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Iconographies supplémentaires de l'article : Factors involved in the aerosol transmission of infection and control of ventilation in healthcare premises
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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.
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Violent expiratory events: on coughing and sneezing
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Recognition of aerosol transmission of infectious agents: a commentary
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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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DissertationDOI
Development of a mobile air filter testing laboratory and filter assessment procedure for pig production systems
Abstract: The current filter testing standards for filter efficiency and resistance are based on the operational conditions for use in conventional heating, ventilation, and air conditioning (HVAC) systems, while the application of filters in swine buildings have unique conditions in comparison. While testing filters for swine buildings these differences create both technical and economic burdens that could hinder proper testing. Thus, addressing such issues must be accomplished for effective filter testing programs specific to swine building applications. The major technical issue is the difference of rated filter airflow and resistance. HVAC applications are rated for much higher airflow and resistance conditions, while swine applications are lower due to equipment restrictions. While testing for filter resistance in swine applications, using a standard test duct, the uncertainty for the lower airflow is significantly higher than compared to the rated airflow uncertainty. The economic burden is due to the large number of filters needed for typical building sizes, requiring a larger representative sample for testing. To address these issues, a mobile air filter testing laboratory (MAFT), was developed for swine building applications. The airflow range is much lower than that of a standard test duct and only meant for filter resistance testing. The test duct was calibrated and validated with an ASHRAE 52.2 certified laboratory. The deployment of MAFT to a swine site allows for filters to be removed from the system, tested, then re-installed into the system reducing the overall cost of filter testing by eliminating the expense of filter replacement. Through a field study of commercial sow farms, the key factors impacting airflow reduction rates are related to the site layout and filter types. A field study comparing two pre-filtering materials (3-D vinyl screen and a fiberglass media) was
DissertationDOI
Quantitative studies on airborne transmission of porcine reproductive and respiratory syndrome virus
TL;DR: A sampling system for the recovery and detection of airborne porcine reproductive and respiratory syndrome virus and swine influenza virus and improved dose-response estimates for airborne pathogens in animals is optimization.
ReportDOI
Challenge of N95 and P100 Filtering Facepiece Respirators with Particles Containing Viable H1N1
TL;DR: In this paper, 3M1860s (N95) and 3M 8293 (P100) NIOSH-approved filtering facepiece respirators (FFRs) were challenged with aerosolized particles of H1N1 influenza to measure the amount of viable influenza virus that penetrates each device.
Journal ArticleDOI
Relationship between Self-Reported Vaccination History and Measles and Rubella Antibody Titers in Medical and Nursing Students
TL;DR: Self-reported history may be useful to confirm immunity, even if there is a possibility that the history is not accurate, and the positive ratio between the two-dose and one-dose vaccination groups was not significantly different for measles or rubella.
The 7th World Congress on Particle Technology (WCPT7) Numerical modeling of bacterium-surface interaction by applying DEM
TL;DR: In this paper, the simulation of the S. aureus bacterium-surface interactions in a framework of the discrete element method (DEM) is addressed, where the suspension forming bacteria may be considered as system of living active ultrafine particles (size 1 μm).