SMOX and cystic fibrosis: Growth curves of PAO1 and LESB65 in airway media suggest a doubling time for PAO1 in CF media of 74 minutes (in both CFSM and CFLM), similar to the findings ofYang et al. for PAO1 in CF sputum (66 minutes).18 The doubling time of PAO1 was ~85 minutes in healthy sinus and lung media.