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Salmonella prevalence in market-age turkeys on-farm and at slaughter

机译：在农场和屠宰场的火鸡中沙门氏菌流行

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The objective of this study was to compare the prevalence of Salmonella in market-age turkeys on-farm and at slaughter (i.e., before and after feed withdrawal, catching, loading, transportation, and preslaughter holding). Thirty birds were randomly selected from each of 6 commercial turkey flocks scheduled to be loaded and shipped to the abattoir during the evening of the same day. Selected birds were euthanized on the farm, and the cloacal contents, large intestine, crop, ceca, liver and gallbladder, and spleen were aseptically collected. At the abattoir, 30 birds from the same flock were randomly selected from the slaughter line, and the crop, ceca, liver and gallbladder, and spleen were collected for subsequent culture at the laboratory. All flocks studied were positive for Salmonella at slaughter. No statistical difference was found between the overall prevalence on-farm and at slaughter. At both sampling points, the overall prevalence found was 33.3%. Diverging prevalence estimates were obtained based on the different sample types collected on-farm and at slaughter. In both cases, cecal content samples had the highest relative sensitivity (73.3% on-farm and 68.3% at slaughter). This study demonstrates that the preslaughter practices of feed withdrawal, catching, loading, transportation, and holding do not significantly alter the prevalence of Salmonella in market-age turkeys. Therefore, our results suggest that it may be possible to monitor the Salmonella status of turkey production farms based on samples collected at the abattoir.
机译：这项研究的目的是比较沙门氏菌在市场上的火鸡农场和屠宰场（即在饲料撤回，捕捞，装载，运输和屠宰前保存前后）的流行情况。从计划在同一天晚上装载并运送到屠宰场的6只商业火鸡群中，随机选择30只鸡。在农场对选定的鸟类实施安乐死，并无菌收集泄殖腔内容物，大肠，作物，盲肠，肝胆和脾脏。在屠宰场，从屠宰场中随机选出30只相同禽群的禽鸟，并收集农作物，盲肠，肝脏，胆囊和脾脏，以便随后在实验室进行培养。研究的所有鸡群在屠宰后沙门氏菌均呈阳性。在农场和屠宰场的总体流行率之间未发现统计学差异。在两个采样点，发现的总体患病率为33.3％。根据在农场和屠宰场收集的不同样本类型获得不同的患病率估计值。在这两种情况下，盲肠含量样品的相对灵敏度最高（农场中为73.3％，屠宰时为68.3％）。这项研究表明，饲料撤回，捕捞，装载，运输和保管的屠宰前操作不会显着改变适龄火鸡中沙门氏菌的流行。因此，我们的结果表明，有可能基于在屠宰场收集的样本来监测火鸡生产农场的沙门氏菌状况。

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