Question: what is the difference between quantiferon gold and quantiferon gold plus?
Answer: tuberculosis region of difference 1 (RD1) locus, and the TB7. 7 antigen. In contrast, the new QFT-Plus IGRA contains peptides from only the ESAT-6 and CFP-10 antigens and has two TB antigen tubes (TB1 and TB2). While the QFT-Plus TB1 tube is identical to the QFT-GIT, with the exception of TB7.