This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
All are impoant pathogens causing pneumonia in COPD patients, EXCEPT: 
Select and explain. 
A. Haemophilus influenzae, B. Pseudomonas aeruginosa, C. Legionella spp, D. Klebsiella pneumoniae
D: Klebsiella pneumoniae
Answer: D: Klebsiella pneumoniae 
Explanation: All are impoant pathogens causing pneumonia in COPD patients Haemophilus influenzae Pseudomonas aeruginosa Legionella spp S. pneumoniae Moraxella catarrhalis Chlamydia pneumoniae Klebsiella is an impoant pathogen causing pneumonia in chronic alcoholism. Ref: Harrison, E-18, P-2132