A5081934092- Infection Control and Ventilation
- Indoor Air Quality and Microbial Exposure
- COVID-19 epidemiological studies
- Atmospheric chemistry and aerosols
- SARS-CoV-2 detection and testing
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- COVID-19 and healthcare impacts
- Noise Effects and Management
- COVID-19 impact on air quality
- Viral gastroenteritis research and epidemiology
- Gene expression and cancer classification
- SARS-CoV-2 and COVID-19 Research
- Climate Change and Health Impacts
- Data Analysis with R
- COVID-19 diagnosis using AI
- Adrenal Hormones and Disorders
- Immune Response and Inflammation
- Cystic Fibrosis Research Advances
- Bacterial biofilms and quorum sensing
- Allergic Rhinitis and Sensitization
- Wind and Air Flow Studies
- Atmospheric aerosols and clouds
- Plant-Microbe Interactions and Immunity
- Plant Pathogenic Bacteria Studies
Lund University
2017-2025
Design Science (United Kingdom)
2019-2024
Choir singing has been suspended in many countries during the Covid-19 pandemic due to incidental reports of disease transmission (Hamner et al. 2020). The mode attributed ...
Abstract Studying how single nucleotide polymorphisms (SNPs) crosstalk with non-autologous factors to cause complex autoimmune diseases is challenging. An amino acid replacement in the neutrophil cytosolic factor 1 ( NCF1 -339/ R90H ) leading lower reactive oxygen species induction has been reported as major SNP for systemic lupus erythematosus (SLE). Here we show that infection murine norovirus (MNV) contributes of Ncf1 90H mice. Mutant upregulates IFN-α/JAK1/STAT1 pathway macrophages and...
To evaluate three types of ventilation systems for operating rooms with respect to air cleanliness [in colony-forming units (cfu/m3)], energy consumption and comfort working environment (noise draught) as reported by surgical team members.Two commonly used systems, vertical laminar airflow (LAF) turbulent mixed (TMA), were compared a newly developed technique, temperature-controlled (TcAF). The cfu concentrations measured at locations in an room during 45 orthopaedic procedures: close the...
Abstract Background Noroviruses are the major cause of viral gastroenteritis. Disease transmission is difficult to prevent and outbreaks in health-care facilities commonly occur. Contact with infected persons contaminated environments believed be main routes transmission. However, noroviruses have recently been found aerosols airborne has suggested. The aim our study was investigate associations between symptoms gastroenteritis presence norovirus, size norovirus-carrying particles. Methods...
Experimental aerosol generation methods aim to represent natural processes; however, the complexity is not always captured and unforeseen variability may be introduced into data. The current practices for experimental techniques are reviewed here. Recommendations best practice presented, include characterization of starting material spray fluid, rational selection appropriate generators, physical biological output aerosol. Reporting bioaerosol research should capture sufficient detail aid...
SARS-CoV-2 in exhaled aerosols is considered an important contributor to the spread of COVID-19. However, characterizing size distribution virus-containing aerosol particles has been challenging as high concentrations air mainly present close symptom onset. We a case study person with COVID-19 who was able participate extensive measurements already on day onset and then for following three days.Aerosol collection performed using eight-stage impactor while subject breathing, talking singing,...
Transmission of coronavirus disease 2019 (COVID-19) can occur through inhalation fine droplets or aerosols containing infectious virus. The objective this study was to identify situations, patient characteristics, environmental parameters, and aerosol-generating procedures (AGPs) associated with airborne severe acute respiratory syndrome 2 (SARS-CoV-2)
Coronavirus disease 2019 (COVID-19) transmission via exhaled aerosol particles has been considered an important route for the spread of infection, especially during super-spreading events involving loud talking or singing. However, no study previously linked measurements viral emissions to rates.During February-March 2021, COVID-19 cases that were close symptom onset visited with a mobile laboratory collection breathing, talking, and singing, respectively, nasopharyngeal saliva samples....
