Hi.. I received a tb test on Wednesday where the technician did not use an alcohol swab and also I had pretty significant bleeding. I went back Friday to have it read and it took 3 people to determine whether or not it was positive. It was red but there was no visible sign of induration. They were feeling both arms and trying to decide if I had a bump or it was just my muscle. One person finally decided he thought he felt a bump so they claim it measured 13 and called it positive. I was reading that if you are at low risk and don t have any risk factors you are only positive if 15 or more us measured. I am waiting on the results from my chest xray but strongly believe they administered the test wrong. Given this information what are the chances this is a false positive and how can I prove it so I m not considered to have latent tb.