In nasal polyp tissue, S. aureus can directly induce the release of the epithelial cell-derived cytokines TSLP and IL-33 by binding to TLR 2, thereby potentially propagating the expression of type 2 cytokines IL-5 and IL-13 in nasal polyp tissue [158,159,160,161]. This evidence concerns the gene IL33 and Nasal polyposis.