不同的宰前停食时间对猪盲肠发酵和粪便中沙门氏菌脱落的影响。
Different feed withdrawal times before slaughter influence caecal fermentation and faecal Salmonella shedding in pigs.
机构信息
Animal Nutrition, Management and Welfare Research Group, Departament de Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
出版信息
Vet J. 2009 Dec;182(3):469-73. doi: 10.1016/j.tvjl.2008.08.002. Epub 2008 Sep 20.
The effects of different pre-slaughter feed withdrawal times (FWT) on the gastrointestinal tract (GIT) weight and the gut environment of pigs and Salmonella shedding were investigated. Trial 1 evaluated the effects under experimental conditions (feed withdrawal for 18, 30 and 36 h) and trial 2 under commercial conditions (15 and 30 h). In trial 1, the GIT weight tended to decrease (P=0.07), the caecal pH increased (P<0.0001), short-chain fatty acids (SCFA) decreased (P<0.001) and percentage of branched-chain fatty acids (BCFA) increased as FWT increased. Similar results were observed in trial 2, but Enterobacteriaceae numbers and Salmonella positive pigs tended to increase whereas lactobacilli decreased (P<0.0005) as FWT increased. The increase in FWT involved changes in the gut microbial ecosystem that could be associated with the trend of increased caecal Enterobacteriaceae and Salmonella in faeces, and may represent a higher risk of carcass contamination in cases of laceration of viscera.
研究了不同宰前停饲时间（FWT）对猪胃肠道（GIT）重量和肠道环境以及沙门氏菌脱落的影响。试验 1 在实验条件下（停饲 18、30 和 36 小时）评估了这些影响，试验 2 在商业条件下（15 和 30 小时）进行了评估。在试验 1 中，随着 FWT 的增加，GIT 重量有下降的趋势（P=0.07），盲肠 pH 值升高（P<0.0001），短链脂肪酸（SCFA）减少（P<0.001），支链脂肪酸（BCFA）的比例增加。试验 2 也观察到了类似的结果，但随着 FWT 的增加，肠杆菌科数量和阳性猪的沙门氏菌呈上升趋势，而乳酸菌呈下降趋势（P<0.0005）。随着 FWT 的增加，肠道微生物生态系统发生了变化，这可能与粪便中盲肠肠杆菌科和沙门氏菌增加的趋势有关，并可能代表内脏破裂时胴体污染的风险更高。
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