对Aeromonas hydrophila生物膜的有针对性的洞察:表面偏好,抵抗机制和基因表达
Md Ashikur Rahman1, Shirin Akter2, Md Ashrafudoulla3
1Food Safety and Regulatory Science, Chung-Ang University, Anseong-Si, Republic of Korea; GreenTech-based Food Safety Research Group, BK21 Four, Chung-Ang University, 4726 Seodong-daero, Anseong, Gyeonggido 17546, Republic of Korea; Bangladesh Fisheries Research Institute, Mymensingh 2201, Bangladesh.
Poultry science
|March 5, 2025
概括
这项研究分析了Aeromonas hydrophila生物膜在各种表面上,发现聚乙烯二甲 (PET) 促进生物膜生长,而高密度聚乙烯 (HDPE) 则抵抗它. 菌株特定的特征影响生物膜形成和抗生素耐药性.
科学领域:
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
- 食品安全 食品安全
背景情况:
- 气球菌 (Aeromonas hydrophila) 是一种重要的食物传播病原体.
- 食品接触表面的生物膜形成对食品安全构成挑战.
- 了解菌株特异性行为和表面相互作用对于控制至关重要.
研究的目的:
- 综合分析Aeromonas hydrophila菌株的生物膜形成,抗生素耐药性,运动性和基因表达.
- 评估不同材料表面 (不钢,,PET,HDPE) 对生物膜发展的影响.
- 为了将遗传因素与观察到的表型特征相关联,用于针对性的生物膜控制策略.
主要方法:
- 在96小时内,在四个不同的材料表面上化了四种Aeromonas hydrophila菌株.
- 使用殖民地形成单位 (CFU/cm2) 量化生物膜形成.
- 抗生素易感性测试,运动性测试 (游泳和蜂群) 和遗传分析 (特定基因的PCR).
- 对焦显微镜和扫描电子显微镜 (SEM) 用于生物膜架构和成熟分析.
主要成果:
- 生物膜形成在72小时达到峰值,ATCC 7966在PET上显示出最高密度.
- HDPE显示出最低的生物膜水平,表明了耐药性.
- 在ATCC 15467和KCTC 11533.3菌株中观察到多种药物耐药性 (MDR).
- 菌株KCTC 11533表现出最高的游泳机动性,KCTC 2358表现出最高的游泳机动性.
- 基因csgA仅在ATCC 7966中发现,与其强烈的生物膜形成有关.
结论:
- 表面特性显著影响了Aeromonas hydrophila生物膜的形成,PET有利于PET,而HDPE则抑制了它.
- 菌株特定的基因构成和运动性有助于差异化生物膜发育和抗生素耐药性.
- 这些发现为制定有针对性的策略提供了基础,以减轻食品加工环境中的Aeromonas hydrophila生物膜.
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