“…This complication is more common in patients with diabetes mellitus . A subset of PLA is characterized by gas formation (gas-containing PLA; Hayashi et al 1989;Ukikusa et al 2001;Chen et al 2008a;Chong et al 2008;Huang et al 2009;Oh et al 2011;Safe et al 2013). In part of these PLA, the bacteria causing the infection express formic hydrogen lyase, leading to mixed acid fermentation and gas formation.…”