| BALF | Bronchoalveolar Lavage Fluid |
| CAP | Community-acquired Pneumonia |
| CT | Computer tomography |
| HAP | Hospital-acquired Pneumonia |
| HCAP | Healthcare-associated Pneumonia |
| mNGS | Next-Generation Sequencing |
| MRSA | Methicillin-Resistant Staphylococcus aureus |
| MSSA | Methicillin-Sensitive Staphylococcus aureus |
| NP | Necrotizing Pneumonia |
| PVL | Panton-Valentine Leucocidine |
| tPA | Tissue Plasminogen Activator |
| U.S. | United States |
| US | Ultrasound |
| VAP | Ventilator-associated Pneumonia |
| VATS | Video Assisted Thoracic Surgery |