Tuberculin Skin Test

I start nursing school in August and I had to get a number of immunizations and tests done to complete my health form. On Friday, I got the MMR, Polio, and Hep B vaccinations. I also had the TB skin test done. I have to go and get the test read tomorrow, but I am curious to know what a positive test looks like. The spot that was injected was itching and I scratched and now it's a small red circle on my arm. It's not a lump or anything, just a red spot where I scratched it. Is this considered positive?? What does it have to look like to be considered positive?? I'm freaking out because I don't have any other symptoms but I would hate to have to pay for an x-ray because of a false positive. The nurse who gave me the vaccinations mentioned something about the other vaccinations interfering with the TB test. Is this true??
A positive TB test is an area of induration or firmness at the injection site that measures greater than 10mm in diameter.

Quote from msjosephI start nursing school in August and I had to get a number of immunizations and tests done to complete my health form. On Friday, I got the MMR, Polio, and Hep B vaccinations. I also had the TB skin test done. I have to go and get the test read tomorrow, but I am curious to know what a positive test looks like. The spot that was injected was itching and I scratched and now it's a small red circle on my arm. It's not a lump or anything, just a red spot where I scratched it. Is this considered positive?? What does it have to look like to be considered positive?? I'm freaking out because I don't have any other symptoms but I would hate to have to pay for an x-ray because of a false positive. The nurse who gave me the vaccinations mentioned something about the other vaccinations interfering with the TB test. Is this true??

Was it a 1 step or a 2 step?I had an weird reaction to the 2nd step. Itching, and redness but NO wheel. The MD and NP that looked at it both decided that it was neg. I've since had 1 step tests be completely negative.

Quote from shammyWas it a 1 step or a 2 step?I had an weird reaction to the 2nd step. Itching, and redness but NO wheel. The MD and NP that looked at it both decided that it was neg. I've since had 1 step tests be completely negative.

Quote from msjosephI start nursing school in August and I had to get a number of immunizations and tests done to complete my health form. On Friday, I got the MMR, Polio, and Hep B vaccinations. I also had the TB skin test done. I have to go and get the test read tomorrow, but I am curious to know what a positive test looks like. The spot that was injected was itching and I scratched and now it's a small red circle on my arm. It's not a lump or anything, just a red spot where I scratched it. Is this considered positive?? What does it have to look like to be considered positive?? I'm freaking out because I don't have any other symptoms but I would hate to have to pay for an x-ray because of a false positive. The nurse who gave me the vaccinations mentioned something about the other vaccinations interfering with the TB test. Is this true??

Quote from msjosephI have no idea what step it was. Is it a prominent lump or just like raised skin??

Quote from Bird2The first time you are given a TB test it is a 2 step. There after you receive a 1 step every year( this is called a booster). Basically the test is given and read 48-72 hours later. In a 2 step it is given again one week later and also read 48-72 hours later. When a TB test is read it is easy for the better to not look at the arm but just feel it. Your eyes can play tricks making think you feel a lump. Sometimes the indutation is very obvious other times it is barely there. If someone is a positive reactor they usually will not get another TB test but an employer will fill out a positve reactor form yearly and as needed to monitor for signs and symptoms of TB.