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  1. Article: Spatiotemporal assessment of aeromycoflora under differing urban green space, sampling height, and meteorological regimes: the atmospheric fungiscape of Thessaloniki, Greece

    Charalampopoulos, Athanasios / Damialis, Athanasios / Vokou, Despoina

    International journal of biometeorology. 2022 May, v. 66, no. 5

    2022  

    Abstract: We studied the diversity and abundance of the airborne fungal spores in the city of Thessaloniki, Greece, for two consecutive years. Air samples were collected at one rooftop station (at 30 m) and six near-ground stations (at 1.5 m) that differed in the ... ...

    Abstract We studied the diversity and abundance of the airborne fungal spores in the city of Thessaloniki, Greece, for two consecutive years. Air samples were collected at one rooftop station (at 30 m) and six near-ground stations (at 1.5 m) that differed in the size and composition of adjacent green spaces. The effects of meteorological factors on airborne fungal spore concentrations were also explored. Cladosporium spores were dominant everywhere in the air of the city. The total concentration of the airborne fungal spores at 30 m was 10 times lower than near the ground. Differences in concentration and composition were far less pronounced among near-ground stations. The attributes of the fungal spore season did not change in a consistent way among stations and years. Concentrations at the near-ground stations matched the grouping of the latter into stations of high, intermediate, and low urban green space. Minimum air temperature was the primary meteorological factor affecting spore abundance, followed by relative humidity. Airborne fungal spores are more homogeneously distributed in the air of the city, but their concentrations decrease more rapidly with height than pollen.
    Keywords Cladosporium ; air ; air temperature ; bioclimatology ; fungal spores ; fungi ; green infrastructure ; pollen ; relative humidity ; Greece
    Language English
    Dates of publication 2022-05
    Size p. 895-909.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 127361-9
    ISSN 0067-8902 ; 0020-7128
    ISSN 0067-8902 ; 0020-7128
    DOI 10.1007/s00484-022-02247-9
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  2. Article ; Online: Spatiotemporal assessment of aeromycoflora under differing urban green space, sampling height, and meteorological regimes: the atmospheric fungiscape of Thessaloniki, Greece.

    Charalampopoulos, Athanasios / Damialis, Athanasios / Vokou, Despoina

    International journal of biometeorology

    2022  Volume 66, Issue 5, Page(s) 895–909

    Abstract: We studied the diversity and abundance of the airborne fungal spores in the city of Thessaloniki, Greece, for two consecutive years. Air samples were collected at one rooftop station (at 30 m) and six near-ground stations (at 1.5 m) that differed in the ... ...

    Abstract We studied the diversity and abundance of the airborne fungal spores in the city of Thessaloniki, Greece, for two consecutive years. Air samples were collected at one rooftop station (at 30 m) and six near-ground stations (at 1.5 m) that differed in the size and composition of adjacent green spaces. The effects of meteorological factors on airborne fungal spore concentrations were also explored. Cladosporium spores were dominant everywhere in the air of the city. The total concentration of the airborne fungal spores at 30 m was 10 times lower than near the ground. Differences in concentration and composition were far less pronounced among near-ground stations. The attributes of the fungal spore season did not change in a consistent way among stations and years. Concentrations at the near-ground stations matched the grouping of the latter into stations of high, intermediate, and low urban green space. Minimum air temperature was the primary meteorological factor affecting spore abundance, followed by relative humidity. Airborne fungal spores are more homogeneously distributed in the air of the city, but their concentrations decrease more rapidly with height than pollen.
    MeSH term(s) Fever ; Greece ; Meteorological Concepts ; Meteorology ; Parks, Recreational ; Spores, Fungal
    Language English
    Publishing date 2022-02-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 280324-0
    ISSN 1432-1254 ; 0020-7128
    ISSN (online) 1432-1254
    ISSN 0020-7128
    DOI 10.1007/s00484-022-02247-9
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  3. Article ; Online: Reply to Betsch and Sprengholz: Higher SARS-CoV-2 infection numbers related to more airborne pollen, regardless of testing frequency.

    Gilles, Stefanie / Traidl-Hoffmann, Claudia / Damialis, Athanasios

    Proceedings of the National Academy of Sciences of the United States of America

    2021  Volume 118, Issue 34

    MeSH term(s) COVID-19 ; Humans ; Pollen ; SARS-CoV-2
    Language English
    Publishing date 2021-09-07
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2110982118
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  4. Article ; Online: Editorial: Climate Change and Aeroallergens.

