<prompt> Most impoant pathogen causing pneumonia in a patient with bronchiectasis is:Streptococcus pneumoniaeOral anaerobesAcinetobacter sppStaphylococcus aureus  <response>: Impoant pathogen causing pneumonia in a patient with bronchiectasis 1. P. aeruginosa 2. Burkholderia cepacia 3. Staphylococcus aureus All others in the list are causing pneumonia in chronic alcoholic patients Ref: Harrison, E-18, P-2132. 