Assessment of air purifier on efficient removal of airborne bacteria, Staphylococcus epidermidis, using single-chamber method

Lee, Jung Hoon; Kim, Jeong Yup; Cho, Bo Bae; Anusha, J.R.; Sim, Ju Yong; Raj, C. Justin; Yu, Kook Hyun

doi:10.1007/s10661-019-7876-3

Cited by 18 publications

(14 citation statements)

References 34 publications

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“…They are also important pathogens, especially in hospitals, because it is more common for them to infect immunocompromised patients. The main route of transmission for Staphylococcus bacteria is the contact route, but indoor air testing indicates the presence and the possibility of long-term survival of numerous bacteria of this genus in the air (Becker et al 2014 ; Lee et al 2019 ; Lenart-Boroń et al 2017 ).…”

Section: Resultsmentioning

confidence: 99%

Physicochemical and microbiological characteristics of urban aerosols in Krakow (Poland) and their potential health impact

Wilczyńska-Michalik

Różańska

Bulanda

et al. 2021

Environ Geochem Health

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Eight aerosol samples were collected in Krakow using a low-volume sampler in February and March 2019 during variable meteorological conditions and times of the day, to study their single particles’ properties (size, morphology and chemical composition analyzed using a scanning electron microscope fitted with an energy-dispersive spectrometer) and microbiological characteristics. The content of particles of different chemical compositions larger than 2.5 μm was low. Considering the number of the particles, submicron particles strongly dominated with a high content of ultrafine particles (nanoparticles). Tar ball-type particles were relatively common in the studied samples, while soot was the dominant component. Soot was present as small agglomerates composed of few particles, but also as bigger agglomerates. Metal-containing particles of various chemical characteristics were abundant, with transition metals commonly occurring in these particles. The physicochemical characteristics of aerosols indicate that despite a relatively low mass concentration, their adverse health impact could be very strong because of the high content of nanoparticles, the abundance of soot and other fuel combustion-related particles, and the high incidence of transition metal-rich particles. Microbiological analysis was based on cultures on both solid and liquid agar. The MALDI-TOF method was used for species identification—for bacteria and fungi. Twelve different species of bacteria were isolated from the collected samples of aerosols. The most frequently isolated species was Gram-positive sporulating Bacillus licheniformis. The isolated mold fungi were of the genus Aspergillus.

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Section: Resultsmentioning

confidence: 99%

Physicochemical and microbiological characteristics of urban aerosols in Krakow (Poland) and their potential health impact

Wilczyńska-Michalik

Różańska

Bulanda

et al. 2021

Environ Geochem Health

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“…The achieved levels of reduction are similar to other, non-commercial devices. Huang et al [36] reached 75-85% reduction in bacterial aerosol and 80-90% reduction in fungi, while Lee et al [37] reported 79-82% reduction in bioaerosols. The reported levels are higher than in our more effective construction without a carbon filter; however, both reported devices used HEPA filters, which increase the cost of such an air purifier.…”

Section: Effectiveness Of Bioaerosol Removal By a Low-cost Air Purifiermentioning

confidence: 99%

“…Endotoxin 29%-37% [17] Not commercial device HEPA filter device and UV filter Bioaerosols 79%-82% [37] Aerobiotix Illuvia 500uv system (Aerobiotix, West Carrollton, OH, USA)…”

Section: Ionic Air Purifiersmentioning

confidence: 99%

Non-commercial Air Purifier—The Effectiveness and Safety

et al. 2020

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(1) Background: On the Internet, we can find the guidelines for homemade air purifiers. One of the solutions includes the use of a low-cost ozone generator to decrease the level of odors and biological contaminants. However, the authors do not notify about hazardous effects of ozone generation on human health; (2) Methods: We elaborated our test results on the bacterial and fungal aerosol reduction by the use of two technical solutions of homemade air purifiers. First, including a mesh filter and ozone generator, second including an ozone generator, mesh filter, and carbon filter. (3) Conclusions: After 20 min of ozone generation, the concentration of bacteria decreased by 78% and 48% without and with a carbon filter, while fungi concentration was reduced in the lower range 63% and 40%, respectively. Based on our test results, we proposed a precise periodical operation of homemade air purifier to maintain the permissible level of ozone for the occupants.

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“…However, it has not been tested for bacterial species, and the purification effect of each microorganism cannot be seen directly. Some researchers used aerosol generators to artificially make certain types of microorganisms into aerosols, and verified the purifying effect of air purifiers in the ideal environment of a closed experimental chamber (Lee et al, 2019). Although all the above can intuitively reflect the purification effect, it is not an evaluation of the purification effect of the microorganisms that actually exist in the environment under the dynamic environment of the hospital's normal diagnosis and treatment.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Study on the Scavenging Effect of Steady-state Displacement Air Purification System on Indoor Bioaerosol

Cai

et al. 2022

Aerosol Air Qual. Res.

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Many kinds of microorganisms, including the new coronavirus, can spread through aerosols. There are abundant bio-aerosols in indoor medical environment, and these aerosols are likely to cause infections among medical staff and patients in hospitals.Especially in the current severe situation of the new coronavirus, the use of a steady-state displacement air purification system may have a certain effect on reducing the spread of the new coronavirus or other microorganisms. To analyze the purification effect of the steady-state displacement air purification system on the bio-aerosols in the bronchoscope room of the hospital. In this study, the bio-aerosol in the outpatient department of the Respiratory Medicine Department of the bronchoscope room were collected during different time periods from 2021.04 to 2021.05. Among them, the microorganisms contained in the bio-aerosol are identified by NGS and microorganism culture and strain identification. During the experiment, the researcher took 5 sampling points to collect aerosols, performing NGS and microbial culture counting and identification to detect microorganisms. The total purification efficiency are 88.0% (NGS) and 87.5% (microbial culture count and identification results). The results above was statistically significant. In an occupant environment in the bronchoscope room, the steady-state displacement air purification system has a good removal effect on bio-aerosols. Such purification efficiency may have a positive effect on the control of the new coronavirus epidemic and various infectious diseases.

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Assessment of air purifier on efficient removal of airborne bacteria, Staphylococcus epidermidis, using single-chamber method

Cited by 18 publications

References 34 publications

Physicochemical and microbiological characteristics of urban aerosols in Krakow (Poland) and their potential health impact

Physicochemical and microbiological characteristics of urban aerosols in Krakow (Poland) and their potential health impact

Non-commercial Air Purifier—The Effectiveness and Safety

Study on the Scavenging Effect of Steady-state Displacement Air Purification System on Indoor Bioaerosol

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