Relationship between aerosol concentration and airborne microbe including porcine sapelovirus concentration in Japanese weaning swine houses

Naide, Takanori; Ikeguchi, Atsuo; Islam, Aminul; Katsuda, Ken; Kawashima, Kenji; Nakakubo, Ryoh; Miyazaki, Ayako

doi:10.13031/iles.18-118

Cited by 9 publications

(21 citation statements)

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“…The aerosol particle numbers were measured by the Optical Particle Sizer (OPS) Model 3330 (TSI Inc., Shoreview, MN, USA) [29][30][31][32]. The OPS counted the aerosol particle numbers in up to 16 separate channels with a 1-s time resolution and <3000 aerosol particle number concentrations/cm 3 .…”

Section: Measurement Of the Aerosol Particle Numbersmentioning

confidence: 99%

“…Different types of airborne bacteria were collected using a liquid cyclone air sampler (Coriolis µ; Bertin Inc, Montigny-le-Bretonneux, France) [29,30,32,34,35]. A 20-min air sample was collected in 20 mL phosphate-buffered saline with a flow rate of 300 L/min.…”

Section: Collections Culturing and Counting Of Different Types Of Amentioning

confidence: 99%

“…The concentrations of the various types of airborne bacteria were measured according to the standard plate count method by using the cultural medium sheets (Sanita-kun, JNC Corporation, Tokyo, Japan) as recommended by the JNC Corporation, Japan [29,30,32]. Here, a 1-mL stock sample was diluted to 0.1 M, 0.01 M, and 0.001 M using 10-fold serial dilution.…”

Section: Collections Culturing and Counting Of Different Types Of Amentioning

confidence: 99%

“…The statistical analyses were carried out using "R", a free software environment for statistical computing and graphics (www.r-project.org). For determining the significant differences among different types of airborne bacteria, the means and standard deviations of various types of airborne bacteria were calculated [29,30,32]. The results were considered significant at p ≤0.05.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…The results were considered significant at p ≤0.05. The mean concentrations of different sizes of aerosol particles were also calculated, and Spearman correlation tests were utilized for examining the relationships among the various types of airborne bacteria, aerosol particle numbers, temperatures, and RH, with p ≤ 0.05 and R values ≥0.40 being significant [30,32]. The higher R values (almost 1.00) and lower p ≤ 0.05 were considered as strong associations and vice versa.…”

Section: Statistical Analysesmentioning

confidence: 99%

See 4 more Smart Citations

Concentrations of Aerosol Numbers and Airborne Bacteria, and Temperature and Relative Humidity, and Their Interrelationships in a Tie-Stall Dairy Barn

Islam

Ikeguchi

Naide³

2019

Animals

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Aerosol particles and airborne microorganisms are crucial factors of indoor air quality. The purpose of the present study was to evaluate the interrelationships among aerosol numbers, various types of airborne bacteria, temperature, and relative humidity (RH) to decide which parameters have more significant relationships among them. The concentrations of aerosol numbers, airborne total aerobic bacteria, Staphylococcus aureus (S. aureus), and Escherichia coli (E. coli) in the indoor air, as well as indoor and outdoor temperatures and RH, were assessed each week for a total of 20 days in a tie-stall dairy barn during the summer season in Tochigi, Japan. The mean concentrations of the fine aerosol numbers (0.3–2.0 µm) were greater than the mean concentrations of coarse aerosol numbers (5.0–10.0 µm). Among the airborne total aerobic bacteria, the mean concentration of airborne S. aureus was higher compared with airborne E. coli. More significant positive associations were found between outdoor environmental temperatures and aerosol numbers rather than indoor temperatures and aerosol numbers. All three types of airborne bacteria were associated with both outdoor and indoor environmental temperatures. These findings are crucial in the mitigation of aerosol numbers and airborne bacteria in the indoor air of dairy barns.

