II. Epidemiology

  1. Highest Incidence among elderly
    1. Nursing Home epidemics have recently been identified
    2. Reference
      1. Troy (1997) JAMA 277:1214-8 [PubMed]
  2. Also common in young adults
  3. Causes 6-10% of Community Acquired Pneumonia
  4. Higher risk with comrobid illness

III. Pathophysiology

  1. Caused by Chlamydophila pneumoniae (Chlamydia pneumoniae, TWAR)
  2. Contrast with Neonatal Chlamydia Pneumonia caused by Chlamydia trachomatis via vertical transmission in newborns

IV. Symptoms

  1. Atypical Pneumonia presentation
    1. Similar to Mycoplasma pneumoniae
  2. Cough (88%): Minimally productive if at all
  3. Fever (80%)
  4. Shortness of Breath (73%)
  5. Chills (73%)
  6. Nausea (73%
  7. Headache (56%)
  8. Myalgia (50%)
  9. Chest Pain (46%)
  10. Rhinitis (46%)
  11. Diarrhea (42%)
  12. Sore Throat (42%)
  13. Hoarseness (36%)

V. Labs

VI. Radiology: Chest XRay

  1. Localized segmental infiltrate

VII. Management: Antibiotic for 10 to 14 days

VIII. Prognosis

  1. Mortality may approach 9% in edlerly with comorbidity

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