Temporal variation in airborne microbial populations and microbially-derived allergens in a tropical urban landscape

Woo, Anthony C.; Brar, Manreetpal Singh; Chan, Yuen-Yan; Lau, Maggie C. Y.; Leung, Fung Ping; Scott, James A.; Vrijmoed, L. L. P.; Zawar-Reza, Peyman; Pointing, Stephen B.

doi:10.1016/j.atmosenv.2013.03.047

Cited by 110 publications

(96 citation statements)

References 42 publications

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“…Our previous investigations indicated that the bacterial communities at an altitude of 3000 m over the Noto Peninsula included more than 300 phylotypes, which were predominantly composed of Bacilli phylotypes . Bacterial groups belonging to Bacilli, Proteobacteria, and Actinobacteria have been reported as airborne bacteria around European mountains (Vaïtilingom et al, 2012) and over Asian rural regions (Woo et al, 2013). Some Bacilli isolates were found to act as ice-nucleating agents and to be involved in ice cloud (Matulova et al, 2014;Mortazavi et al, 2015).…”

Section: Comparing the Community Structures Of Atmospheric Bacteria Bmentioning

confidence: 99%

“…The airborne microorganisms around North American mountains (2700 m above sea level) were also found to increase their species diversities in response to Asian dust events (Smith et al, 2013). Highthroughput sequencing technology can generate large numbers of nucleotide sequences and the sequencing database has played an important role for investigation of airborne bacterial compositions (Brodie et al, 2007;Woo et al, 2013). Indeed, the analyses using high-throughput sequencing has demonstrated that airborne bacterial populations at ground levels change in response to pollutants from Beijing (Cao et al, 2014) and African dust events (Mazar et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Variations in airborne bacterial communities at high altitudes over the Noto Peninsula (Japan) in response to Asian dust events

et al. 2017

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Abstract. Aerosol particles, including airborne microorganisms, are transported through the free troposphere from the Asian continental area to the downwind area in East Asia and can influence climate changes, ecosystem dynamics, and human health. However, the variations present in airborne bacterial communities in the free troposphere over downwind areas are poorly understood, and there are few studies that provide an in-depth examination of the effects of long-range transport of aerosols (natural and anthropogenic particles) on bacterial variations. In this study, the vertical distributions of airborne bacterial communities at high altitudes were investigated and the bacterial variations were compared between dust events and non-dust events.

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Section: Comparing the Community Structures Of Atmospheric Bacteria Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variations in airborne bacterial communities at high altitudes over the Noto Peninsula (Japan) in response to Asian dust events

et al. 2017

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“…The main phylotypes in the three air samples were clustered into the classes Deinococci, Bacilli, Cyanobacteria, Proteobacteria, Flavobacteria and Actinobacteria (Fig. 4a), which have been reported to be airborne bacterial populations on European mountains (Vaïtilingom et al, 2012) as well as over Asian rural regions (Woo et al, 2013). In our previous investigations performed over the Noto Peninsula during two dust events, the 16S rDNA clone libraries recovered from air samples were composed of only a few members of the two classes Bacilli and Actinobacteria (Maki et al, 2013).…”

Section: Bacterial Community Structures Among Three Altitudesmentioning

confidence: 99%

Vertical distribution of airborne bacterial communities in an Asian-dust downwind area, Noto Peninsula

