Pre-contamination of new gypsum wallboard with potentially harmful fungal species

Andersen, Birgitte; Dosen, Ina; Lewińska, Anna; Nielsen, Kristian Fog

doi:10.1111/ina.12298

Cited by 42 publications

(38 citation statements)

References 30 publications

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“…Chaetomium spp., together with several other genera such as Stachybotrys , Aspergillus and Penicillium , are of concern because of their ability to grow in the indoor environment and their association with production of bioactive metabolites (Brasel et al., 2005, Samson et al., 2010, Andersen et al., 2016, Došen et al., 2016). Depending on the type of water damaged building material, Chaetomium sensu lato are found in 16–66 % of environmental samples (Flannigan and Miller, 2011, Andersen et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

“…They contribute to the development of the symptoms of both rhinitis and asthma due to the production of mycotoxins and microbial volatile organic compounds as well as the liberation of ascospores and hyphal fragments in the indoor environment (Gonianakis et al., 2005, Apetrei et al., 2009, Polizzi et al., 2009, Mason et al., 2010, Andersen et al., 2011, Miller and McMullin, 2014). Chaetomium globosum is the most common species of the Chaetomiaceae in the indoor environment (Vesper et al., 2007, Ayanbimpe et al., 2010, Straus, 2011, McMullin et al., 2013, Miller and McMullin, 2014), and this species can already be present in new gypsum wallboard (Andersen et al. in press).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diversity and taxonomy ofChaetomiumand chaetomium-like fungi from indoor environments

Wang

Houbraken

Groenewald

et al. 2016

Studies in Mycology

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143

140

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During a study of indoor fungi, 145 isolates belonging to Chaetomiaceae were cultured from air, swab and dust samples from 19 countries. Based on the phylogenetic analyses of DNA-directed RNA polymerase II second largest subunit (rpb2), β-tubulin (tub2), ITS and 28S large subunit (LSU) nrDNA sequences, together with morphological comparisons with related genera and species, 30 indoor taxa are recognised, of which 22 represent known species, seven are described as new, and one remains to be identified to species level. In our collection, 69 % of the indoor isolates with six species cluster with members of the Chaetomium globosum species complex, representing Chaetomium sensu stricto. The other indoor species fall into nine lineages that are separated from each other with several known chaetomiaceous genera occurring among them. No generic names are available for five of those lineages, and the following new genera are introduced here: Amesia with three indoor species, Arcopilus with one indoor species, Collariella with four indoor species, Dichotomopilus with seven indoor species and Ovatospora with two indoor species. The generic concept of Botryotrichum is expanded to include Emilmuelleria and the chaetomium-like species B. muromum (= Ch. murorum) in which two indoor species are included. The generic concept of Subramaniula is expanded to include several chaetomium-like taxa as well as one indoor species. Humicola is recognised as a distinct genus including two indoor taxa. According to this study, Ch. globosum is the most abundant Chaetomiaceae indoor species (74/145), followed by Ch. cochliodes (17/145), Ch. elatum (6/145) and B. piluliferum (5/145). The morphological diversity of indoor Chaetomiaceae as well as the morphological characteristics of the new genera are described and illustrated. This taxonomic study redefines the generic concept of Chaetomium and provides new insight into the phylogenetic relationships among different genera within Chaetomiaceae.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diversity and taxonomy ofChaetomiumand chaetomium-like fungi from indoor environments

Wang

Houbraken

Groenewald

et al. 2016

Studies in Mycology

Self Cite

143

140

View full text Add to dashboard Cite

show abstract

“…Fungal plant diseases are of great concern in agriculture and cause large losses at an estimated 5%–10% of the world’s food production [10]. Fungal contamination and mycotoxin production is also a problem in the built environment [11]. Potentially, natural fungicides, such as chitinases, could replace the chemical fungicides in plant biocontrol [12] and toxic chemicals indoors, and since bacterial chitinases can inhibit fungal growth, they are of particular interest for this purpose [7,13].…”

Section: Introductionmentioning

confidence: 99%

Biological Potential of Chitinolytic Marine Bacteria

et al. 2016

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Chitinolytic microorganisms secrete a range of chitin modifying enzymes, which can be exploited for production of chitin derived products or as fungal or pest control agents. Here, we explored the potential of 11 marine bacteria (Pseudoalteromonadaceae, Vibrionaceae) for chitin degradation using in silico and phenotypic assays. Of 10 chitinolytic strains, three strains, Photobacterium galatheae S2753, Pseudoalteromonas piscicida S2040 and S2724, produced large clearing zones on chitin plates. All strains were antifungal, but against different fungal targets. One strain, Pseudoalteromonas piscicida S2040, had a pronounced antifungal activity against all seven fungal strains. There was no correlation between the number of chitin modifying enzymes as found by genome mining and the chitin degrading activity as measured by size of clearing zones on chitin agar. Based on in silico and in vitro analyses, we cloned and expressed two ChiA-like chitinases from the two most potent candidates to exemplify the industrial potential.

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“…Gypsum wallboard and fiberglass batt insulation also support mold growth on their cardboard or paper backings. Andersen et al (2017) evaluated gypsum wallboard for fungal growth and determined that S. chartarum spores might be within the paper/cardboard surrounding the gypsum during manufacturing. Building materials made of stone, such as concrete and brick, support lower levels of mold; however, the dust on these building materials can provide a nutrient source (Viitanen et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Mycotoxin Production by Stachybotrys chartarum on Water-Damaged Building Materials

2017

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The major question after a flooding event is whether to remove or remediate the building materials so that potentially harmful mold growth and their by-products cannot cause serious health problems for susceptible individuals. The purpose of this study was to determine the growth of Stachybotrys chartarum and corresponding production of macrocyclic trichothecenes on different components of a residential wall up to 65 days after a simulated flood event. Small-scale residential walls constructed of fiberglass batt insulation, oriented strandboard, gypsum wallboard, and lumber were destructively sampled at four time points. All four building materials contained notable levels of macrocyclic trichothecenes on all collection days. The highest concentrations of macrocyclic trichothecenes were on the paper siding of the gypsum wallboard, followed by the paper siding of the batt insulation and wood lumber. There was a significant increase in trichothecene concentration over time, particularly on the gypsum. The DNA concentrations of the mold were significantly higher on the batt insulation than on the wood products, and the mold concentrations also increased over time on the batt insulation and gypsum, but not on the wood products. It was concluded that if a flooding event should occur, the insulation and gypsum should be removed from the home and the remaining materials should be remediated.

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Pre-contamination of new gypsum wallboard with potentially harmful fungal species

Cited by 42 publications

References 30 publications

Diversity and taxonomy ofChaetomiumand chaetomium-like fungi from indoor environments

Diversity and taxonomy ofChaetomiumand chaetomium-like fungi from indoor environments

Biological Potential of Chitinolytic Marine Bacteria

Mycotoxin Production by Stachybotrys chartarum on Water-Damaged Building Materials

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