Table 2.

Skin reactivity to different doses of recombinant early secreted antigen target 6 (rESAT6) in the same guinea pig sensitized with live Mycobacterium tuberculosis (MTB).

			Skin reactions in guinea pigs sensitized with the live MTB (mean ± s.d. mm in diameter)
Groups	Doses	No. of animals	24 h	48 h
PBS		6	0	0
PPD	5 IU	6	10·00 ± 2·09	7·92 ± 1·77
rESAT6	0·4 μg	6	9·42 ± 1·63	7·17 ± 2·14
	0·6 μg	6	10·17 ± 2·32	7·97 ± 2·67
	0·8 μg	6	10·92 ± 3·12	8·50 ± 2·81
	1·0 μg	6	10·50 ± 2·17	7·67 ± 2·18

PBS, phosphate-buffered saline; PPD, purified protein derivative; s.d., standard deviation.