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Chronic Salmonella Infected Mouse Model
Published on: May 31, 2010
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由Salmonella Enteritidis在两种不同年龄感染的层中的内部器官殖民化在无住房中养期间
Richard K Gast1, Deana R Jones2, Rupa Guraya2
1U. S. National Poultry Research Center, USDA Agricultural Research Service, Athens, GA 30605, richard.gast@usda.gov.
Avian diseases
|June 17, 2024
概括
在无幼中感染沙门氏菌 Enteritidis 感染在养殖后期引入时更持久. 晚期感染在商业蛋工业中构成更大的食品安全风险.
科学领域:
- 食品安全 食品安全
- 动物科学动物科学
- 微生物学 微生物学
背景情况:
- 禽类养环境对产卵群中的沙门氏菌传染有很大影响.
- 蛋行业转向无体养,引发了有关沙门氏菌持续存在的食品安全问题.
研究的目的:
- 评估 Salmonella Enteritidis 在在没有子的养环境中养的子中内部器官的殖民性.
- 为了确定感染年龄对沙门氏菌Enteritidis在幼中的持久性的影响.
主要方法:
- 在模拟的没有子的谷仓里安置了子,并在9周或15周大时感染了Salmonella Enteritidis.
- 内部器官 (肝脏,脏,肠道,卵巢) 在注射后1-2周和21-22周取样.
- 细菌学培养用于检测收集的样本中的沙门氏菌.
主要成果:
- 在两个采样时间,在15周感染的母中,与9周感染的母相比,在15周感染的母中更频繁地分离出沙门氏菌.
- 在15周感染组中,在注射后1-2周内,在肝脏,脏和肠道中观察到沙门氏菌肠杆菌的恢复率更高.
- 在15周感染的母中,在21-22周大时,在脏,卵巢和肠道中发现沙门氏菌的持续性显著增加.
结论:
- 在幼养殖 (15周) 晚些时候引入沙门氏菌感染导致幼在早期产卵阶段的持续性更大.
- 没有子的住房系统可能会影响沙门氏菌 (Salmonella Enteritidis) 的殖民和持久性动态.
- 这些发现突出了与沙门氏菌相关的潜在食品安全挑战,在过渡的无蛋生产系统中.
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