What is your approach to the management of a newly acquired Pseudomonas aeruginosa infection that was not eradicated with initial treatment in a patient with CF?  

I think this is a situation where shared decision making with patient is required; in general, would aim for second round of eradication with different antibiotic (for example if tobramycin was used first, inhaled aztreonam would be next) or consideration of a second month; however, chances of eradi...