Tuberculosis Home > Tuberculosis Diagnosis

Other Tests Used to Make a Diagnosis

If people have a positive TB test, other tests can help to show if they have active tuberculosis. In making a diagnosis of active tuberculosis, doctors rely on symptoms and other physical signs, the person's history of exposure to tuberculosis, and x-rays that may show evidence of a tuberculosis infection.
The healthcare provider will also take sputum and other samples to see if the TB bacteria will grow in the lab. If bacteria are growing, this positive culture confirms a tuberculosis diagnosis. Because M. tuberculosis grows very slowly, it can take up to 4 weeks to confirm the diagnosis. An additional 2 to 3 weeks are usually needed to determine which antibiotics to use to treat the disease.
Written by/reviewed by:
Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
List of references (click here):
Other Articles in This eMedTV Presentation

Topics & Medications


Related Channels

eMedTV Links
Copyright © 2006-2019 Clinaero, Inc.

eMedTV serves only as an informational resource. This site does not dispense medical advice or advice of any kind. Site users seeking medical advice about their specific situation should consult with their own physician. Click Terms of Use for more information.

This site complies with the HONcode standard for trustworthy health information:
verify here.