在新鲜农产品环境中,从野生鸟类中分离出来的沙门氏菌的流行率和分子特征
Jared C Smith1, Sofia Varriano2, Kerrie Roach3
1Departments of Population Health and Microbiology, University of Georgia, Athens, GA, United States.
Frontiers in microbiology
|November 29, 2023
概括
野生鸟类便可以携带沙门氏菌,一种通过食物传播的病原体. 这项研究发现沙门氏菌的流行率很低,特别是在干便中,没有证据表明作物受到污染. 鸟类可能从常见来源获得沙门氏菌.
科学领域:
- 食品安全与微生物学
- 野生动物生态学和疾病传播传播
- 农业科学 农业科学
背景情况:
- 野生鸟类是农业中的潜在食品安全风险,原因是农作物的便污染.
- 传统的野生动物减灾策略往往对鸟类无效.
- 了解鸟类的行为和病原体的分泌对于风险评估至关重要.
研究的目的:
- 评估美国东南部野生鸟类便所带来的食品安全风险.
- 为了确定野生鸟类便样本中的沙门氏菌的流行率和特征.
- 调查沙门氏菌的潜在传播途径和来源.
主要方法:
- 从四个东南州的45个农场收集了773个野生鸟类便样本 (2021-2022).
- 使用基于培养的方法和聚合酶链反应 (PCR) 来检测沙门氏菌.
- 进行了16S微生物组分析,多种血清菌种群分析和孤立的全基因组测序 (WGS).
- 在农场和便样本中发现的鸟类物种.
主要成果:
- 2.1%的便样本呈沙门氏菌阳性;75%的阳性样本来自潮湿的便,表明干便的生存能力降低.
- 检测到13种沙门氏菌血清,包括6种常见的人类疾病. 62.5%的阳性样本具有多种血清菌种群.
- 没有证据表明沙门氏菌传播到近端叶子或产品. WGS建议鸟类从共同的来源获得沙门氏菌.
结论:
- 野生鸟类便污染造成沙门氏菌产生风险较低,特别是当便被干燥时.
- 在干燥的便中,沙门氏菌的生存能力显著降低.
- 对农业环境中野生鸟类常见的沙门氏菌来源进行进一步的研究是有必要的.
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