Table 6. Proliferative responses of peripheral blood lymphocytes from immunized or non-immunized turkeys to recombinant major outer membrane protein on day 18 postchallenge.

Mean stimulation index ± SD for the groups shown below (n = 5)
1	2	3	4	5	7	8	9
7·20 ± 2·84	16·0 ± 6·20	7·20 ± 2·84	17·50 ± 2·74	1·50 ± 0·35	5·80 ± 1·23	3·50 ± 0·25	2·50 ± 0·50