After two days of mechanical ventilation (MV2), patients who developed VAP continued to show a significantly lower level of IL-17A compared to patients who did not develop VAP (91 pg/mL ± 22.0 SEM versus 227 pg/mL ± 16.6 SEM, respectively; p = 0.003; Figure 3A). This evidence concerns the gene IL17A and ventilator-associated pneumonia.