Virological assessment of hospitalized patients with COVID-2019

Relevance to Water Are wastewater treatment plant (WWTP) operators at risk from SARS-CoV-2 infection through exposure to human urine or faeces? Background information about SARS-CoV-2 The hormone angiotensin regulates fluid and blood pressure. In healthy humans angiotensin binds to its receptor (named angiotensin converting enzyme 2, or ACE2) which is expressed by cells that lineContinue reading “Virological assessment of hospitalized patients with COVID-2019”

Chemicals and microbes in bioaerosols from reaction tanks of six wastewater treatment plants: survival factors, generation sources, and mechanisms

Wastewater treatment commonly includes the production of air bubbles (aeration) at the bottom of activated sludge or during Dissolved Air Flocculation and Floatation. When the bubbles rise to the surface they burst, form droplets and ‘aerosolise’. This is how pathogenic microorganisms in the wastewater can become ‘airborne’.  The Experiment: Bioaerosol samples were collected from 0.1,Continue reading “Chemicals and microbes in bioaerosols from reaction tanks of six wastewater treatment plants: survival factors, generation sources, and mechanisms”

Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room

Bioaerosols are generated during wastewater treatment (eg Wang et al., 2018) and personnel working in public are also at risk of infection through inhaling aerosolised virus. This study describes the working efficacy of a N95 respirator mask (left image) or a surgical mask (right image). The Experiment: A mechanical dummy which coughed infectious influenza virusContinue reading “Detection of Infectious Influenza Virus in Cough Aerosols Generated in a Simulated Patient Examination Room”

Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask

This study gives information about surgical mask containment of particles coughed out by an infected person and is relevant to personnel who have to work amongst potentially infectious members of the public who may or may not be wearing masks. In this study a dummy of a 70kg man enclosing a mechanical lung model forContinue reading “Exhaled Air Dispersion during Coughing with and without Wearing a Surgical or N95 Mask”

Stability of SARS-CoV-2 as compared with SARS-CoV-1

This study examined the survival and infectivity of SARS-CoV-2 (COVID-19) and SARS-CoV-1 in air and on solid surfaces. A concentration in the same ballpark as the amount coughed out by an infected person was incorporated into aerosolised droplets which were either kept inside an enclosed drum for 3 hours, or were deposited onto stainless steel,Continue reading “Stability of SARS-CoV-2 as compared with SARS-CoV-1”