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Section: Measurement Of the Aerosol Particle Numbersmentioning

confidence: 99%

Section: Collections Culturing and Counting Of Different Types Of Amentioning

confidence: 99%

Section: Collections Culturing and Counting Of Different Types Of Amentioning

confidence: 99%

Section: Statistical Analysesmentioning

confidence: 99%

Section: Statistical Analysesmentioning

confidence: 99%

See 3 more Smart Citations

Concentrations of Aerosol Numbers and Airborne Bacteria, and Temperature and Relative Humidity, and Their Interrelationships in a Tie-Stall Dairy Barn

Islam

Ikeguchi

Naide³

2019

Animals

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Effectiveness of an air cleaner device in reducing aerosol numbers and airborne bacteria from an enclosed type dairy barn

Islam

Ikeguchi

Naide³

2022

Environ Sci Pollut Res

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Relationships Between Aerosol Particles and Airborne Bacteria and their Dependence on Environmental Factors in a Dairy Calf House

Islam¹,

Ikeguchi²,

Naide³

2019

Transactions of the ASABE

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Abstract. The quality of indoor air dramatically affects the health of animals and humans. An investigation was conducted into the relationships among the total number of aerosol particles and different types of airborne bacteria and their dependence on indoor and outdoor environmental factors, including air temperature and relative humidity (RH), in the indoor air of a dairy calf house in Tochigi, Japan, during the summer season. The concentrations of aerosol particles, the concentrations of airborne total aerobic bacteria (, , and spp.) in the indoor air, and the indoor and outdoor temperature and RH were evaluated from 14 weekly measurements. The mean concentration of small aerosol particles (0.3 to 2.0 µm) was higher than the mean concentration of large aerosol particles (2.0 to 10.0 µm) in the summer season. The mean concentration of airborne total aerobic bacteria was higher than the concentrations of airborne , , and spp. Airborne and were positively correlated with the number of 2.0 to 10.0 µm aerosol particles, i.e., high concentrations of 2.0 to 10.0 µm particles were correlated with high concentrations of airborne and . Airborne total aerobic bacteria did not correlate with the number of aerosol particles of any size, but spp. was negatively correlated with the number of 1.0 to 2.0 µm aerosol particles, i.e., high concentrations of 1.0 to 2.0 µm particles were correlated with low concentrations of airborne spp. The indoor temperature and indoor and outdoor RH did not correlate with any airborne bacteria. The outdoor temperature was negatively correlated with spp., i.e., high outdoor temperature was correlated with a low concentration of spp. in the indoor air of the dairy calf house. Both indoor and outdoor temperatures were positively correlated with the number of 0.5 to 5.0 µm aerosol particles, and indoor RH was negatively correlated with the number of 5.0 to 10.0 µm aerosol particles. These findings will be important for elucidating the role of aerosol particles in the transmission of airborne bacteria and ultimately for the mitigation of aerosol particles and airborne bacteria in dairy houses. HighlightsThe number of fine aerosol particles increased with increasing temperatures.Environmental factors had a less critical effect on airborne bacteria than aerosol particles.Airborne E. coli strongly positively correlated with 5.0 to 10.0 µm aerosol particles.Airborne Salmonella spp. negatively correlated with 1.0 to 2.0 µm aerosol particles.Relative humidity did not affect any airborne bacteria. Keywords: Aerosol particle number, Airborne bacteria, Dairy calf, Indoor air, Relationship, Summer season.

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Relationship between aerosol concentration and airborne microbe including porcine sapelovirus concentration in Japanese weaning swine houses

Cited by 9 publications

References 0 publications

Concentrations of Aerosol Numbers and Airborne Bacteria, and Temperature and Relative Humidity, and Their Interrelationships in a Tie-Stall Dairy Barn

Concentrations of Aerosol Numbers and Airborne Bacteria, and Temperature and Relative Humidity, and Their Interrelationships in a Tie-Stall Dairy Barn

Effectiveness of an air cleaner device in reducing aerosol numbers and airborne bacteria from an enclosed type dairy barn

Relationships Between Aerosol Particles and Airborne Bacteria and their Dependence on Environmental Factors in a Dairy Calf House

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