Laboratory findings such as leukocytosis are helpful for the diagnosis of bacterial pneumonia or to assess the status of the patient.  Sputum samples need to be collected from every patient and gram staining and culture need to be performed to determine the exact pathogen causing the pneumonia. Other tests include urine antigen test, PCR, C-reactive protein, and procalcitonin.
Pneumonia laboratory findings
Bacterial pneumonia laboratory findings
Respiratory failure laboratory findings
Farmer's lung laboratory findings
Pulmonary embolism laboratory findings
Community-acquired pneumonia laboratory findings
Hospital-acquired pneumonia laboratory findings
Tuberculosis laboratory findings