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Updated: Feb 4, 2026

Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion
Published on: November 10, 2023
A rare case of pleural effusion due to Prevotella dentalis
Fernando Cobo1, Elizabeth Calatrava1, Javier Rodríguez-Granger1
1Department of Microbiology, University Hospital Virgen de las Nieves, Granada, Spain.
Abstract:
Prevotella dentalis is a Gram-negative anaerobic rod involved in various human diseases, especially oral infections. We report a rare case of a pleural effusion due to this microorganism in an elderly patient. An 88-year-old man with chronic respiratory disease presented with a left pleural effusion for more than 1 month. Culture of drained pleural fluid resulted in isolation of P. dentalis. Resistance to penicillin and moxifloxacin was documented. Treatment with drainage and clindamycin was established, but the patient developed cognitive impairment and died after a worsening of his general condition.
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