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Bioaerosol

About: Bioaerosol is a research topic. Over the lifetime, 1347 publications have been published within this topic receiving 34791 citations.


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TL;DR: The present study showed that the dust samples contained potentially health-impairing endotoxin-, fungi-, and actinobacteria levels, and thus have the potential to evoke an inflammatory response in exposed individuals.
Abstract: Background The global shift toward greener societies demands new technologies and work operations in the waste-management sector. However, progressive industrial methods do not necessarily consider workers’ health. This study characterized workers' exposure to bioaerosols and investigated the bioaerosols’ potential to engage the immune system in vitro. Methods Full shift personal aerosol sampling was conducted over three consecutive days. Dust load was analyzed by gravimetry, fungal and actinobacterial spores were analyzed by scanning electron microscopy, and endotoxin by limulus amebocyte lysate (LAL) assay. In vitro exposure of HEK cells to airborne dust samples was used to investigate the potential of inducing an inflammatory reaction. Results The total dust exposure level exceeded the recommended occupational exposure limit (OEL) of 5.0 mg/m3 in 3 out of 15 samples. The inhalable endotoxin level exceeded the recommended exposure level by a 7-fold, whereas the fungal spore level exceeded the recommended exposure level by an 11-fold. Actinobacterial spores were identified in 8 out of 14 samples. In vitro experiments revealed significant TLR2 activation in 9 out of 14 samples vs. significant TLR4 activation in all samples. Conclusion The present study showed that the dust samples contained potentially health-impairing endotoxin, fungi, and actinobacterial levels. Furthermore, the sampled dust contained microbial components capable of inducing TLR activation and thus have the potential to evoke an inflammatory response in exposed individuals.

6 citations

Journal ArticleDOI
TL;DR: Comparison analyzes of the size distributions of bacteria and fungi in the air of overground therapy chambers in Szczawnica sanatorium and subterranean inhalation chambers in Bochnia Salt Mine health resort revealed that in the case of bacteria – emission from the patients and in the cases of fungi – transport with atmospheric (outdoor) air were the major processes responsible for microbiological contamination of indoor premises.
Abstract: to perform comparative analyzes of the size distributions of bacteria and fungi in the air of overground therapy chambers in Szczawnica sanatorium and subterranean inhalation chambers in Bochnia Salt Mine health resort taking into account influence of the season and presence of pathogenic species. bioaerosol samples were collected using 6-stage Andersen impactor. Bacterial and fungal aerosol concentrations and size distributions were calculated and isolated microorganisms were taxonomically identified based on their morphological, biochemical, and molecular features. Results: in both treatment rooms and atmospheric (outdoor) air, the acceptable microbial pollution levels were periodically exceeded. The size distribution analyzes revealed that in the case of bacteria – emission from the patients and in the case of fungi – transport with atmospheric (outdoor) air were the major processes responsible for microbiological contamination of indoor premises. The majority of microbial particulates were present in the air of studied premises as single bacterial vegetative cells, spores and fungal conidia or (most commonly) formed small microbial or microbial-dust aggregates. This phenomenon may have a significant effect on patients’ actual exposure (especially on those treated for respiratory diseases) in terms of the dose of inhaled particles. the microbiological quality of the air in sanatoriums and health resorts is a key factor for their therapeutic and prophylactic functions. When microbial pollution crossed the acceptable level, the measures that enable reducing undesirable contamination should be introduced, especially if large groups of patients undergo such therapy.

6 citations

Journal ArticleDOI
TL;DR: There was a wide range of recoveries ranging from 0–100% when the cellulose acetate filter was used to detect phages in bioaerosols within and around broiler houses, and further studies are needed to accurately determine the collection efficiencies of viruses.
Abstract: Air quality within and around confined animal housing operations is important from both occupational exposure and environmental quality perspectives. Appropriate sampling equipment should be available so that bioaerosols are adequately characterized in terms of their component microbial populations. In this study the efficacy of a commercially available impaction-based bioaerosol sampler (SAS-100) was evaluated in terms of its ability to detect male-specific coliphages within and around poultry broiler houses. In addition to the manufacturer recommended agar medium, cellulose and cellulose-acetate filter media were also used as the collection surface. The agar medium and the cellulose ester filters provided very high recoveries of phages as compared to the cellulose filter (P<0.05). There was a wide range of recoveries ranging from 0–100% when the cellulose acetate filter was used to detect phages in bioaerosols within and around broiler houses. The results suggest that the sampler is capable of concentrating male-specific coliphages from bioaerosols. However, further studies are still needed to accurately determine the collection efficiencies of viruses.

6 citations

Journal ArticleDOI
TL;DR: The data presented suggest that carpet cleaning products, containing non-pathogenic Bacillus spores present a low potential for inhalation exposure and consequently minimal risk of adverse effects.

6 citations

Journal ArticleDOI
TL;DR: In this article, the authors compare two electrostatic aerosol sampler designs, a commercial product consisting of a flat collector plate located in the same plane as the charging needles and an axisymmetric design sampling directly to a liquid droplet.
Abstract: Electrostatic sampling is a promising method for the collection of bioaerosol particles. Although the underlying physics responsible for particle collection are well understood, the collection efficiency of simple passive electrostatic samplers is difficult to predict. Under these conditions, the collection efficiency becomes very sensitive to ambient air current and particle size, especially for submicron particles relevant for airborne virus transmission. In this paper, we compare two electrostatic aerosol sampler designs, a commercial product consisting of a flat collector plate located in the same plane as the charging needles and an axisymmetric design sampling directly to a liquid droplet. The aerosol particle collection efficiency of the samplers is investigated for particle size ranging from 0.25 to 2 µm while the air flow velocity surrounding the samplers is varied from 0.3 to 1 m s–1. For the planar design, at all ambient flow velocities, the submicron fraction of the particles captured originates in streamlines up to a maximum of 75 mm above the surface of the device collector, which greatly limits the volume of air being effectively sampled. The axisymmetric design features a non-monotonic capture efficiency as a function of particle size, with a minimum between 0.4 and 0.8 µm. The flow field in the inter-electrode region, captured using particle image velocimetry (PIV) reveals the presence of strong recirculation zones that can be responsible for the increased collection efficiency for very small particles.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023133
2022235
202195
202094
201989
201871