In a previous study, we clarified the role of IL17-γδ T cells in innate immunity during acute P. aeruginosa pulmonary infection, measuring the proportion of IL17-γδ T cells in lung mononuclear leukocytes at 4, 8, and 12 h post infection and demonstrating that IL17-γδ T cells participate in neutrophil chemotaxis to enhance innate immunity (Liu et al., 2011, 2013). Here, IL17A is linked to infection.