Pontiac Fever

(aka Humidifier Fever, Sump Bay Fever, Bath Water Fever)

Etiology

  • Aerosols from Contaminated Water Sources
    • Hot Tubs
    • Saunas
    • Commercial Humidifying Systems
    • Metal Machines Cooling Fluid

Physiology

  • Inhalational Exposure to Aerosols from Water Contaminated with Legionella (see [[Legionellosis]]) and Other Organisms
    • Possibly Cytokine-Mediated

Diagnosis

  • CXR/Chest CT: usually normal (if infiltrates are present, should suggest alternative diagnosis)
  • CBC: leukocytosis may be seen
  • ABG: hypoxemia is unusual
  • FOB: marked influx of neutrophils

Clinical

  • Timing of Onset: symptoms occur 4-8 hrs after acute inhalation of aerosols
  • Features
    • Mild Dyspnea (see Dyspnea)
    • Cough (see Cough)
    • Fever (see Fever)
    • Flu-Like Syndrome
      • Malaise
      • Chills
      • Myalgias

Treatment

  • Self-Limited: usually spontaenously resolves within 12-48 hrs

References

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