TABLE 2.

T-cell response to bacterial antigens^a

Antigen (concn, μg/ml)	T-cell response (mean SI ± SD)
	Cord blood (n = 4)	Adult (n = 8)
GtfC (10)	NDb	3.63 ± 2.3
GtfC (20)	1.7 ± 0.38	5.25 ± 3.3
GtfD (1)	ND	3.51 ± 1.5
GtfD (10)	1.8 ± 0.4	12.51 ± 7.6c
CWP-A (20)	1.24 ± 0.09	1.20 ± 1.35d
TT (10)	1.02 ± 0.12	11.02 ± 0.23
SEB (0.01)	36.8 ± 4.12	43.5 ± 6.8

^aPositive responses in T cells from the adult group to different antigens were those with. SIs of greater than mean plus two standard deviations of the response to the same protein in the cord blood group. With irradiated PBMC only, the response was 108 ± 25 cpm. 

^bND, not determined 

^cP < 0.01 compared to the value for GtfC at 10 μg/ml by Student's t test. 

^dNo response.