. cruzi (Chagas disease)
    • - nocturnal feeding
  11. Loxosceles reclusa
    • - brown recluse, violin spider
    • - intense local pain
    • - venom: phospholipase & sphingomyelinase D => necrosis
    • - eschar formation
    • - tx is palliative
  12. Lactrodectus spp
    • - black widow, hour glass
    • - causes lactrodectism (neuromyopathic araneism)
    • - generalized pain, N/V, faintness, vertigo, perspiration
    • - venom= a-latrotoxin
    • - tx- antivenom
  13. Centruroides spp and Tityus spp.
    • - scorpions
    • - venom- neurotoxin and hemolytic toxin
    • - radiating, burning pain, swelling, discoloration and necrosis
    • - tx- antivenom w/in 1 hour

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