评估从生物气消化物中分离出来的与细菌相关的细菌的表型和基因型抗生素耐药性
He Sun1, Jolanta J Levenfors2, Christian Brandt3
1Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Ecotoxicology and environmental safety
|February 13, 2025
概括
评估生物气消化剂中的抗生素耐药性需要进行遗传和细菌测试. 结合方法表明,仅依靠遗传分析可以误解耐药性水平,强调需要综合方法来准确评估风险.
科学领域:
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
- 农业科学 农业科学
背景情况:
- 生物气消化剂中的抗生素耐药性,当被用作生物肥料时,会给公共卫生带来风险.
- 目前用于评估消化剂中耐药性的方法存在局限性,包括数据库依赖性和缺乏基因表达数据.
- 准确评估消化剂中抗生素耐药性水平对于安全的农业应用至关重要.
研究的目的:
- 通过整合培养独立和培养依赖的方法,准确评估沼气消化物的抗生素耐药性.
- 为了比较从消化物中分离出来的细菌的表型和基因型抗生素耐药性概况.
- 评估消化剂中抗生素耐药性基因水平基因转移的潜力.
主要方法:
- 全基因组测序 (WGS) 用于基因型分析.
- 对细菌耐药性的表型测试 (例如,E测试).
- 从食物废弃物和动物便消化物中分离和鉴定18种抗生素耐药细菌 (ARB).
- 在多个类别中对12种抗生素的耐药性评估.
主要成果:
- 在表型和基因型抗生素耐药性评估之间观察到显著的差异.
- 大约30%的抗性水平被误解,当使用只有文化独立的方法.
- 全基因组测序表明,在孤立细菌中检测到的抗生素耐药性基因的可转移性潜力很低.
结论:
- 整合培养独立和培养依赖的方法对于可靠的生物气消化剂抗生素耐药性评估至关重要.
- 仅仅依赖遗传方法可能会导致对抗性水平和风险的不准确解释.
- 该研究通过突出方法需求和评估环境传播风险,为作为生物肥料的消化剂的安全应用提供了关键的见解.
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