16 parasitic infection of skin

							PARASITIC INFECITONS
      OF SKIN
             SCABIES

•Children <5 yrs
  – Close contact for 15-20 min with
  – Infected person, overcrowding
          Diagnostic Criteria
•   Intense itching-nocturnal
•   Sites-web spaces, flexors of wrist,
•   Elbow, anterior axillary folds
•   Positive family history
•   Burrow in web space, wrists, penis
•   Demonstration of mite
        Type of scabies
• Classical scabies
• Nodular scabies:
• Scabies in clean: Moderate itching, in
  those with good hygiene
           Type of scabies
• Crusted/Norwegian scabies: in immuno compromised
  Scabies in children :involve scalp, face, palms, soles

• Scabies incognito: where picture is altered by steroids

• Animal scabies: no burrow or mite, self limited.
              Complications
• Secondary pyoderma, impetigo, furuncles 
 glomerulonerphritis
• Eczematisation
• Lichenification
• Urticaria
                Treatment
• Permethrin 5%-single use, for 12 hrs

• Gammabenzene hexachloride 1% -single use

• Benzyl benzoate 25% (125% in children<2 yrs) -3
  consecutive applications 12 hr apart
 PEDICULOSIS -P.CAPITIS
• Intense pruritus of scalp, dry lusterless hair
• Lice more on post auricular area, lower hair margin
• Nits-shiny oval bodies attached to hair shaft
• Complications-seco pyoderma,cervical
  lymphadenonathy.
• Trt: Permethrin1%, gamma Benzene hexa chloride
P.CORPORIS (Vagabond’s diseases)
 • Generalised itching, parallel liner scratch marks,
   erythematous macules, Hyperpigmentation,
   lichenification
 • Trt: Laundering, dry cleaning ironing clothes, dusting
   malathione powder into
 • Inner side of clothing
    P.PUBIS/PHTHIRIASIS
• Crab louse seen as grayish specks in pubic area, eye
  lashers, axilla, firmly attached to skin, nits on hair
• Trt:
    –    Lindane cream or shampoo
    –    Launder and iron clothes
    –    Treatment of sexual contact
                    MYIASIS
• Invasion of mammalian tissue by larvae of dipterous
  sp: of files
• Cutaneous:
          :Creeping eruption
          : Furnucular
          :wound myiasisicggs laid in open
          :wounds
     CREEPING ERUPTION
LARVA MIGRANS
• Migratory liner winding skin lesions due to the burrowing of larva

• Sites: feet buttocks, back, hands, genital

• Start as local itching, papules followed by thin tortuous lines

  which migrate at 2cm/day

• Trt: Thiabendazole 50 mg/kg/day 12 hourly for 2 days, extraction

  of larva with needle