anyone ever tested positive for tuberculosis?

I am currently in the process of going through some medical tests for various government-related applications.  So, earlier this week I received a tuberculosis test - they poke a hole in you, fill it with liquid and then wait a couple of days to see if it swells up. Well, it's swelling which seems to indicate positive (not in a positive sort of way) test results. Otherwise, I show no symptoms. My hope is such is caused by the fact that I was actually immunized against Tuberculosis when I was a child in Germany. Mother?