Maki

Hara

Kobayashi

et al. 2015

Atmospheric Environment

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Bioaerosols at high altitudes were collected using an aircraft and a balloon.Pyrosequencing using 16S rDNA revealed vertical distributions of airborne bacteria.16S rDNA clone libraries suggested the transport of terrestrial and marine bacteria.Meteorological conditions contribute to vertical variations in airborne bacteria. 3 AbstractBacterial populations transported from ground environments to the atmosphere get dispersed throughout downwind areas and can influence ecosystem dynamics, human health, and climate change. However, the vertical bacterial distribution in the free troposphere was rarely investigated in detail. We collected aerosols at altitudes of 3,000 m, 1,000 m, and 10 m over the Noto Peninsula, Japan, where the westerly winds carry aerosols from continental and marine areas. During the sampling period on March 10, 2012, the air mass at 3,000 m was transported from the Chinese desert region by the westerly winds, and a boundary layer was formed below 2,000 m. Pyrosequencing targeting 16S rRNA genes (16S rDNA) revealed that the bacterial community at 3,000 m was predominantly composed of terrestrial bacteria, such as Bacillus and Actinobacterium species. In contrast, those at 1,000 m and 10 m included marine bacteria belonging to the classes Cyanobacteria and Alphaproteobacteria. The entire 16S rDNA sequences in the clone libraries were identical to those of the terrestrial and marine bacterial species, which originated from the Chinese desert region and the Sea of Japan, respectively. The origins of air masses and meteorological conditions contribute to vertical variations in the bacterial communities in downwind atmosphere.

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“…Although bacterial communities and endotoxin concentrations have been reported in several studies (Gorny and Dutkiewicz 2002;Park et al, 2002;Herr et al, 2003;Oppliger et al, 2005;Rusca et al, 2008;Tendal and Madsen, 2011), only a few studies have evaluated their relationships with the types of land use (Mueller-Anneling et al, 2004;Madsen, 2006;Bowers et al, 2010;Tager et al, 2010;Woo et al, 2013). In a study designed to investigate the risk factors of childhood asthma, air samples were collected from several locations throughout Fresno, a city in central California, USA; the study revealed that the endotoxin concentrations varied among various geographical regions.…”

Section: Introductionmentioning

confidence: 99%

“…However, outdoor exposure is also crucial. Studies have indicated that bacterial and endotoxin concentrations vary among different types of outdoor environment, with considerable seasonal variations as well (Mueller-Anneling et al, 2004;Morgenstern et al, 2005;Bowers et al, 2010;Tager et al, 2010;Jeon et al, 2011;Bowers et al, 2012;Haas et al, 2013;Woo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distributions and Land-Use Regression Models of Ambient Bacteria and Endotoxins in the Greater Taipei Area

Kallawicha

Lung

Chuang

et al. 2015

Aerosol Air Qual. Res.

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Ambient bacteria and endotoxins are components of bioaerosols, which are abundant in ambient air. Exposure to ambient bacteria and endotoxins has been associated with respiratory symptoms. We monitored the spatiotemporal distributions of ambient bioaerosols in the Greater Taipei area by using multisite sampling and developed regression models for ambient bacterial and endotoxin concentrations. Forty-four representative sampling sites were selected from the Greater Taipei area. Samples were collected in 4 seasons throughout a 1-y study period. Ambient bacteria were quantified using acridine orange staining, and endotoxins were analyzed using Limulus amebocyte lysate assays. Land-use types and major determinants of the bioaerosols were used to develop regression models. Ambient bacteria ranged from < limit of detection (LOD) to 1.68 × 10 5 cells/m 3 , whereas endotoxins ranged from < LOD to 20.62 EU/m 3 . Significant seasonal variations were observed for both bioaerosols, with the highest concentrations observed in spring. Regression analyses revealed temperature, relative humidity, and particulate matter as the major predictors of ambient bacteria and endotoxins. No land-use type was correlated with any of the bioaerosols. The number of schools and gas stations was positively associated with both bioaerosols. The leave-one-out cross-validation R 2 of the final models for ambient bacteria and endotoxins were 0.11 and 0.31, respectively. The results of this study revealed high spatiotemporal variations in the distributions of ambient bacteria and endotoxins in the Greater Taipei area. Additional potential predictors should be included in future studies to develop better predictive models for ambient bacteria and endotoxins.

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Temporal variation in airborne microbial populations and microbially-derived allergens in a tropical urban landscape

Cited by 110 publications

References 42 publications

Variations in airborne bacterial communities at high altitudes over the Noto Peninsula (Japan) in response to Asian dust events

Variations in airborne bacterial communities at high altitudes over the Noto Peninsula (Japan) in response to Asian dust events

Vertical distribution of airborne bacterial communities in an Asian-dust downwind area, Noto Peninsula

Spatiotemporal Distributions and Land-Use Regression Models of Ambient Bacteria and Endotoxins in the Greater Taipei Area

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