IL17A and escherichia coli infection: In addition, some studies found that γδ T cells were the predominant IL-17-producing cells that eliminated bacteria-induced pathogens, such as E. coli or S. aureus. γδT cells were found to be the primary producers of IL-17 after E. coli infection; antibody depletion of γδT cells led to a decline of IL-17 production and less neutrophil infiltration to the peritoneum (67).