A case of empyema caused by Edwardsiella tarda.

In December 2003, a 57-year-old-man was diagnosed as having a hepatic tumor for which he had a hepatectomy. On pathology, the hepatic tumor biopsy specimen was diagnosed as malignant lymphoma. In February 2005, the patient was referred to our hospital because of fever and chest pain. A right pleural effusion was seen on chest X-ray. Microscopic examination of the stained pleural fluid revealed many neutrophils and Gram-negative rods, and Edwardsiella tarda was cultured from the pleural effusion fluid. These findings were consistent with an empyema caused by E. tarda. Therefore, we treated the patient with panipenem/betamipron and thoracic drainage. In this paper, we describe this rare case of empyema caused by E. tarda infection.