Table 6.

Gene expression in the ileal tissues of 42-day-old turkeys fed diets with different arginine (Arg) to lysine (Lys) ratios and a high methionine (Met) level, challenged withClostridium perfringens—(Experiment 2).

Item	ZO-1	Occludin	GLP2	OGG1	TFF2
Arg90*Infection (−)	0.794	0.005	0.375	0.184	0.003
Arg90*Infection (+)	1.918	0.022	1.145	0.666	0.011
Arg100*Infection (−)	0.841	0.006	0.385	0.172	0.003
Arg100*Infection (+)	2.485	0.014	1.590	0.545	0.009
Arg110*Infection (−)	0.838	0.005	0.368	0.283	0.003
Arg110*Infection (+)	2.253	0.014	1.219	0.616	0.007
SEM	0.120	0.001	0.091	0.044	0.0007
Arg level,  %
90	1.356	0.013	0.760	0.425	0.007
100	1.663	0.010	0.987	0.359	0.006
110	1.545	0.009	0.793	0.450	0.005
C. perfringens infection1
–	0.824b	0.005b	0.376b	0.213b	0.003b
+	2.219a	0.017a	1.318a	0.609a	0.009a
P value
Arg	0.134	0.144	0.259	0.532	0.421
infection	0.001	0.001	0.001	0.001	0.001
Arg × infection	0.237	0.078	0.301	0.654	0.283

Diets contained three levels of Arg relative to Lys (90, 100 and 110%; Arg₉₀, Arg₁₀₀ and Arg₁₁₀, respectively) and a high level of Met (45% dietary Lys).

¹At 34, 36 and 37 days of age, birds were infected with 1 mL (per os directly into the crop) of a culture medium of C. perfringens type A strain 56 containing approximately 10⁸ CFU/mL of bacteria. ^a,bMeans within a row with different superscripts differ significantly (P < 0.05).