Physiological characteristics of 13 common fungal species in bathrooms

Hamada, Nobuyuki; Abe, Niichiro

doi:10.1007/s10267-009-0500-6

Cited by 41 publications

(33 citation statements)

References 6 publications

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“…Biofilm-associated fusaria and their coresident microbes may function as polyextremophiles in plumbing systems by virtue of novel metabolic capabilities that allow them to exploit a variety of challenging environmental niches, including the ability degrade keratin (9,18) and other refractory compounds (22). Metagenomic approaches for dissecting the biofilm microbiome are needed to fully characterize the microbial communities and to determine what impact they have on the diversity of fusaria and vice versa.…”

Section: Discussionmentioning

confidence: 99%

Widespread Occurrence of Diverse Human Pathogenic Types of the Fungus Fusarium Detected in Plumbing Drains

et al. 2011

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It has been proposed that plumbing systems might serve as a significant environmental reservoir of human-pathogenic isolates of Fusarium. We tested this hypothesis by performing the first extensive multilocus sequence typing (MLST) survey of plumbing drain-associated Fusarium isolates and comparing the diversity observed to the known diversity of clinical Fusarium isolates. We sampled 471 drains, mostly in bathroom sinks, from 131 buildings in the United States using a swabbing method. We found that 66% of sinks and 80% of buildings surveyed yielded at least one Fusarium culture. A total of 297 isolates of Fusarium collected were subjected to MLST to identify the phylogenetic species and sequence types (STs) of these isolates. Our survey revealed that the six most common STs in sinks were identical to the six most frequently associated with human infections. We speculate that the most prevalent STs, by virtue of their ability to form and grow in biofilms, are well adapted to plumbing systems. Six major Fusarium STs were frequently isolated from plumbing drains within a broad geographic area and were identical to STs frequently associated with human infections.

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Section: Discussionmentioning

confidence: 99%

Widespread Occurrence of Diverse Human Pathogenic Types of the Fungus Fusarium Detected in Plumbing Drains

et al. 2011

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“…A possible source of alkaline fungal ␤-mannanases is the number of alkali-tolerant fungi that have been isolated from limestone caves and bathrooms [121][122][123]. Of these, only Acremonium sp.…”

Section: Paper and Pulp Production And Detergent Formulationsmentioning

confidence: 99%

Fungal β-mannanases: Mannan hydrolysis, heterologous production and biotechnological applications

Zyl

Rose

Trollope

et al. 2010

Process Biochemistry

158

104

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“…In accordance with a previous study Hamada and Abe, 2009 , after pre-culture of the colonies of sample strains and reference strains, 0.5 mL of the conidial suspension from each strain was plated uniformly on two or more culture plates containing media with different compositions see below . All the plates were incubated at 25 1 for 10-12 d in an incubator.…”

Section: Morphological Characterization Of the Strainsmentioning

confidence: 99%

“…Moreover, previous studies showed that Ochroconis was found not only outdoors but, often, also in indoor locations, especially detergentrich environments such as bathroom areas and washing machines Hamada, 2005;Lain and de Hoog, 2010;Samerpitak et al, 2015 . Ochroconis humicola isolated from detergent-rich environments could use detergents as nutrients, which is unique because surfactants generally inhibit the growth of fungi Hamada and Abe, 2009 . Interestingly, the Ochroconis species using detergents as nutrients are not only O. humicola.…”

Section: Introductionmentioning

confidence: 99%

Molecular and Biological Differences Among <i>Ochroconis</i> Strains Collected from Indoor and Outdoor Environments

Hamada

Abe²

2018

Biocontrol Sci.

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The molecular, morphological, and physiological characters of 55 Ochroconis strains collected from indoor and outdoor environments were studied. In Japan, Ochroconis species are often found in indoor detergent-rich environments, such as bathrooms and washing machines, and the predominant species have been identified as O. humicola, similar to that in other Asian and European countries. Although Ochroconis species have rarely been found in outdoor environments such as mountains, forests, and agricultural fields, in the present study, Ochroconis strains were specifically isolated from the soils of urban city parks. Phylogenetic analysis conducted using the 28S ribosomal RNA 28S rDNA gene sequence showed that almost all of the Ochroconis strains found in indoor environments i.e., water supply were O. humicola. Although city parks were often surrounded by residences, more than half of the Ochroconis strains collected from the soils of city parks examined in this study were different Ochroconis species. The ability to use detergents as nutrients was found in a new genetic group probably a new species isolated from the soils of city parks as well as in O. humicola and O. constricta. Ochroconis humicola is assumed to adapt mostly to indoor environments and to penetrate from the outdoors, e.g., soils of urban areas. To elucidate the factors promoting indoor fungal predominance, the ability of using surfactants as nutrients was compared among these three species. Additionally, growth under alkaline and drought conditions, and heat tolerance were examined. Indoor predominance of O. humicola compared to that of the other two species was attributed to the ability of using a non-ionic surfactant as nutrient and to growth under alkaline conditions.

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Physiological characteristics of 13 common fungal species in bathrooms

Cited by 41 publications

References 6 publications

Widespread Occurrence of Diverse Human Pathogenic Types of the Fungus Fusarium Detected in Plumbing Drains

Widespread Occurrence of Diverse Human Pathogenic Types of the Fungus Fusarium Detected in Plumbing Drains

Fungal β-mannanases: Mannan hydrolysis, heterologous production and biotechnological applications

Molecular and Biological Differences Among <i>Ochroconis</i> Strains Collected from Indoor and Outdoor Environments

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