Hi i have a question about my tb blood test results I am pregnant so I am unable to take the x-ray. Also I was born in south america and had the bcg shot as an infant Name Value Reference Range NIL 0.040 UI/mL MITOGEN-NIL 10.065 IU/mL TB Ag-NIL 0.479 IU/mL INTERFERON GAMMA RESULTS POSITIVE NEGATIVE