<prompt> The most common cause of pulmonary infection in cystic fibrosis isPseudomonas AeroginosaStaphylococcus AureusBukholderia cenocapaceaNontuberculous mycobacteria  <response>: Answer is A Pseudomonas Aeroginosa: The most common cause of Pulmonary infections in cystic fibrosis is Pseudomonas aeroginosa The most common pathogen in CF is Pseudomonas Aeroginosa followed by Staphylococcus - Pseudomonsa:Getntnu Molecular Biology Harizon Scientific Press2008160 Pulmonary Infection in Cystic Fibrosis The most common cause of Pulmonary infection in cystic fibrosis in children is staphylococcus aureusQ The most common cause of Pulmonary infection in cytic fibrosis in adolescents and adults is Pseudomonas Aeroginosa. The two most common cause of pulmonary infection in cystic fibrosis are staphylococcus aureus and Pseudomonas Aeroginosa. Overall all age groups Pseudomonas Aeroginosa is marginally more common than staphylococcus aureus as a cause of pulmonary infection in cystic fibrosis. The most common organism causing chronic lung disease in patients with cystic fibrosis is pseudomonas aeroginosa 