Radiographical findings | Clinical circumstance | Organism |
Segmental consolidation | Community-acquired | S. pneumonia , M. pneumoniae |
Lobar consolidation | Community-acquired Diabetes | S. pneumoniae (2/3 of community-acquired pneumonias) K. pneumoniae Gramnegative bacilli |
Rounded pneumonia | Community-acquired Alcoholic | S.pneumoniae |
Bronchopneumonia | Hospital-acquired | P. aeruginosa, S. aureus, streptococci, Gram negative bacilli, anaerobes, M. pneumoniae, aspiration, L. pneumophila, |
Interstitial pneumonia | Community-acquired (winter) | Virus, M. pneumoniae |
Cavitation/necrosis | Aspiration COPD | S.aureus, Gramnegative bacilli, anaerobes,actinomycosis, M. Tuberculosis Aspergillus |
Multiple cavitary nodules | Drug addict | S. aureus |
Pneumatoceles | Postinfluenza | S. aureus |
Empyema | Complication of pneumonia | S. pneumoniae S. aureus Gram negative bacilli M. tuberculosis |
Chest wall invasion | Alcoholic | Actinomycosis M. tuberculosis Fungi |
Lymphadenopathy | M. pneumoniae M. tuberculosis |
COPD: chronic obstructive pulmonary disease
S. pneumoniae: Streptococcus pneumoniae
S. aureus: Staphylococcus aureus
M. tuberculosis: Mycobacterium tuberculosis
M. pneumoniae: Mycoplasma pneumoniae
K. pneumoniae: Klebsiella pneumoniae
P. aeruginosa: Psoudomonas aeruginosa
L. pneumophila: Legionella pneumophila
Adapted from 34