Maintenance of Sensitivity of the T-SPOT.TB Assay after Overnight Storage of Blood Samples, Dar es Salaam, Tanzania

Table 1

Overall agreement between TB culture and T-SPOT.TB.

		T-SPOT.TB
		Positive	Negative	Invalid
Culture	Positive	60	2	1*
	Negative	1	2	0

*1/66 (1.5%) of T-SPOT.TB results was invalid due to a high nil control result.