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Table 4 Performance of broilers 144 h post-inoculation with Eimeria spp.

From: Dietary supplementation with free methionine or methionine dipeptide mitigates intestinal oxidative stress induced by Eimeria spp. challenge in broiler chickens

   FI, kgc BWG, kgd FCRe
Mean SE Mean SE Mean SE
UCf NSh 0.470 0.011 0.295 0.009 1.593 0.016
dl-Meti 0.498 0.009 0.333 0.006 1.515 0.042
dl-MMetj 0.493 0.015 0.315 0.015 1.568 0.115
ECg NS 0.428 0.006 0.183 0.009 2.378 0.108
dl-Met 0.420 0.009 0.213 0.003 1.987 0.047
dl-MMet 0.415 0.006 0.198 0.005 2.101 0.069
Main effects
 Challenge UC 0.487a 0.007 0.314a 0.007 1.558b 0.038
EC 0.421b 0.004 0.198b 0.005 2.155a 0.064
 Diet NS 0.449 0.010 0.239b 0.022 1.985a 0.157
dl-Met 0.459 0.016 0.273a 0.023 1.751b 0.094
dl-MMet 0.454 0.016 0.256ab 0.023 1.834ab 0.118
P-value
 Challenge   < 0.0001   < 0.0001   < 0.0001
 Diet  0.6033  0.0038  0.0190
 Challenge × Diet  0.1487  0.9062  0.1155
  1. a,bMeans in the same column followed by different letters differ significantly by the Tukey test, P < 0.05. Results are presented as mean ± standard error, SE. Each cage was considered an experimental unit, n = 8. No mortality was observed during the experimental period
  2. cFI Feed intake. Performance data were calculated taking into consideration a period of 6 days, that is, the period of 144 h post-inoculation, PI with Eimeria spp.
  3. dBWG Body weight gain. Performance data were calculated taking into consideration a period of 6 days, that is, the period of 144 h post-inoculation, PI with Eimeria spp.
  4. eFCR Feed conversion ratio. Performance data were calculated taking into consideration a period of 6 days, that is, the period of 144 h post-inoculation, PI with Eimeria spp.
  5. fUC Unchallenged broilers
  6. gEC Eimeria-challenged broilers
  7. hNS non-supplemented diet
  8. idl-Met diet supplemented with free methionine, dl-methionine 99%
  9. jdl-MMet diet supplemented with methionine dipeptide, dl-methionyl-dl-methionine 95%