TABLE 2.

Antigen-induced IFN-γ secretion by PBMC from TB patients and BCG-vaccinated healthy subjects in response to complex mycobacterial antigens, MPB70, and RD1_pool

Organism or antigena	Value for IFN-γ secretion parameter by study group
	TB patients (n = 40)b			BCG-vaccinated healthy subjects (n = 30)b
	Median (U/ml [range])	No. of positive subjects/no. of subjects tested	% Positive	Median (U/ml [range])	No. of positive subjects/no. of subjects tested	% Positive
M. tuberculosis	34 (<0.4-316)	35/40	88	53 (<0.4-335)	28/30	93
M. tuberculosis CF	39 (<0.4-373)	36/40	90	62 (3.8-285)	29/30	97
BCG	42 (<0.4-357)	37/40	93	88 (3.9-351)	20/22	91
MPB70	4.6 (<0.4-82)	23/38	60	18 (<0.4-207)	17/24	71
RD1pool	22 (<0.4-335)	32/38	84	9.0 (<0.4-60)	18/22	82

^aCF, culture filtrate.

^bn, number of subjects.