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. 2020 Aug 26;99(11):5844–5857. doi: 10.1016/j.psj.2020.08.017

Table 5.

Villi height (V, mm), crypts depth (C, mm), and villi: crypt ratio (V:C) in the duodenum, jejunum, and ileum at 6 d postinoculation (dpi) according to dietary Arg levels (1.04, 1.14, 1.24, 1.34, and 1.44%) in broilers challenged (Cha) or unchallenged (Unch) with a mixed Eimeria spp. infection.

Challenge Arg Duodenum
 Jejunum
 Ileum
V C V:C V C V:C V C V:C
Cha 1.04 1.96 0.22 8.94 1.06 0.23a,b,c 4.80 0.88 0.27 3.24
1.14 1.82 0.21 8.65 1.22 0.28a,b 4.38 0.91 0.27 3.70
1.24 2.03 0.24 9.23 1.21 0.31a 3.92 0.83 0.24 3.59
1.34 2.26 0.26 9.09 1.17 0.26a,b,c 4.54 1.02 0.28 3.77
1.44 2.04 0.29 7.13 1.15 0.23b,c 5.05 0.90 0.29 3.29
Unch 1.04 2.24 0.22 10.57 1.13 0.22b,c 5.19 0.82 0.17 4.79
1.14 2.32 0.23 10.42 1.18 0.23a,b,c 5.23 0.66 0.14 4.69
1.24 2.27 0.23 9.80 1.23 0.20c 6.33 0.74 0.16 4.80
1.34 2.52 0.24 10.86 1.31 0.23b,c 5.83 0.86 0.18 4.89
1.44 2.37 0.22 10.92 1.30 0.22b,c 5.87 0.80 0.16 5.70
Challenge Cha 2.02b 0.24 8.61b 1.16 0.26 4.54b 0.91a 0.27a 3.52b
Unch 2.34a 0.23 10.52a 1.23 0.22 5.69a 0.77b 0.16b 4.97a
Arg 1.04 2.10 0.22 9.76 1.09 0.23 4.99 0.85 0.22 4.03
1.14 2.07 0.22 9.54 1.20 0.26 4.80 0.78 0.21 4.20
1.24 2.15 0.24 9.52 1.22 0.25 5.13 0.79 0.20 4.19
1.34 2.39 0.25 9.98 1.12 0.24 5.18 0.94 0.23 4.33
1.44 2.20 0.25 9.03 1.22 0.22 5.46 0.85 0.22 4.49



SEM Challenge 0.074 0.013 0.565 0.061 0.011 0.293 0.041 0.015 0.348
Arg 0.046 0.007 0.326 0.035 0.006 0.169 0.023 0.008 0.201
Interaction 0.033 0.005 0.230 0.025 0.004 0.120 0.016 0.006 0.142



P-value Challenge <0.001 0.204 <0.001 0.230 <0.001 <0.001 0.001 <0.001 <0.001
Arg 0.074 0.404 0.840 0.503 0.202 0.699 0.077 0.663 0.923
L1 0.049 0.055 0.593 0.164 0.662 0.217 0.256 0.637 0.361
Q1 0.591 0.922 0.657 0.310 0.023 0.585 0.550 0.365 0.939
Interaction 0.791 0.252 0.398 0.826 0.027 0.193 0.558 0.814 0.688
L × Unch2 0.194 0.918 0.648 0.123 0.994 0.184 0.402 0.862 0.223
L × Cha2 0.135 0.014 0.266 0.672 0.548 0.663 0.438 0.626 0.926
Q × Unch3 0.687 0.382 0.480 0.754 0.737 0.342 0.318 0.794 0.361
Q × Cha3 0.719 0.352 0.215 0.264 0.001 0.101 0.888 0.312 0.434
1

L, Linear effect; Q, Quadratic effect.

2

L at Unch—Linear effect of Arg on unchallenged birds; L at Cha–Linear effect of Arg on challenged birds.

3

Q at Unch—Quadratic effect of Arg on unchallenged birds; Q at Cha–Quadratic effect of Arg on challenged birds.