相关实验视频
Updated: Jun 30, 2025

07:54
A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice
Published on: July 25, 2017
14.3K
从过去的maırma中分离出的肠球菌的基因型多样性和对抗性活动
Özlem Ertekin1, Güzin Kaban2, Mükerrem Kaya2
1Department of Nutrition and Dietetics, Faculty of Health Sciences, Munzur University, 62000 Tunceli, Turkey.
Journal of food science and technology
|March 15, 2024
概括
这项研究在土耳其pastırma中发现了肠球菌,发现一些Enterococcus faecium菌株抑制了Listeria monocytogenes的生长. 这些发现凸显了在干燥肉中使用特定的肠球菌作为生物保护剂的潜力.
科学领域:
- 食品微生物学 食品微生物学
- 细菌遗传学 细菌遗传学
- 食品安全 食品安全
背景情况:
- 肠球菌在发酵和干肉制品中很常见.
- 评估传统食品中的肠球菌的生物多样性和功能性质,如巴斯蒂尔玛,对于理解它们的作用和潜在应用至关重要.
- 控制食物传播的病原体,如Listeria monocytogenes和金黄色葡萄球菌是肉类生产的一个关键问题.
研究的目的:
- 为了研究从巴斯蒂尔马分离出来的肠球菌的基因型多样性.
- 评估这些肠球菌对关键的食源性病原体,特别是Listeria monocytogenes和Staphylococcus aureus的对抗潜力.
- 为了识别特定的肠球菌株,以作为生物保护性培养的潜在应用.
主要方法:
- 来自20家工厂的巴斯蒂尔马样品的微生物学和物理化学分析.
- 使用16S rRNA基因测序对100个肠球菌分离体的基因型鉴定.
- 使用井扩散方法对Listeria monocytogenes和Staphylococcus aureus进行对抗性活性测试.
主要成果:
- 在30-35%的样本中,肠球菌的数量超过了6 log cfu/g.
- 基因型鉴定显示的分离物主要是Enterococcus faecium (80%),其次是Enterococcus faecalis (19%) 和Enterococcus hirae (1%).
- 九种Enterococcus faecium菌株对Listeria monocytogenes表现出显著的对抗活性,但没有观察到对Staphylococcus aureus的活性.
结论:
- 菌 (Enterococcus faecium) 是过去马的占主导地位的菌物种.
- 特定的Enterococcus faecium菌株具有对Listeria monocytogenes的对抗性,这表明它们可能被用作干燥制肉制品中的天然抗菌剂或生物保护剂.
- 需要进一步的研究来描述这些有前途的Enterococcus faecium菌株,以便在食品保存中实际应用.
相关概念视频
Antibiotic Selection
53.4K
Overview
53.4K
Genomic DNA in Prokaryotes
43.9K
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
43.9K
Surface Membrane Barriers
1.1K
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
1.1K

