The majority of cases related to various gram-negative bacilli (52%) and S. aureus (19%). Others are Haemophilus spp. (5%). In the ICU results were S. aureus(17.4%), P. aeruginosa (17.4%), Klebsiella pneumoniae and Enterobacter spp. (18.1%), and Haemophilus influenzae (4.9%). Viruses -influenza and respiratory syncytial virus and, in the immunocompromised host, cytomegalovirus- cause 10-20% of infections.
Hospital-acquired pneumonia causes
Aspiration pneumonia causes
Community-acquired pneumonia risk factors
Aspiration pneumonia risk factors
Pneumonia risk factors
Farmer's lung causes
Lipoid pneumonia causes
Air embolism causes