Diagnosis may be difficult.Nocardiae are weakly acid-fast organisms and can be visualized by  modified Ziehl Neelsen stains like Fite-Faraco method. In the clinical laboratory, routine cultures may be held for insufficient time to grow nocardiae, and referral to a reference laboratory may be needed for species identification.
Nocardiosis laboratory findings
Tuberculosis laboratory findings
Pneumonia laboratory findings
Bacterial pneumonia laboratory findings
Pulmonary embolism laboratory findings
Aspergillosis laboratory findings
Typhus laboratory findings
Streptococcus pneumoniae infection laboratory findings