低剂量气态臭氧对临床相关的多重耐药细菌的杀菌效果
Bob Banerjee1, Christine Thompson2, Victor Nizet2,3
1Lumos Consulting, Lititz, PA, United States.
Frontiers in microbiology
|December 26, 2024
概括
低剂量气态臭氧有效杀死常见的医院细菌,包括多药耐药菌株. 这种自动化,无手消毒剂对于医疗保健机构来说是有前途的,减少了环境污染的挑战.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 感染控制 感染控制
背景情况:
- 医疗相关感染 (HAI) 是医院,特别是ICU的一个主要问题.
- 目前的消毒方法往往是手动的,劳动密集的,并且对抗多药耐药 (MDR) 病原体无效.
- 需要自动化,无人操作的消毒策略来打击持续的环境污染.
研究的目的:
- 评估低度气状臭氧 (5 ppm) 对临床相关细菌的杀菌效果.
- 评估不同度,接触时间,温度和环境条件对臭氧有效性的影响.
- 为了确定臭氧对抗多药耐药 (MDR) 细菌菌株的活性.
主要方法:
- 暴露各种细菌,包括MDR菌株,低剂量气状臭氧 (5ppm).
- 在不同的条件下进行测试:不同的臭氧度,接触时间,温度和湿度.
- 使用log10倍变化量化细菌减少.
主要成果:
- 对于大肠杆菌和沙门氏菌Typhimurium*,观察到3log10倍的减少.
- 观察到A组*Streptococcus*和耐美西林*Staphylococcus aureus* (MRSA) 的病例减少了1-2 log10倍.
- 臭氧表现出剂量依赖的杀菌活性,对广泛的格拉姆阳性和阴性MDR临床分离物有效,环境条件的影响最小.
结论:
- 低剂量气态臭氧是一种强效,多功能和无需手的消毒剂.
- 它显示出在医疗环境中使用的巨大潜力,以减少病原体污染.
- 需要进行进一步的研究,以制定占用空间的安全性和有效性指南,并探索协同应用.
相关概念视频
01:30Methods of Sterilization II: Chemical Methods
6.0K
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
6.0K
01:29Methods of Sterilization I: Physical Methods
19.3K
As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
19.3K
01:18Surface Membrane Barriers
661
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...
661
01:27Combined Effects of Drugs: Synergism
3.6K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
3.6K
01:31Defense Against Bacterial Pathogens
1.3K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.3K