通过表面传播SARS-CoV-2的社区传播:风险和风险降低策略
Ana K Pitol1, Timothy R Julian2,3,4
1Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom.
概括
污染的表面对SARS-CoV-2传播的风险很低. 手部消毒显著降低了感染风险,而表面消毒的有效性则因疾病的流行率和接触频率而异.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 公共卫生 公共卫生
背景情况:
- 由SARS-CoV-2引起的COVID-19大流行,主要被认为是通过呼吸道液滴传播.
- 污染表面在SARS-CoV-2传播中的作用仍然是争论的主题.
- 了解传播途径对于有效的公共卫生干预至关重要.
研究的目的:
- 通过受污染的表面量化SARS-CoV-2传播的风险.
- 评估手和表面消毒策略的有效性.
- 为公众提供有关预防COVID-19的公共卫生指南.
主要方法:
- 使用了定量微生物风险评估 (QMRA) 框架.
- 模拟的SARS-CoV-2传染风险来自手对面和手对面接触.
- 评估了不同患病率和消毒干预措施的影响.
主要成果:
- 在0.2% - 5%的流行率下,通过表面传播的计算低中位风险 (1.6 × 10-4至5.6 × 10-9).
- 观察到的感染风险低于10-6%,流行率为0.2%和1%.
- 手部消毒在不同的流行和接触场景中被证明是非常有效的.
结论:
- 污染的表面不太可能是SARS-CoV-2社区传播的主要驱动因素.
- 手部消毒是减少传播风险的一种始终有效的干预措施.
- 表面消毒的有效性取决于疾病的流行率和接触频率,这表明其作用是次要的.
相关概念视频
Transmission-based Precautions I: Contact, Enteric, and Droplets
3.7K
Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
3.7K
Transmission-based Precautions II: Airborne and Protective Environment
1.3K
Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
1.3K
Healthcare Associated Infections II: Preventive Measures
2.7K
Essential infection prevention measures are based on the knowledge of the infection chain, the modes of transmission in healthcare settings, and the use of the best practices in all healthcare settings. Compulsory public reporting of healthcare-associated infection rates is needed to allow individuals and the community to make informed choices regarding selecting a healthcare facility.
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
2.7K
Standard Precaution
2.0K
Standard precautions are the minimum infection control safeguards used while caring for all patients, irrespective of their disease condition. They help prevent the spread of common infectious microorganisms to healthcare workers, patients, and visitors in all healthcare settings.
Hand hygiene is the most crucial means to prevent the transmission of disease. Employers are legally required to provide their workers with personal protective equipment (PPE) to minimize exposure or contact with...
Hand hygiene is the most crucial means to prevent the transmission of disease. Employers are legally required to provide their workers with personal protective equipment (PPE) to minimize exposure or contact with...
2.0K
Infection
8.1K
When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
8.1K
Hand hygiene
3.4K
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...
3.4K


