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Monday, March 17, 2014

Cat-scratch Disease





  • This is a specific type of infection that occurs from the scratch of a cat. It is caused by the bacterium Bartonella henselae.

  • Occurs 2 days after scratch (present in 1/3 of patients):
  1. Infected scabbed ulcer
  2. Blister
  3. Blister with pus
  • Occurs 1-3 weeks after scratch:
  1. Fever
  2. Lack of energy
  3. Headache
  4. Swollen lymph glands
  5. Lymph glands may swell, become tender, or exude pus
  6. Rash

  • Scratch or injury by a cat

  • Laboratory:
  1. Elevated white blood cell count
  2. Elevated sedimentation rate
  3. Biopsy of lymph nodes, if necessary, to rule out other causes

  • None required for typical Cat-scratch disease (resolves on its own in 1-2 weeks)
  • Doxycycline, Ciprofloxacin, or Erythromycin for bacillary angiomatosis (see above)
  • Aminoglycosides for Encephalitis (brain infection)

  • Encephalitis (infection spreads to brain)
  • HIV Infection may cause the infection to spread all over the body (called bacillary angiomatosis)

  • Lymphoma
  • Cancer
  • Tuberculosis
  • Cellulitis
  • Abscess
  • Lymphogranuloma venereum

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