DEAR MAYO CLINIC: My daughter’s doctor said her PPD was positive and sent her for a chest X-ray to rule out TB. Is it possible to have a false-positive result? Her pediatrician says she should follow ...

DEAR MAYO CLINIC: My daughter’s doctor said her PPD was positive and sent her for a chest X-ray to rule out TB. Is it possible to have a false-positive result? Her pediatrician says she should follow ...

False positives in these types of tests, which identify immune markers rather than the disease-causing bacteria, can happen for a few reasons.

A TB blood test can find out whether you have the Mycobacterium tuberculosis bacteria in your body. Whether you need to get tested and how often depends on your specific circumstances. A blood test ...

Researcher found that exposed individuals with confirmed TB infection -- i.e. a positive skin or blood test -- should receive priority treatment in settings with a low prevalence of the disease, ...

Add Yahoo as a preferred source to see more of our stories on Google. Tuberculosis, or TB, is a disease that infects nearly 11 million people worldwide, killing some 1.25 million of them every year, ...

Dear Doctors: I got a tuberculosis skin test for my health care job and tested positive. A follow-up blood test was also positive, and I was diagnosed with latent TB. However, I had no known exposure.