Figure 4

Immunohistochemistry analysis revealed a diffused staining of IL-17A in the epithelium, sub-epithelial tissues, and lymphoid follicles. The difference in IL-17A expression in adenoid tissues between patients positive and negative for pneumococcal carriage was more significant for SDB patients than for OME patients. SDB: sleep-disordered breathing; OME: otitis media with effusion; SPn: S. pneumonia.