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Related to community-acquired pneumonia: Nosocomial pneumonia
community-acquired pneumonia (CAP),
pneumonia caused by any organism found regularly outside the hospital; common organisms include Streptococcus pneumoniae, Haemophilus influenzae, and Mycoplasma, as opposed to hospital-acquired or nosocomical pneumonia.
Pneumonia that a person acquires outside of a hospital or other health care institution, as distinguished from nosocomial, or hospital-acquired pneumonia.
community-acquired pneumoniaPneumonia caused by an infection currently present in the community; CAP is the most common cause of infectious death–US, and number 6 killer overall; of the 57% of CAPs in which a pathogen is identified, S pneumoniae causes 60%, H influenzae 15%, Legionella pneumophila 10-15%, Staphylococcus aureus 2-10% Clinical Atypical pneumonia with delayed recognition; early SX are distinctly nonpulmonary–eg, dry cough, myalgia, arthralgia Diagnosis Pathogens in pleural fluid or blood cultures, Pneumocystis carinii in sputum or BAL, a 4-fold ↑ in Mycoplasma pneumoniae antibody titers, isolation of L pneumophila, or a 4-fold ↑ in L pneumophila antibody titers, or positive direct fluorescent antibody test for legionella, S pneumoniae antigen in serum, urine Risk factors Alcoholism, seizure disorders, smoking, immunosuppression
Pneumonia occurring in outpatients, often caused by infection with streptococcus, Haemophilus influenzae, Staphylococcus aureus, and atypical organisms such as Legionella species. Mortality is approximately 15% but depends on many host and pathogen features.
See also: pneumonia