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Iconographies supplémentaires de l'article : Factors involved in the aerosol transmission of infection and control of ventilation in healthcare premises
TLDR
Recommendations are made to improve the control of aerosol-transmitted infections in hospitals as well as in the design and construction of future isolation facilities.Abstract:
Summary
The epidemics of severe acute respiratory syndrome (SARS) in 2003 highlighted both short- and long-range transmission routes, i.e. between infected patients and healthcare workers, and between distant locations. With other infections such as tuberculosis, measles and chickenpox, the concept of aerosol transmission is so well accepted that isolation of such patients is the norm. With current concerns about a possible approaching influenza pandemic, the control of transmission via infectious air has become more important. Therefore, the aim of this review is to describe the factors involved in: (1) the generation of an infectious aerosol, (2) the transmission of infectious droplets or droplet nuclei from this aerosol, and (3) the potential for inhalation of such droplets or droplet nuclei by a susceptible host. On this basis, recommendations are made to improve the control of aerosol-transmitted infections in hospitals as well as in the design and construction of future isolation facilities.
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Citations
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A Review of the Research Literature on Evidence-Based Healthcare Design
Roger S. Ulrich,Craig Zimring,Xuemei Zhu,Jennifer R. DuBose,Hyun-Bo Seo,Young-Seon Choi,Xiaobo Quan,Anjali Joseph +7 more
TL;DR: This review found a growing body of rigorous studies to guide healthcare design, especially with respect to reducing the frequency of hospital-acquired infections and the state of knowledge of evidence-based healthcare design has grown rapidly in recent years.
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Transmission of COVID-19 virus by droplets and aerosols: A critical review on the unresolved dichotomy.
TL;DR: It is demonstrated that the nosocomial transmission by airborne SARS-CoV-2 viral-laden aerosols in healthcare facilities may be plausible and clearly defined, science-based administrative, clinical, and physical measures are of paramount importance to eradicate the COVID-19 pandemic from the world.
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Violent expiratory events: on coughing and sneezing
TL;DR: In this paper, the authors present the results of a combined experimental and theoretical investigation of the fluid dynamics of such violent expiratory events, which reveals that such flows are multiphase turbulent buoyant clouds with suspended droplets of various sizes.
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Recognition of aerosol transmission of infectious agents: a commentary
TL;DR: This review considers the commonly used term of ‘aerosol transmission’ in the context of some infectious agents that are well-recognized to be transmissible via the airborne route, and discusses other agents, like influenza virus, where the potential for airborne transmission is much more dependent on various host, viral and environmental factors, and where its potential for aerosol transmission may be underestimated.
The fluid mechanics of natural ventilation
TL;DR: In this paper, two forms of ventilation are discussed: mixing ventilation and displacement ventilation, where the interior is at an approximately uniform temperature and there is strong internal stratification, respectively, and the effects of wind on them are examined.
References
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Soon-Bark Kwon,Jaehyung Park,Jaeyoun Jang,Youngmin Cho,Duck Shin Park,Changsoo Kim,Gwi-Nam Bae,Am Jang +7 more
TL;DR: The objective of this study was to analyze the initial velocity and the angle of the exhaled airflow from coughing and speaking of 17 males and 9 females using Particle Image Velocimetry (PIV) and acrylic indoor chamber and the linear relation between the tested subject’s height and their coughing andSpeaking velocity was shown.
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TL;DR: In contrast to previously published reports, sustained infectivity of aerosolized influenza viruses in respiratory mucus over a wide-range of relative humidity conditions is detected, indicating a risk of airborne transmission in a broad range of environments.