<prompt> The most common cause of pulmonary abscesses in Cystic Fibrosis is?Pseudomonas aeruginosaStaphylococcus aureusBurkholderia cenocepaciaNontuberculous mycobacteria  <response>: Pseudomonas aeruginosa REF: Mayo Clinic Internal Medicine Board Review 9th edition Page 845, Infectious diseases of the respiratory tract by Michael E. Ellis Page 511 Pseudomonas aeruginosa is a ubiquitous organism commonly isolated from patients with cystic fibrosis and bronchiectasis 