    Damialis, Athanasios / Smith, Matt / Galán, Carmen

    Frontiers in allergy

    2021  Volume 2, Page(s) 794430

    Language English
    Publishing date 2021-12-20
    Publishing country Switzerland
    Document type Editorial
    ISSN 2673-6101
    ISSN (online) 2673-6101
    DOI 10.3389/falgy.2021.794430
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  5. Article: [No title information]

    Gilles, Stefanie / Damialis, Athanasios / Traidl-Hoffmann, Claudia

    Allergo Journal : interdisziplinare Zeitschrift fur Allergologie und Umweltmedizin : Organ der Deutschen Gesellschaft fur Allergie- und Immunitatsforschung

    2021  Volume 30, Issue 3, Page(s) 66–69

    Title translation Umweltfaktoren, ein "missing link" bei COVID-19.
    Language German
    Publishing date 2021-05-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1136943-7
    ISSN 0941-8849
    ISSN 0941-8849
    DOI 10.1007/s15007-021-4799-4
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  6. Article: Environmental factors: a "missing link" in COVID-19.

    Gilles, Stefanie / Damialis, Athanasios / Traidl-Hoffmann, Claudia

    Allergo journal international

    2021  Volume 30, Issue 3, Page(s) 115–118

    Language English
    Publishing date 2021-04-09
    Publishing country Germany
    Document type Journal Article
    ISSN 2197-0378
    ISSN 2197-0378
    DOI 10.1007/s40629-021-00170-w
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  7. Article ; Online: Adding the variable of environmental complexity into the COVID-19 pandemic equation.

    Damialis, Athanasios / Gilles, Stefanie / Traidl-Hoffmann, Claudia

    Allergy

    2021  Volume 77, Issue 1, Page(s) 331–333

    MeSH term(s) COVID-19 ; Humans ; Pandemics ; SARS-CoV-2
    Language English
    Publishing date 2021-06-15
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 391933-x
    ISSN 1398-9995 ; 0105-4538
    ISSN (online) 1398-9995
    ISSN 0105-4538
    DOI 10.1111/all.14966
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  8. Article ; Online: Airborne pollen and fungi indoors: Evidence from primary schools in Lithuania

    Sauliene, Ingrida / Valiulis, Arunas / Keriene, Ilona / Sukiene, Laura / Dovydaityte, Dovile / Prokopciuk, Nina / Valskys, Vaidotas / Valskiene, Roberta / Damialis, Athanasios

    Heliyon. 2023 Jan., v. 9, no. 1 p.e12668-

    2023  

    Abstract: The number of children suffering from respiratory allergies and asthma has been increasing worldwide and, hence, it is crucial to understand the burden of inhalant biological particles present in school facilities, where children spend one third of their ...

    Abstract The number of children suffering from respiratory allergies and asthma has been increasing worldwide and, hence, it is crucial to understand the burden of inhalant biological particles present in school facilities, where children spend one third of their life. From the perspective of indoor air quality, while there are numerous studies on outdoor bioaerosol exposure, there are still uncertainties regarding the diversity and deposition of airborne pollen and fungi indoors. When it comes to schools, there is limited research as to the potential bioaerosol exposure. Here we studied the indoor environment of public schools aiming to reveal whether primary schools of different sizes and at localities of different levels of urbanization may exhibit a variability in the biodiversity and abundance of particles of biological origin, which could pose a risk to child health. To achieve this, 11 schools were selected, located in a variety of environments, from downtown, to city centre-periphery, and to the suburbs. Fungal and pollen samples were collected from various surfaces in school classrooms and corridors, using passive air sampling and swab sampling. We demonstrated that fungi and pollen are detected in school premises during and after the vegetation season. The highest diversity of bioaerosols was found on the top of cabinets and windowsills, with Penicillium, Cladosporium and Acremonium being the most abundant indoors. The levels of fungi were higher in schools with more students. The diversity and amount of pollen in the spring were significantly higher than in samples collected in autumn. Our findings complemented existing evidence that bioaerosol measurements in schools (including kindergartens or informal education facilities) are vital. Hence, we here suggest that, in addition to monitoring air quality and bacterial levels indoors, fungi and pollen measurements have to be integrated in the existing regular biomonitoring campaigns so as to prevent exposure, increase awareness and manage efficiently allergic symptomatology.
    Keywords Cladosporium ; Penicillium ; air ; air quality ; asthma ; autumn ; bioaerosols ; biodiversity ; child health ; education ; environmental monitoring ; fungi ; pollen ; risk ; spring ; urbanization ; vegetation ; Lithuania ; Aerobiology ; Allergy ; Bioaerosol monitoring ; Environmental health ; Fungal spores ; Indoor air quality ; Pollen concentration
    Language English
    Dates of publication 2023-01
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2022.e12668
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  9. Article ; Online: Pollen long-distance transport associated with symptoms in pollen allergics on the German Alps: An old story with a new ending?

    Bayr, Daniela / Plaza, Maria P. / Gilles, Stefanie / Kolek, Franziska / Leier-Wirtz, Vivien / Traidl-Hoffmann, Claudia / Damialis, Athanasios

    Science of the Total Environment. 2023 July, v. 881 p.163310-

    2023  

    Abstract: Pollen grains are among the main causes of respiratory allergies worldwide and hence they are routinely monitored in urban environments. However, their sources can be located farther, outside cities' borders. So, the fundamental question remains as to ... ...

