List some microorganisms that may cause cavitary pneumonia.
Common bacteria (Streptococcus pneumoniae, Staphylococcus aureus, Klebsiella pneumoniae and Haemophilus influenzae), typical and atypical mycobacteria, fungi (Aspergillosis spp., Pneumocystis jiroveci), and parasites.
Bibasal small airways opacification. Blunting of the left costophrenic angle.