CXCL1 and peritonitis: To assess the importance of neutrophil aggregation on the adhesive properties of the omentum independent of fluid flow, we measured ex vivo the capacity of the omentum to capture bacteria relevant to peritonitis by briefly incubating fluorescently labeled E. coli bioparticles with omentum samples isolated from untreated control mice, or from mice undergoing Zymosan-induced peritonitis that had been treated with isotype control antibodies or anti-CXCL1 antibodies in vivo (Figure 6A).