Lesson 18 [Skin Infections]

• Skin abscess, encapsulated, so not reached by antibiotics


  Folliculitis
• Vesicular lesions over entire skin surface, fever, most common in infants

  Scalded Skin Syndrome
• 1. sore throat, fever, rash caused by toxins
  2. can lead to rheumatic fever and other complications


  Scarlet fever
• Skin lesions spread to systemic infection; common and fatal before antibiotics were available

  Erysipelas
• Skin lesions, usually in children, easily spread by hands and fomites

  Pyoderma and Impetigo
• Skin lesions caused by excess of male sex hormones, infection is secondary, common in teenagers

  Acne
• Growth of bacteria under eschar, often a nosocomial infection; difficult to diagnose and treat, causative agents typically antibiotic resistant

  Burn Infections
• Mild disease with maculopapular exanthema (discolored, pimply rash); infection early in pregnancy can lead to congenital rubella


  Rubella
• Severe disease with fever, conjunctivitis, cough, and rash, encephalitis is a complication; occurs mainly in children


  Rubella
• Sudden fever, followed by rose-colored rash; virus shed in saliva

  Roseola
• Generalized macular (discolored) skin lesions

  Chickenpox
• Pain and skin lesions, usually on trunk; occurs in adults, susceptible children exposed to cases of shingles can develop chickenpox


  Shingles
• Eradicated by immunization as a human disease


  Smallpox
• Clear or bluish vesicles on skin surfaces, human infections are rare

  Other pox diseases
• Dermal warts are self-limiting, malignant warts occur in immunologic deficiencies cause of 99% of cervical cancer


  Warts
• Dry, scaly lesions on various parts of the skin: difficult to treat 


  Dermatomycosis
• Granulomatous, pus-filled lesions; sometimes disseminates to lungs and other organs 


  Sporotricosis
• Granulomatous, pus-filled lesions that develop in lungs and wounds; sometimes disseminates to other organs 


  Blastomycosis
• Patchy inflammation of mucous membranes of the mouth (thrush) or vagina (vaginitis); disseminated nosocomial infections occur in immunodeficient patients

  Cadidiasis
• Wound infection in immunodeficient patients also infects burns, cornea, and external ear

  Aspergillolis
• Occurs mainly with untreated diabetes, begins in blood vessels and can rapidly disseminate

  Zygomycosis
• Initial lesions spread and become chronic and granulomatous, can require amputation

  Madura Foot
• Itching due to cercariae burrowing into skin; immunological reaction prevents their spread

  Swimmer's ich
• Larvne ingested in crustaceans in contaminated water migrate to skin and emerge through lesion, juveniles cause severe allergic reactions


  Dracunculiasis