Profile and Characteristics of Culturable Airborne Bacteria in Hangzhou, Southeast of China

Fang, Zhiguo; Yao, Wenchong; Lou, Xiuqin; Hao, Cuimei; Gong, Chan-Juan; Ouyang, Zhiyun

doi:10.4209/aaqr.2014.11.0274

Cited by 24 publications

(18 citation statements)

References 28 publications

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“…Apart from these pathogens, airborne microbial components (e.g., endotoxins, mycotoxins, and glucans) may also strongly influence human health and elicit allergic or inflammatory responses [ 11 , 12 , 13 ]. Furthermore, elevated bacterial concentration in the air is closely associated with the increasing probability of food pollution, deterioration of cosmetics and medicine, and corrosion of metallic materials for infrastructure [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat Events on the Composition of Airborne Bacterial Communities in Urban Ecosystems

Fang

Guo

Zhang

et al. 2018

IJERPH

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Airborne bacteria are significantly affected by meteorological and environmental conditions. However, there is little quantitative data available on the effects of these factors on airborne bacteria in urban ecosystems. In the present study, we analyzed weather-dependent changes in the composition of airborne bacterial communities using high throughput sequencing. Samples were collected before and after a period of constant hot weather at four selected sampling sites (YRBS, ZJGUSJC, TJCR, and BLQG) in Hangzhou. Our results show that the average amount of bacterial 16S rRNA gene copy numbers per m3 of air decreased significantly after constant high temperature. In addition, the number of operational taxonomic units and the Shannon–Wiener diversity indexes of the samples at all four selected sampling sites were significantly decreased after the heat event, showing notable impact on bacterial diversity. We also detected a significant increase in the abundances of spore-forming bacteria. Firmicutes increased from 3.7% to 9.9%, Bacillales increased from 2.6% to 7.6%, and Bacillaceae increased from 1.5% to 5.9%. In addition, we observed an increase in beta-Proteobacteria (18.2% to 50.3%), Rhodocyclaceae (6.9% to 29.9%), and Burkholderiaceae (8.1% to 15.2%). On the other hand, the abundance of alpha-Proteobacteria (39.6% to 9.8%), Caulobacteraceae (17.9% to 0.5%), Sphingomonadaceae (7.2% to 3.3%), and Xanthomonadaceae (3.0% to 0.5%) was significantly lower. Taken together, our data suggest that the composition of airborne bacterial communities varies greatly dependent on heat events, and that such communities include several species that are highly susceptible to high-temperature related stressors such as high air temperature, low relative humidity, and high intensity of solar radiation.

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Section: Introductionmentioning

confidence: 99%

Influence of Heat Events on the Composition of Airborne Bacterial Communities in Urban Ecosystems

Fang

Guo

Zhang

et al. 2018

IJERPH

Self Cite

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“…Some of these microorganisms cause pneumonia (e.g., non-tuberculous mycobacteria (NTM), Legionella and Mycoplasma species), asthma, or allergies (Dannemiller et al, 2016 ; Montagna et al, 2016 ; Nishiuchi et al, 2017 ). More generally, it has been argued that childhood exposure to reduced levels of microbial diversity in and around homes may partially explain the rise in the incidence of allergies and autoimmune disorders in many developed countries (Fujimura et al, 2014 ; Fang et al, 2016 ; Man et al, 2017 ). In high population density indoor environments, such as correctional facilities (Hoge et al, 1994 ), military training centers (Brundage et al, 1988 ), and dormitories, human-to-human transmission often occurs.…”

Section: Introductionmentioning

confidence: 99%

Transmission of Airborne Bacteria across Built Environments and Its Measurement Standards: A Review

2017

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Human health is influenced by various factors including microorganisms present in built environments where people spend most of their lives (approximately 90%). It is therefore necessary to monitor and control indoor airborne microbes for occupational safety and public health. Most studies concerning airborne microorganisms have focused on fungi, with scant data available concerning bacteria. The present review considers papers published from 2010 to 2017 approximately and factors affecting properties of indoor airborne bacteria (communities and concentration) with respect to temporal perspective and to multiscale interaction viewpoint. From a temporal perspective, bacterial concentrations in built environments change depending on numbers of human occupancy, while properties of bacterial communities tend to remain stable. Similarly, the bacteria found in social and community spaces such as offices, classrooms and hospitals are mainly associated with human occupancy. Other major sources of indoor airborne bacteria are (i) outdoor environments, and (ii) the building materials themselves. Indoor bacterial communities and concentrations are varied with varying interferences by outdoor environment. Airborne bacteria from the outdoor environment enter an indoor space through open doors and windows, while indoor bacteria are simultaneously released to the outer environment. Outdoor bacterial communities and their concentrations are also affected by geographical factors such as types of land use and their spatial distribution. The bacteria found in built environments therefore originate from any of the natural and man-made surroundings around humans. Therefore, to better understand the factors influencing bacterial concentrations and communities in built environments, we should study all the environments that humans contact as a single ecosystem. In this review, we propose the establishment of a standard procedure for assessing properties of indoor airborne bacteria using four factors: temperature, relative humidity (RH), air exchange rate, and occupant density, as a minimum requirement. We also summarize the relevant legislation by country. Choice of factors to measure remain controversial are discussed.

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“…The bacterial core found in the near atmosphere of Madrid metropolitan area conforms a rich microbiome, stable across different spatial and temporal changes. Many of these core genera have been registered in other surveys in different urbanized areas [26,69,78,[94][95][96], which suggests that urban environments constitute an ecosystem with many similarities around the globe. series of airborne diversity, as in high elevations [4,33], tropical [22] or rural environments [37] show a greater diversity of habitat.…”

Section: Discussionmentioning

confidence: 99%

Seasonal Changes of the Airborne Microbiome in a Large Urban Area

Núñez¹,

Moreno²,

García³

et al. 2020

Preprint

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Background Compared to soil or aquatic ecosystems, the atmosphere is still an underexplored environment for microbial diversity. Besides its ecological importance, the spatial and temporal characterization of aerosolized microorganisms is relevant for understanding allergy and disease outbreaks, especially in highly populated cities. Results In this study, we surveyed the composition, variability and sources of microbes (bacteria and fungi) in the near surface atmosphere of a highly populated area, spanning ~ 4,000 Km 2 around the city center of Madrid (Spain), in different seasonal periods along two years. We found a core of abundant bacterial genera robust across space and time, most of soil origin, while fungi were more sensitive to environmental conditions. Microbial communities showed clear seasonal patterns driven by variability of environmental factors, mainly temperature and accumulated rain, while local sources played a minor role. We also identified taxa in both kingdoms characteristic of seasonal periods, but not of specific sampling sites or plant coverage. Conclusions The present study suggests that the near surface atmosphere of urban environments constitutes a stable ecosystem, with a relatively homogenous composition, modulated by climatic variations. As such, it contributes to our understanding of the long-term changes associated to the human exposome in the air of highly populated areas.

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Profile and Characteristics of Culturable Airborne Bacteria in Hangzhou, Southeast of China

Cited by 24 publications

References 28 publications

Influence of Heat Events on the Composition of Airborne Bacterial Communities in Urban Ecosystems

Influence of Heat Events on the Composition of Airborne Bacterial Communities in Urban Ecosystems

Transmission of Airborne Bacteria across Built Environments and Its Measurement Standards: A Review

Seasonal Changes of the Airborne Microbiome in a Large Urban Area

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