Question: what gram negative bacteria causes pneumonia?
Answer: Gram-negative bacteria include the following: Pseudomonas aeruginosa: P aeruginosa is an aerobic, motile bacillus often characterized by its distinct (grapelike) odor. Klebsiella pneumoniae: K pneumoniae is a facultatively anaerobic, encapsulated bacillus that can lead to an aggressive, necrotizing, lobar pneumonia.