Table 2 Positive results obtained with in vitro assays in group I and II

Antigen	Test	Group I no LTBI	Group II LTBI	P
CFP-10	Thymidine	1/33 (3)*	23/35 (65.7)	<0.0001
	PKH-26	1/33 (3)*	16/35 (45.7)	<0.0001
	ELISPOT	1/32 (3.1)*	18/35 (51.4)	<0.0001
ESAT-6	Thymidine	0/14 (0)	10/19 (52.6)	0.0014
ESAT-6	ELISPOT	2/14 (14.3)	16/19 (84.2)	<0.0001
CFP10 + ESAT-6	ELISPOT	3/14 (21.4)	17/19 (89.5)	<0.0001

*The 3 patients with positive results are different.
Results are expressed as number of patients (%).