放線菌膿胸の1例

Actinomycosis Empyema：Report of a Case

はじめに　放線菌は口腔内常在菌の一種で，嫌気性もしくは微好気性のGram陽性桿菌である．肺感染症の起因菌として知られるが，膿胸の報告例はまれである．われわれは，放線菌による多房性膿胸に対して手術を行った症例を経験したので報告する．

A 73-year-old man was referred to our hospital with a right pleural effusion. Chest computed tomography （CT） showed multifocal pleural effusion, and chest drainage was performed. Actinomyces meyeri was detected in the pleural fluid culture. Despite antibiotic treatment, the patient’s condition did not improve, and a curettage was performed for empyema. The chest tube was removed on postoperative day 7 and the patient was discharged home uneventfully on day 21. Intravenous antibiotics were given for 16 days, followed by oral antibiotics for 6 months. Actinomycosis empyema is a rare disease with no established duration of treatment, but a total of 6 to 12 months of treatment is generally recommended.