C-reactive protein is a test that measures the amount of a protein in the blood that signals acute inflammation.
For a perspective, C-reactive protein is produced by the liver. The level of CRP rises when there is body-wide (systemic) inflammation. The CRP test is considered a general test, not a specific one. In other words, it can reveal that there is inflammation present in the body, but it cannot tell you where it is. Unless the TB test caused an effection, there shouldn't be any systemic inflammation caused by a TB test.