    Abstract Pollen grains are among the main causes of respiratory allergies worldwide and hence they are routinely monitored in urban environments. However, their sources can be located farther, outside cities' borders. So, the fundamental question remains as to how frequent longer-range pollen transport incidents are and if they may actually comprise high-risk allergy cases. The aim was to study the pollen exposure on a high-altitude location where only scarce vegetation exists, by biomonitoring airborne pollen and symptoms of grass pollen allergic individuals, locally. The research was carried out in 2016 in the alpine research station UFS, located at 2650 m height, on the Zugspitze Mountain in Bavaria, Germany. Airborne pollen was monitored by use of portable Hirst-type volumetric traps. As a case study, grass pollen-allergic human volunteers were registering their symptoms daily during the peak of the grass pollen season in 2016, during a 2-week stay on Zugspitze, 13–24 June. The possible origin of some pollen types was identified using back trajectory model HYSPLIT for 27 air mass backward trajectories up to 24 h. We found that episodes of high aeroallergen concentrations may occur even at such a high-altitude location. More than 1000 pollen grains m⁻³ of air were measured on the UFS within only 4 days. It was confirmed that the locally detected bioaerosols originated from at least Switzerland, and up to northwest France, even eastern American Continent, because of frequent long-distance transport. Such far-transported pollen may explain the observed allergic symptoms in sensitized individuals at a remarkable rate of 87 % during the study period. Long-distance transport of aeroallergens can cause allergic symptoms in sensitized individuals, as evidenced in a sparse-vegetation, low-exposure, ‘low-risk’ alpine environment. We strongly suggest that we need cross-border pollen monitoring to investigate long-distance pollen transport, as its occurrence seems both frequent and clinically relevant.
    Keywords air ; altitude ; bioaerosols ; case studies ; environmental monitoring ; grasses ; humans ; hypersensitivity ; models ; pollen ; pollen season ; vegetation ; France ; Germany ; Switzerland ; Aerobiology ; Airborne pollen ; Alpine environment ; Climate change ; Long-distance transport ; Pollen allergy
    Language English
    Dates of publication 2023-07
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.163310
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  10. Article ; Online: Airborne pollen grain detection from partially labelled data utilising semi-supervised learning

    Jin, Benjamin / Milling, Manuel / Plaza, Maria Pilar / Brunner, Jens O. / Traidl-Hoffmann, Claudia / Schuller, Björn W. / Damialis, Athanasios

    Science of the Total Environment. 2023 Sept., v. 891 p.164295-

    2023  

    Abstract: Airborne pollen monitoring has been conducted for more than a century now, as knowledge of the quantity and periodicity of airborne pollen has diverse use cases, like reconstructing historic climates and tracking current climate change, forensic ... ...

    Abstract Airborne pollen monitoring has been conducted for more than a century now, as knowledge of the quantity and periodicity of airborne pollen has diverse use cases, like reconstructing historic climates and tracking current climate change, forensic applications, and up to warning those affected by pollen-induced respiratory allergies. Hence, related work on automation of pollen classification already exists. In contrast, detection of pollen is still conducted manually, and it is the gold standard for accuracy. So, here we used a new-generation, automated, near-real-time pollen monitoring sampler, the BAA500, and we used data consisting of both raw and synthesised microscope images. Apart from the automatically generated, commercially-labelled data of all pollen taxa, we additionally used manual corrections to the pollen taxa, as well as a manually created test set of bounding boxes and pollen taxa, so as to more accurately evaluate the real-life performance. For the pollen detection, we employed two-stage deep neural network object detectors. We explored a semi-supervised training scheme to remedy the partial labelling. Using a teacher-student approach, the model can add pseudo-labels to complete the labelling during training. To evaluate the performance of our deep learning algorithms and to compare them to the commercial algorithm of the BAA500, we created a manual test set, in which an expert aerobiologist corrected automatically annotated labels. For the novel manual test set, both the supervised and semi-supervised approaches clearly outperform the commercial algorithm with an F1 score of up to 76.9 % compared to 61.3 %. On an automatically created and partially labelled test dataset, we obtain a maximum mAP of 92.7 %. Additional experiments on raw microscope images show comparable performance for the best models, which potentially justifies reducing the complexity of the image generation process. Our results bring automatic pollen monitoring a step forward, as they close the gap in pollen detection performance between manual and automated procedure.
    Keywords algorithms ; automation ; climate change ; data collection ; environment ; forensic sciences ; models ; periodicity ; pollen ; Aerobiology ; Automatic detection ; Object detection ; Semi-supervised learning ; Deep learning ; Pollen taxonomy ; CNN ; IoU ; mAP
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.164295
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