Monocyte Signal Transduction Receptors in Active and Latent Tuberculosis

Table 4

The production of IFN-γ in response to M.tb specific antigens.

Groups	IFN-γ (IU/mL)
	Responders/group (%)	Range	Mean ± SD*	P value**
TB	38/43 (88%)	0–12.1	2.07±3.25	<0.001
NMLD	32/46 (69%)	0–13.9	0.95±2.96	0.4
Household TB contacts	24/41 (58%)	0–12.0	1.39±3.23	0.29
Work TB contacts	41/48 (85%)	0–12.7	0.99±2.01	<0.001
Controls	20/46 (43%)	0–12.0	0.33±1.76

∗Mean ± SD values of cytokine in whole bood cultures stimulated with M.tb antigens (TB Ag-Nil); ∗∗significance value between the responses in controls and each group of participants.