Pneumonia
From Radipedia
Can have varying radiographic appearance for different pathogens.
Lobar pneumonia: classically Streptococcus pneumoniae (pneumococcus), intra-alveolar spread
Bronchopneumonia: classically Staphylococcus aureus, spreads via airways, diffuse patchy appearance
Interstitial pneumonia: classically atypicals and viral, spreads along septa, reticulonodular appearance