Skin disorders

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Skin disorders
2010-09-10 13:39:43

Skin Pathology
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  1. Impetigo
    • honey crusts on erythematous base, pus-filled vesicles,
    • Staphylococcus aureus (90%) catalase pos coagulase pos GPC in clusters;
    • Group Astreptococcus beta hemolytic catalase neg bacitracin sensitive PYR pos Gram
    • positive cocci (GPC) in chains
  2. Erysipelas
    brawny red induration (form of cellulitis) facelower extremity caused by Group A Streptococcus
  3. Staphylococcal scalded skin syndrome
    infant with fragile subcorneal bulla not containing inflammatory cells rupturing easily due to epidermolytic toxins produced by staph infection elsewhere such as otitis or pharyngitis
  4. Toxic Shock Syndrome
    • erythemaof skin
    • super absorbent tampons (or left in too long)
    • hypotension
    • TSST-1toxin producing S. aureus
  5. Streptococcal Toxic Shock-like Syndrome (Toxic strep)
    • petechial purpuric skin lesions following minor trauma
    • hypotension
    • necrotizing fasciitis
    • Group A Streptococcus
  6. Necrotizing fasciitis
    • Type I polymicrobial trauma surgery Staphylococcus aureus;
    • Type II Group A Streptococcus;
    • Type III Clostridium perfringens or C. septicumgas gangrene
  7. Treponema pallidum
    • syphilis
    • primary painless punched out chancre rolled borders penile shaft or vulva
    • secondary papulosquamous rash on trunk palms, soles lymphadenopathy;
    • diagnosis serologic RPR confirmation FTA; plasma cells endoarteritis obliterans; Warthin Starry
  8. Hemophilus ducreyi
    • chancroid, multiple painful ragged ulcers irregular borders on penile shaft,
    • Gram stain school of fish GNB,
    • painful inguinal lymphadenopathy