Pasteurella Pneumonia With Complicated Parapneumonic Effusion in a Pet Owner

Hajar El Amri1, Soomal Rafique1, Ali Zubairi2

  • 1Internal Medicine, Southern Illinois University School of Medicine, Springfield, USA.

Cureus
|April 2, 2025
PubMed

Insights

Pasteurella multocida, a bacterium common in pets, rarely causes empyema (pus in the chest cavity). This case highlights its potential as a respiratory pathogen in individuals with chronic obstructive pulmonary disease and pet exposure.

Area of Science:

  • Infectious Diseases
  • Pulmonary Medicine
  • Microbiology

Background:

  • Pasteurella multocida is a Gram-negative coccobacillus.
  • It is a common component of oral flora in domestic animals like dogs and cats.
  • Typically associated with soft tissue infections post-animal bite/scratch.

Observation:

  • A case of empyema caused by Pasteurella multocida is presented.
  • The patient was a middle-aged woman with severe chronic obstructive pulmonary disease (COPD).
  • The infection followed a complicated course requiring prolonged antibiotic treatment, despite no reported animal bites or scratches.

Findings:

  • Sputum cultures confirmed Pasteurella multocida as the causative agent.
  • Empyema due to P. multocida is a rare clinical presentation.
  • The patient had significant comorbidities (COPD) and pet exposure.

Implications:

  • Highlights P. multocida as a potential respiratory pathogen, especially in immunocompromised individuals with pets.
  • Underscores the importance of considering P. multocida in respiratory infections beyond typical animal-associated wounds.
  • Emphasizes the need for early diagnosis and targeted therapy for effective management of rare P. multocida empyema.

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