It is ordered when a person has a chronic cough and X-ray shows abnormal findings along with the following signs and symptoms:
If the pathogenic bacteria is present, it means the person is suffering from lower respiratory tract bacterial infection.
The following bacteria can be present:
If bacteria are not detected, then it could mean that the person may be suffering from a viral infection. It is also possible that the person is suffering from a bacterial infection in which certain kind of bacteria like Mycoplasma pneumonia, Mycobacterium tuberculosis are not detected.