What if xray shows old tb infection but other tests come negative

what if xray shows old tb infection but other tests such as afb smear and mantoux skin test declares negative for Tb and been tested in Salmaniya medical complex, general hospital of bahrain. any advice for this? thanks in advance

Has been discussed many times before and is even listed clearly on the LMRA website.  Extract follows.


Rules for considering unfit for work:

Tuberculosis any type:

A- Pulmonary by chest X-ray showing active or past evidence of old T.B.


Chest X-ray is evidence of past TB.  The other tests are only looking for active TB.