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Some Diagnostic Method

  1. Tzanck smear               
    1. Vesicles are scrapped and stained with Giemsa/ Wright's stain.
    2. HSV / VZV - multinucleate giant cells+.
    3. Pemphigus- Acantholytic cells
  2. Diascopy                       
    1. Erythema - blanches with pressure
    2. Purpura- does not blanch
    3. Granuloma - Apple jelly appearance
  3. Köbner’s phenomena is seen with (Traumatized area often develops lesions esp elbow, knee)                               
     
  4. Nikolsky’s sign +ve in
    1. Pemphigus                                               
    2. TEN
    3. Steven Johnson's syndrome                 
    4. Staphylococcal scalded skin syndrome

→ Normal turnover time for epidermis,' 8 weeks (52-75 days)

→ Fungi which give fluorescence in wood's light are ; - M. Canis, M. audouinii, T. schoenleinii

→ KOH preparation,' Used for Dig of Tinea infections

→ Patch test,' read after 2 days and 4 days
 

 Different  itch
 

1. Winter itch Asteotic eczema / xerotic eczema
2. Swimmer’s itch Bilharziasis / Schistosomiasis
3. Dhobi’s / Jock itch Tinea cruris
4. Ground itch Nematode Larvae
5. Barber’s itch Sycoses barbae
6. Itch mite Acarus scabei (which transmits Scabies).





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