Severe Pyothorax Caused by Streptococcus pseudoporcinus and Prevotella buccae: A Case Report

Area of Science:

• Infectious Diseases
• Microbiology
• Pulmonology

Background:

• Pyothorax involves purulent pleural effusion, often secondary to pneumonia or lung abscess.
• Accurate pathogen identification is crucial for effective pyothorax treatment.
• Pleural fluid culture sensitivity for pathogen detection is frequently low.

Observation:

• A rare case of severe pyothorax necessitated mechanical ventilation.
• The patient presented with significant respiratory distress requiring intensive care.
• Diagnosis was complicated by the unusual pathogens identified.

Findings:

• *Streptococcus pseudoporcinus* and *Prevotella buccae* were isolated from the patient's pleural fluid.
• These bacteria are rarely reported as causative agents of pyothorax.
• The infection progressed rapidly, leading to severe clinical manifestations.

Implications:

• This case highlights the potential for beta-hemolytic streptococci to cause severe, rapidly progressive pyothorax.
• It expands the spectrum of known pathogens associated with this serious condition.
• Clinicians should consider a broader range of microorganisms in pyothorax, even rare ones.