相关实验视频
Updated: Feb 26, 2026
07:54
A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice
Published on: July 25, 2017
14.8K
水在冷的尸中具有抗菌活性
Carly Long1, Md Shafiul Islam Rion1, Corey Coe1
1School of Agriculture and Food System, West Virginia University, Morgantown, WV 26506, USA.
Poultry science
|February 24, 2026
概括
商业水有效地减少肉尸体上食物传播的病原体. 使用50%或75%的水进行24小时冷却,可显著控制沙门氏菌Typhimurium和Campylobacter jejuni,Enterococcus faecium也显示减少.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 肉加工 肉加工 肉加工
背景情况:
- 小型家禽生产者寻求有效的收获后加工方法.
- 水的抗菌性质对肉尸体的处理有兴趣.
- 在冷却过程中评估病原体减少对于食品安全至关重要.
研究的目的:
- 评估水在肉尸体冷却过程中对关键的食源性病原体和替代细菌的疗效.
- 在移动家禽加工单位 (MPPU) 试点设施中评估不同水度 (0%,50%,75%) 的抗菌效果.
主要方法:
- 肉尸被接种了沙门氏菌 Typhimurium,坎皮洛巴克特 jejuni 和菌 Enterococcus faecium.
- 尸体在不同度的水,或乳酸/酸混合物中冷却1或24小时.
- 细菌计数是在中和后使用选择性亚格进行的,通过混合模型程序进行统计分析.
主要成果:
- 用50%和75%的水冷却1小时,将沙门氏菌和坎皮洛巴克特菌的数量降低至2.00 log10 CFU/mL.
- 将冷却时间延长到24小时,使病原体减少到沙门氏菌的2.52 log10 CFU/mL以上,坎皮洛巴克特的2.27 log10 CFU/mL以上.
- 在MPPU研究中,Enterococcus faecium的减少较小,但在50%或75%的水中显著控制 (高达3.64 log10 CFU/mL).
结论:
- 在24小时冷却时使用50%或75%的商业水是有效的控制肉尸体上的食物传播病原体.
- 在收获后验证研究中,Enterococcus faecium可以作为沙门氏菌的可靠替代品.
- 水为小型家禽加工企业提供了可行的抗菌干预措施.
相关概念视频
01:28Antimicrobial Effectiveness
1.2K
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...
1.2K
01:27Chemical Agents for Microbial Control
1.2K
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
1.2K
01:23Hand hygiene
6.2K
Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...
Hand washing...
6.2K
01:23Physical Methods for Controlling Microbial Growth: Temperature
1.2K
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
1.2K
01:28Biological Methods for Microbial Control
968
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...
968
01:18Surface Membrane Barriers
3.1K
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...
3.1K