Do you have a preference between Quantiferon Gold and T-spot TB for screening in patients starting immunosuppressive agents?  

TSpot testing has better performance than Quantiferon Gold in patients with low lymphocyte levels, and/or on glucocorticoids (especially moderate to high doses). This is partially related to the way the essay is performed, and as such the Tspot is much less likely to result in an indeterminate or fa...