Transmissibility has increased during the evolution of SARS-CoV-2, possibly by improved airborne transmission. An transmission was noted also in many hospitals. We analyzed SARS-CoV-2 room air hospitalized Omicron infected patients and compared results with previous findings pre-Delta variants to study if more prevalent patient rooms after introduction Omicron. Only 4 75 (5%) samples, from 3 43 included patients, were positive early wave, 14/120 (12%), 10 60 initial wave. No certain...
The Arctic is particularly vulnerable to climate change due a decrease in surface albedo caused by declining ice and snow cover. Aerosol-cloud feedbacks modulate warming, with clouds profoundly affecting the radiative balance of region through both cooling warming effects. concentration type ice-nucleating particles (INP) are key factors controlling cloud formation which directly influences properties lifetime. It has recently been proposed that microbially-produced INPs, come from marine...
Airborne dispersal of microorganisms influences their biogeography, gene flow, atmospheric processes, human health and transmission pathogens that affect humans, plants animals. The extent impact depends essentially on cell-survival rates during the process aerosolization. A central factor for is water availability prior to upon Also, ability cells successfully cope with stress induced by drying determines chances survival. In this study, we used ice-nucleation active, plant pathogenic...
Transmission of respiratory viruses is a complex process involving emission, deposition in the airways, and infection. Inhalation often most relevant transmission mode indoor environments. For severe acute syndrome coronavirus 2 (SARS-CoV-2), risk inhalation not yet fully understood. Here, we used an aerosol model combined with regional inhaled deposited dose to examine transport aerosols from infected person novel disease (COVID-19) susceptible assess potential rate particles. Two scenarios...
Abstract. Biological aerosol particles affect human health, are essential for microbial and gene dispersal, have been proposed as important agents atmospheric processes. However, the abundance size distributions of biological largely unknown. In this study we used a laser-induced fluorescence instrument to measure fluorescent particle (FBAP) concentrations 18 months (October 2020–April 2022) at rural, forested site in Sweden. The aim was investigate FBAP number (NFBAP) over time analyze...
Exhaled SARS-CoV-2-containing aerosols contributed significantly to the rapid and vast spread of covid-19. However, quantitative experimental data on infectivity such is missing. Here, we quantified emission rates infectious viruses in exhaled aerosol from individuals within their first days after symptom onset Six samples three were culturable, which five successfully using TCID50. The source strength was highest during singing, when they 4, 36, or 127 TCID50/s, respectively. Calculations...
Abstract Noroviruses are the major cause for viral acute gastroenteritis in world. Despite existing infection prevention strategies hospitals, disease continues to spread and causes extensive numerous outbreaks. Hence, there is a need investigate possibility of airborne transmission norovirus. In this study, we developed an experimental setup studies on infectivity aerosolized murine norovirus (MNV), model human Two aerosol generation principles were evaluated: bubble bursting, common...
Background . Airborne SARS‐CoV‐2 plays a prominent role in COVID‐19 transmission. Numerous studies have sampled air from patient rooms, but airborne spread to other hospital areas such as corridors is less investigated. Methods Size‐fractionated aerosol particles were collected weekly, with 12 hours of sampling time daily, at two infectious disease wards southern Sweden between March 2020 and May 2021. Samples analysed real‐time reverse transcription polymerase chain reaction (RT‐qPCR) for...
Healthcare workers in obstetric clinics may be exposed to airborne SARS-CoV-2 when treating patients with COVID-19.
Clouds have one of the most profound effects on Earth’s climate, yet they are still responsible for some biggest uncertainties in climate models. Cloud formation, radiative properties, thickness and lifetime tightly interlinked with presence atmospheric particles (aerosols) formation ice. Biological aerosols (bioaerosols) such as ice-nucleation proteins (INpro) produced by microorganisms efficient catalysts ice can trigger heterogenous freezing between -1°C -15°C....