절식 시간에 따른 육계의 소낭 내 Salmonella 오염도, 소화관 길이, 혈액 성분, 계육 품질에 미치는 영향

Abstract

In this study, we aimed to evaluate the impact of different feed withdrawal periods (2, 3, 4, 5, and 6 h) on <i>Salmonella</i> contamination in the crop, intestinal weight, and blood parameters of broilers before harvesting. A total of 100 broilers (initial live weight 1.906±0.06 kg) were randomly assigned to the same five treatment groups and broilers had access to water but no feed before catching. Feed withdrawal times were 2, 3, 4, 5, and 6 h prior to slaughter. Measurements included live weight, pre-slaughter weight, carcass weight, weight of gastrointestinal tract. In addition, <i>Salmonella</i> and <i>Campylobacter</i> contamination in the crop, serum biochemical profiles, counts of leukocytes, erythrocytes, and platelets, and meat quality were assessed. The results demonstrate that carcass weight, blood corticosterone, meat pH, meat color, and water holding capacity did not differ based on the feed withdrawal time. Carcass yield increased as the withdrawal time increased, but the weights of the crop, proventriculus, jejunum, ileum, and rectum were significantly reduced by 6 h (<i>P</i>&lt;0.05). <i>Salmonella</i> counts were the lowest in the crops subjected to 6 h of feed withdrawal (<i>P</i>&lt;0.05). Shear force was highest in chicken breast meat after 6 h of feed withdrawal (<i>P</i>&lt;0.05). However, when the feed was withdrawn after 6 h, the shear force increased, but it did not affect the sensory characteristics in consumers, and the <i>Salmonella</i> count also decreased and had a reduction effect on contamination during slaughter. These findings can serve as reference data for setting the feed withdrawal time.