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

Table 1 Percentages of peripheral blood T cell and B cell subpopulations in turkeys administered feeds with different Met sources and content (n = 7)

	CD4⁺	CD4⁺CD25⁺	CD8⁺	CD4⁺CD8⁺	IgM⁺
Group¹
0-DLM_L	13.8	0.39	1.98	0.35	8.43
0-MHA_L	14.8	0.39	2.08	0.39	8.24
0-DLM_H	11.7	0.37	1.49	0.30	7.66
0-MHA_H	11.2	0.38	1.86	0.33	9.22
HE-DLM_L	29.1	0.46	2.87	0.53	5.90
HE-MHA_L	25.3	0.46	1.60	0.50	5.77
HE-DLM_H	21.6	0.42	2.24	0.51	5.67
HE-MHA_H	19.8	0.46	1.75	0.50	6.31
Infection
0	12.87	0.382	1.854	0.341	8.39
HE	23.96	0.450	2.116	0.511	5.91
Met dosage
Low	20.76	0.423	2.295	0.445	7.06
High	16.07	0.409	1.675	0.407	7.24
Met source
DLM	19.06	0.410	1.987	0.419	6.94
MHA	17.77	0.422	1.983	0.433	7.36
SEM²	1.250	0.013	0.138	0.022	0.255
p – values
Infection	< 0.001	0.011	0.333	< 0.001	< 0.001
Dose	0.009	0.581	0.027	0.319	0.572
Source	0.450	0.636	0.987	0.712	0.197
Interaction	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