与食物相关的因素影响了菌体在减少Campylobacter jejuni数量的有效性
Sebastian Henz1, Ramona Nitzsche1, Lena Stukenborg1
1DIL German Institute for Food Technologies, Professor-von-Klitzing-Str. 7, 49610, Quakenbrueck, Germany.
Food microbiology
|October 24, 2025
概括
由于储存条件,菌体在生肉上对Campylobacter jejuni的有效性降低. 优化菌体应用需要了解这些对环境影响的Campylobacter去污染.
科学领域:
- 食品微生物学 食品微生物学
- 细菌治疗是一种细菌治疗.
- 食品安全 食品安全
背景情况:
- 坎比洛巴克特 (Campylobacter jejuni) 是一种主要的食源性病原体,与肉消费有关.
- 菌体为化学消毒提供了一个生物替代方案,保护食品的质量.
- 菌体的有效性往往取决于宿主的生长条件,这些条件在食物矩阵中可能有所不同.
研究的目的:
- 在模仿存储生肉的条件下,评估坎皮洛巴克特特异性菌体 (B14) 的抗菌疗效.
- 在模拟肉类条件与最佳细菌生长条件的模型系统中比较菌体性能.
- 了解环境因素如何影响菌体与宿主相互作用,以改善食品安全应用.
主要方法:
- 开发了一个使用穆勒-亨顿的液体模型系统.
- 调整了pH,大气,温度和肉汁度等关键参数.
- 对Campylobacter jejuni PT14生长和菌体B14抗菌活性的影响使用细菌计数的逻辑比率来量化.
主要成果:
- 当条件偏离了最佳的C. jejuni生长 (pH7-9,微空气,42°C) 时,菌体B14的疗效显著降低.
- 与生肉储存相关的环境因素对C. jejuni.的菌体失活产生了负面影响.
- 观察到的有效性降低不能仅仅通过对细菌生长的影响来解释.
结论:
- 生肉的储存条件不利于通过菌体B14进行有效的Campylobacter jejuni无活化.
- 在食品存储条件下了解菌体与宿主相互作用对于优化基于菌体的脱污战略至关重要.
- 这项研究支持在家禽生产中开发有效的菌体应用概念,以提高食品安全.
相关概念视频
00:43Lysogenic Cycle of Bacteriophages
67.3K
In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
67.3K
01:30Lytic Cycle of Bacteriophages
77.4K
Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
77.4K
01:28Biological Methods for Microbial Control
778
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
778
01:16Viral Replication: Lysogenic Cycle
1.3K
The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
1.3K
01:28Antimicrobial Effectiveness
898
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
898