Vertical and horizontal transmission of Salmonella within integrated broiler production system
Vertical and horizontal transmission of Salmonella within integrated broiler production system
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DOI：
10.1089/fpd.2005.2.90
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发表时间：
2005-03-01
影响因子：
2.8
通讯作者：
Maurer, John J.
中科院分区：
文献类型：
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作者：
Liljebjelke, Karen A.;Hofacre, Charles L.;Maurer, John J.
沙门氏菌仍然是美国食源性疾病的主要原因之一，有关动物生产系统中沙门氏菌的引入和持续存在的许多关键问题仍然存在。为了了解综合商业肉鸡生产系统中沙门氏菌的生态情况，在连续 7 个鸡群的生产和加工过程中，从两个综合家禽养殖场回收了 289 份肠沙门氏菌。不同农场之间沙门氏菌血清型的种类和流行率有所不同。总体而言，已鉴定出 15 种血清型，最常见的是鼠伤寒菌 (55%)、蒙得维的亚 (7.9%)、肯塔基州 (9%) 和肠炎菌 (9.7%)。使用脉冲场凝胶电泳 (PFGE) 对从农场一处理过的尸体中回收的鼠伤寒沙门氏菌和肠炎沙门氏菌分离株进行了进一步表征，结果表明与从该农场的禽舍环境和捕获的小鼠中回收的分离株无法区分。此外，通过 PFGE 鉴定出的相同肉鸡鼠伤寒沙门氏菌和肠炎沙门氏菌菌株也从公司种鸡场采集的样本中分离出来，表明这些沙门氏菌血清型在该家禽生产系统中存在垂直传播。结果表明，饲养者层面的管理实践可能对沙门氏菌在综合生产系统中的传播和持续存在以及家禽衍生产品的潜在污染产生深远影响。
Salmonella remains one of the leading causes of food-borne illness in the United States, and many key questions regarding the introduction and persistence in animal production systems still remain. In order to understand the ecology of Salmonella within an integrated commercial broiler production system, 289 Salmonella enterica were recovered from two integrated poultry farms during the production and processing of seven consecutive flocks. The variety and prevalence of Salmonella serotypes differed between farms. Overall, 15 serotypes were identified, with the most common being Typhimurium (55%), Montevideo (7.9%), Kentucky (9%), and Enteritidis (9.7%). Salmonella Typhimurium and Enteritidis isolates recovered from processed carcasses from Farm One were further characterized using pulsed-field gel electrophoresis (PFGE), and were shown to be indistinguishable from isolates recovered from the poultry house environment and mice trapped on this farm. Additionally, the same broiler S. Typhimurium and S. Enteritidis strains, identified by PFGE, were also isolated from samples taken at a company breeder farm, suggesting vertical transmission of these Salmonella serotypes in this poultry production system. Results indicate that management practices at the breeder level may have a profound effect on the transmission and persistence of salmonellae within an integrated production system, as well as on the potential contamination of poultry-derived products.