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Background <p>Parvimonas micra is an anaerobic bacterium that colonizes the oral cavity and gastrointestinal tract. This organism can lead to severe infections elsewhere in the body. We report an unusual case of pleural effusion secondary to Parvimonas micra infection. We will explore the diagnostic difficulties and potential risk factors associated with this type of infection.</p> Case presentation <p>A 51-year-old male presented with respiratory symptoms and was diagnosed with Parvimonas micra from pleural fluid culture. The patient was empirically treated with antimicrobial therapy in the form of piperacillin and tazobactam, which was switched to Linezolid and augmentin after the final culture results. The patient clinically improved after the completion of treatment during subsequent follow-ups.</p> Conclusion <p>Anaerobic infections poses diagnostic challenge to clinician’s due to their vague clinical presentation and scarcity of those infections to develop in otherwise healthy individuals.</p>

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A rare cause of pleural effusion with Parvimonas micra: a case report

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月19日

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  • Hamad Ebrahim Alkaabi,
  • Khalifa Abdulrahman Yusuf,
  • Abdallah Ahmed Ibrahim,
  • Shadi Fayez Kanhosh,
  • Abdulrahman Hasan Al-Madani

摘要

Background

Parvimonas micra is an anaerobic bacterium that colonizes the oral cavity and gastrointestinal tract. This organism can lead to severe infections elsewhere in the body. We report an unusual case of pleural effusion secondary to Parvimonas micra infection. We will explore the diagnostic difficulties and potential risk factors associated with this type of infection.

Case presentation

A 51-year-old male presented with respiratory symptoms and was diagnosed with Parvimonas micra from pleural fluid culture. The patient was empirically treated with antimicrobial therapy in the form of piperacillin and tazobactam, which was switched to Linezolid and augmentin after the final culture results. The patient clinically improved after the completion of treatment during subsequent follow-ups.

Conclusion

Anaerobic infections poses diagnostic challenge to clinician’s due to their vague clinical presentation and scarcity of those infections to develop in otherwise healthy individuals.