TABLE 6.

CMI response in vaccinated pigs^a

Strain or group	Pigs tested	Stimulation index at day of experiment
		Day 1 (prevaccination)		Day 25 (prechallenge)		Day 52/53 (necropsy)
		SC	PHA	SC	PHA	SC	PHA
Nonvaccinated, challenged	2,3,7	0.94 ± 0.66	4.32 ± 2.06	0.97 ± 0.06	3.72 ± 0.71	3.22 ± 2.63	5.99 ± 2.24
Nonvaccinated, nonchallenged	10,13,14	1.34 ± 0.81	5.68 ± 2.84	0.93 ± 0.06	4.42 ± 0.33	2.36 ± 1.01	5.47 ± 1.93
NOBL SC-54	65,70,71	1.61 ± 1.00	6.38 ± 2.71	0.67 ± 0.49	4.65 ± 2.0	2.65 ± 1.25	4.31 ± 1.83
χ3781	34,35,36	1.49 ± 0.88	5.86 ± 2.60	0.96 ± 0.23	3.47 ± 0.47	3.32 ± 1.26	5.08 ± 1.45
χ3923	41,42,46	2.14 ± 0.42	7.78 ± 1.76	0.66 ± 0.08	3.67 ± 0.70	3.70 ± 0.96	4.12 ± 0.99
χ4186	17,22,24	0.67 ± 0.24	4.08 ± 1.19	1.06 ± 0.33	4.33 ± 1.59	3.55 ± 2.02	6.0 ± 0.44
χ4497	28,30,32	1.08 ± 1.13	3.91 ± 2.93	0.82 ± 0.14	3.67 ± 1.01	4.43 ± 1.19	5.05 ± 0.94
χ4522	57,60,62	1.41 ± 0.51	7.13 ± 4.66	1.06 ± 0.25	5.22 ± 2.80	2.55 ± 0.63	6.02 ± 1.95
χ4814	54,55,56	1.59 ± 0.35	6.70 ± 1.26	1.03 ± 0.53	4.08 ± 2.58	1.93 ± 0.72	3.47 ± 1.09
Positive control	59-9	ND	ND	1.18	5.34	4.11b	7.23

^aSC, response to S. choleraesuis antigen; PHA, response to PHA; ND, not determined. 

^bVaccinated 7 days before bleeding.