Oxford Immunotec must be in need of good PR,
here they milk this study for what it's worth
278 individuals categorized as being low risk for TB infection were tested, only 3 were positive for TB according to the T-SPOT.TB test.
But that is not what the November 2009
abstract says
Of 326 subjects, 8 (2.5%) had a positive T-SPOT.TB result, six of which occurred in the absence of a positive TST.
It is possible that of the 326 only 278 were judged
as being low risk for TB infection; it will be interesting to read the full study, when it comes through.