It is testing to see if your body has produced anti-bodies in response to exposure to the bacteria.  Even if you are positive on the test, you may not have the disease, so a positive test is followed up with a chest X-ray and monitoring.  If you have had TB and were cured, you will … Read more

Since TB is an intracellular disease it is necessary to test for antibodies rather than the presence of the bacteria itself.  It's why one positive means you'll always test positive (and usually have to have indications on your records to that effect).  It's also pretty sketchy as to telling whether people actually have TB- you … Read more

Since TB is an intracellular disease it is necessary to test for antibodies rather than the presence of the bacteria itself.  It's why one positive means you'll always test positive (and usually have to have indications on your records to that effect).  It's also pretty sketchy as to telling whether people actually have TB- you … Read more