Abstract

1. Abstract
Parvimonas micra and Prevotella oralis are both anaerobic pathogens that commonly cause periodontitis and are widely present in the oral cavity, gastrointestinal tract, and skin. These bacteria can cause infections in sites other than the oral cavity, but few cases causing severe pulmonary lesions have been reported thus far. Here, we report a case of pyopneumothorax caused by a co-infection of Parvimonas micra and Prevotella oralis.