The immune response of young turkeys to haemorrhagic enteritis virus infection at different levels and sources of methionine in the diet

Table 2 Percentages of T cell and B cell subpopulations in the spleen in turkeys administered feeds with different Met sources and content (n = 7)

	CD4⁺	CD4⁺CD25⁺	CD8⁺	CD4⁺CD8⁺	IgM⁺
Group¹
0-DLM_L	33.3	1.55	37.9	2.00	18.2
0-MHA_L	35.3	1.65	33.5	2.46	18.6
0-DLM_H	33.1	1.73	36.4	2.12	20.8
0-MHA_H	29.3	1.75	37.3	2.15	21.8
HE-DLM_L	51.4	1.67	25.0	1.88	15.8
HE-MHA_L	55.9	1.61	24.7	2.09	14.9
HE-DLM_H	53.8	1.83	19.1	2.24	16.7
HE-MHA_H	50.4	1.76	21.4	2.12	14.7
Infection
0	32.73	1.669	36.28	2.184	19.72
HE	52.85	1.716	22.56	2.083	15.53
Met dosage
Low	43.95	1.620	30.29	2.108	16.89
High	41.63	1.765	28.55	2.159	18.36
Met source
DLM	42.89	1.694	29.60	2.063	17.89
MHA	42.70	1.691	29.24	2.204	17.36
SEM²	1.860	0.046	1.477	0.109	0.558
p – values
Infection	< 0.001	0.629	< 0.001	0.670	< 0.001
Dose	0.233	0.145	0.401	0.829	0.117
Source	0.921	0.972	0.864	0.552	0.568
Interactions	nd³	nd	nd	nd	nd

¹ Feeds administered to uninfected (0) and infected (HE) turkeys in weeks 1–4 and 5–8, contained DLM and the equivalent amount of MHA at two levels: low (_L) - 0.55, 0.45, and high (_H) - 0.78, 0.65, respectively [% as fed]
²SEM- standard error of the mean
³nd – not detected: no significant infection x dose, infection x source, dose x source or infection x dose x source interactions

ISSN: 1746-6148