CCL20 and infection: These results are in agreement with our own, with the only major notable difference being that the gene most induced by S. marcescens WT bacteria was CXCL8, a neutrophil chemoattractant important for neutrophil migration to the site of infection and clearance of bacteria, whereas S. aureus most induced CCL20 a chemokine with antibacterial properties [33]—the third most highly induced gene in our study.