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Black Yeast Diversity on Creosoted Railway Sleepers Changes with Ambient Climatic Conditions

Overview of attention for article published in Microbial Ecology, July 2014
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Title
Black Yeast Diversity on Creosoted Railway Sleepers Changes with Ambient Climatic Conditions
Published in
Microbial Ecology, July 2014
DOI 10.1007/s00248-014-0459-5
Pubmed ID
Authors

Ramazan Gümral, Ayşegül Tümgör, Mehmet Ali Saraçlı, Şinasi Taner Yıldıran, Macit Ilkit, G. Sybren de Hoog

Abstract

The environmental isolation of opportunistic pathogenic black yeasts, which are responsible for a wide spectrum of human infections, is essential to understanding the ecology of clinical fungi. Extreme outdoor environments polluted with aromatic hydrocarbons support the growth of black yeasts in unlikely places, such as railway sleepers. However, there are limited data concerning the diversity of these fungi growing on polluted railway sleepers. In this investigation, we examined 845 railway sleeper samples, obtained from 11 Turkish cities representing altitudes from 25 to 1,893 m, and inoculated the samples onto mycological media for the isolation of black yeasts. Ninety-four samples (11.1 %) yielded positive results for black yeast, with creosoted oak sleepers having a significantly higher number of isolates than concrete sleepers (p < 0.05). Identification based on the ribosomal DNA (rDNA) internal transcribed spacer region revealed the highest prevalence of Exophiala phaeomuriformis, followed by Exophiala dermatitidis, Exophiala heteromorpha, Exophiala xenobiotica, and Exophiala crusticola. This study revealed that railway sleepers harboring black yeasts were predominantly (>75 %) populated with thermophilic species. We observed that altitude might have a significant effect on species diversity. Briefly, E. phaeomuriformis exhibited growth over a wide altitude range, from 30 to 1,893 m. In contrast, E. dermatitidis had a remarkable aversion to low altitudes and exhibited maximum growth at 1,285 m. In conclusion, we speculate that one can predict what species will be found on railway sleepers and their probability and that species diversity primarily depends on sleeper type and altitude height. We believe that this study can contribute new insights into the ecology of black yeasts on railway sleepers and the railway factors that influence their diversity.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 31 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 31 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 8 26%
Researcher 5 16%
Student > Doctoral Student 3 10%
Student > Ph. D. Student 3 10%
Student > Bachelor 2 6%
Other 5 16%
Unknown 5 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 8 26%
Immunology and Microbiology 4 13%
Medicine and Dentistry 4 13%
Biochemistry, Genetics and Molecular Biology 3 10%
Environmental Science 2 6%
Other 5 16%
Unknown 5 16%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 July 2014.
All research outputs
#20,233,066
of 22,758,963 outputs
Outputs from Microbial Ecology
#1,840
of 2,053 outputs
Outputs of similar age
#191,342
of 226,891 outputs
Outputs of similar age from Microbial Ecology
#29
of 34 outputs
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