Seasonal variation of the dominant allergenic fungal aerosols – One year study from southern Indian region

Priyamvada, Hema; Singh, Raj Kamal; Akila, M.; Ravikrishna, R.; Verma, Rama Shanker; Gunthe, Sachin S.

doi:10.1038/s41598-017-11727-7

Cited by 59 publications

(38 citation statements)

References 69 publications

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“…On the other hand, fungi displayed an increase in richness and diversity in the autumn/winter period, which is consistent with several previous studies. For example, members of the genera Alternaria, Cladosporium and Stemphylium, among others, display increased ambient concentrations during high relative humidity periods (Llorente et al ., 2012; Priyamvada et al ., 2017). Furthermore, it has been shown that filamentous fungi can form biofilms when they grow on surfaces (Harding et al ., 2009).…”

Section: Discussionmentioning

confidence: 99%

Extremophilic microbial communities on photovoltaic panel surfaces: a two‐year study

Tanner

Molina‐Menor

Latorre‐Pérez³

et al. 2020

Microbial Biotechnology

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Solar panel surfaces can be colonized by microorganisms adapted to desiccation, temperature fluctuations and solar radiation. Although the taxonomic and functional composition of these communities has been studied, the microbial colonization process remains unclear. In the present work, we have monitored this microbial colonization process during 24 months by performing weekly measurements of the photovoltaic efficiency, carrying out 16S rRNA gene high-throughput sequencing, and studying the effect of antimicrobial compounds on the composition of the microbial biocenosis. This is the first time a long-term study of the colonization process of solar panels has been performed, and our results reveal that species richness and biodiversity exhibit seasonal fluctuations and that there is a trend towards an increase or decrease of specialist (solar panel-adapted) and generalist taxa, respectively. On the former, extremophilic bacterial genera Deinococcus, Hymenobacter and Roseomonas and fungal Neocatenulostroma, Symmetrospora and Sporobolomyces tended to dominate the biocenosis; whereas Lactobacillus sp or Stemphyllium exhibited a decreasing trend. This profile was deeply altered by washing the panels with chemical agents (Virkon), but this did not lead to an increase of the solar panels efficiency. Our results show that solar panels are extreme environments that force the selection of a particular microbial community.

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Section: Discussionmentioning

confidence: 99%

Extremophilic microbial communities on photovoltaic panel surfaces: a two‐year study

Tanner

Molina‐Menor

Latorre‐Pérez³

et al. 2020

Microbial Biotechnology

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“…Although the previous studies [19], documented that “change in weather”, as a non-allergic trigger, is less involved in the occurrence of AE, meteorological parameters might exhibit a substantial influence on the concentration of atmospheric allergenic bioaerosol [44, 49]. Thus, some authors documented significant impact of inter and intra-day change in humidity 2 days before the admission date for asthma [30, 40].…”

Section: Discussionmentioning

confidence: 99%

Association of molds and metrological parameters to frequency of severe asthma exacerbation

Al‐Ahmad

Jusufović

Arifhodžić

et al. 2019

Allergy Asthma Clin Immunol

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Background Sensitization to airborne molds may be a risk factor for severe asthma and direct cause of asthma exacerbation (AE). Methods A prospective, 1-year (April 2016–March 2017) study, done in Kuwait Allergy Centre, investigated the link between AEs with exposure to outdoor molds and the role of meteorological parameters in mold sensitized patients and compared with non-allergic asthma patients who had asthma deterioration. The total of 676 adult asthmatics with moderate-severe AEs were included and divided into atopic (85.65%) and non-atopic group. Atopy was defined by positive skin prick test (SPT) to at least one inhalant allergen. Data regarding atopy and asthma severity were collected from patient’s records. Patients with symptoms and signs of acute respiratory infection and patient sensitized to indoor allergens only were excluded. Daily count of local pollens (Salsola kali, Bermuda grass) and molds (Aspergillus, Alternaria and Cladosporium) were obtained from the Aerobiology department. Daily metrological parameters (atmospheric pressure-AP, temperature-T and relative humidity-RH) were provided by Kuwait Environment Public Authority. Count of spores/m 3 and weather variable are shown on weekly basis. The year circle was divided into 4 Seasons (1, 2, 3, 4) accordingly to typical desert climate. Results Sensitization to molds was relatively high but significantly less (25.0%) if compared to the pollens sensitization. The highest number of AEs was in season 4 for both molds and pollens sensitized patients. Seasonal patterns for both allergens were significant and positively correlated with RH and AP. In season 1 only, mold sensitized patients showed higher rate of AEs. Non-atopic patients have been less sensitive to increased RH than atopic. Negative correlation with T was similar in both atopic and non-atopic patients. Conclusion Despite of high rate of sensitization to molds, their significant role in triggering AE was not found in desert environment. Typical desert climate and high allergencity of local weeds outweigh the influence of the molds.

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“…The most common health issues in such cases include: asthma, allergic alveolitis or toxic organic dust syndrome (Kołacz and Dobrzański 2006;Millner 2009;Samadi et al 2013;Butler and Madhavan 2017;Douglas et al 2018). It has been demonstrated that inhalation of fungal aerosols can affect humans in three major ways: by causing infectious diseases, by inducing and enhancing allergic reactions and by causing mycotoxin-induced severe toxic reactions, sometimes leading to death in immunocompromised people (Priyamvada et al 2017).…”

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confidence: 99%

Size distribution and concentration of fungal aerosol in animal premises of a zoological garden

Grzyb

Lenart‐Boroń

2020

Aerobiologia

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The exposure to airborne dusts and microorganisms is associated with respiratory diseases and other health effects. Currently, research concerning fungal aerosol and particulate matter levels in animal enclosures of zoological gardens is very scarce. Such premises are characterized by numerous sources of air contamination, and they are both working environment and popular tourist attractions. This study aimed to assess the levels of fungal aerosol in animal premises (tapirs, giraffes, pygmy hippos, monkeys, meerkats, pheasants, ostriches, exotarium) of the Kraków Zoo. The bioaerosol samples were collected using a six-stage Andersen impactor to assess the concentrations and size distribution of airborne fungi. Particulate matter (PM 10 , PM 4 , PM 2.5 and PM 1 ) concentration was assessed using DustTrak Aerosol Monitor. PM concentrations were relatively low (0.048-0.204 mg/m 3 ) and did not exceed the limit values for occupational exposure. Also, the levels of fungal aerosol in almost all cases did not exceed the limit values. The smallest concentration of the total fungal aerosol was observed in the rooms for hippos (approx. 970 CFU/m 3 ) while the highest-in exotarium (16,800 CFU/m 3 ). The share of respirable fraction of bioaerosol was quite high-from 62.6% in monkey houses to 89.2% in exotarium. Having in mind that bioaerosol-forming fungi may contain allergenic species, attention should be paid to thorough cleaning of animals and their premises, and maintaining appropriate levels of microclimatic parameters in the rooms.

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Seasonal variation of the dominant allergenic fungal aerosols – One year study from southern Indian region

Cited by 59 publications

References 69 publications

Extremophilic microbial communities on photovoltaic panel surfaces: a two‐year study

Extremophilic microbial communities on photovoltaic panel surfaces: a two‐year study

Association of molds and metrological parameters to frequency of severe asthma exacerbation

Size distribution and concentration of fungal aerosol in animal premises of a zoological garden

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