CFTR and cystic fibrosis: To determine whether P. aeruginosa promotes S. salivarius colonization in the context of the CF lung, we infected wildtype bronchial epithelial cells (16HBE) and CFTR KO bronchial epithelial cells (CFBE) with PAO1 and S. salivarius strain K12 and quantified adherent CFUs after 6 hours (Figure 1A).