IL1A and peritonitis: Gross et al. (2012) reported that in a murine model of monosodium urate (MSU)-induced peritonitis, neutrophil recruitment to the peritoneal cavity was significantly impaired in Il1a−/− mice. Similarly, Caffrey et al. (2015) demonstrated impaired neutrophil recruitment to the lungs of Il1a−/− mice in a model of pulmonary aspergillosis (Caffrey-Carr et al., 2017).