Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment
Background: Filamentous fungi are well known for their production of substances with antimicrobial activities, several of which have formed the basis for the development of new clinically important antimicrobial agents. Recently, environments polluted with extraordinarily high levels of antibiotics...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2012-05-01
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| Series: | Infection Ecology & Epidemiology |
| Subjects: | |
| Online Access: | http://www.infectionecologyandepidemiology.net/index.php/iee/article/view/11591/pdf_1 |
| _version_ | 1811240776876687360 |
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| author | K. Stefan Svahn Ulf Göransson Hesham El-Seedi Lars Bohlin D.G. Joakim Larsson Björn Olsen Erja Chryssanthou |
| author_facet | K. Stefan Svahn Ulf Göransson Hesham El-Seedi Lars Bohlin D.G. Joakim Larsson Björn Olsen Erja Chryssanthou |
| author_sort | K. Stefan Svahn |
| collection | DOAJ |
| description | Background: Filamentous fungi are well known for their production of substances with antimicrobial activities, several of which have formed the basis for the development of new clinically important antimicrobial agents. Recently, environments polluted with extraordinarily high levels of antibiotics have been documented, leading to strong selection pressure on local sentinel bacterial communities. In such microbial ecosystems, where multidrug-resistant bacteria are likely to thrive, it is possible that certain fungal antibiotics have become less efficient, thus encouraging alternative strategies for fungi to compete with bacteria. Methods: In this study, sediment of a highly antibiotic-contaminated Indian river was sampled in order to investigate the presence of cultivable filamentous fungi and their ability to produce substances with antimicrobial activity. Results: Sixty one strains of filamentous fungi, predominantly various Aspergillus spp. were identified. The majority of the Aspergillus strains displayed antimicrobial activity against methicillin-resistant Staphylococcus aureus, extended-spectrum beta-lactamase-producing Escherichia coli, vancomycin-resistant Enterococcus faecalis and Candida albicans. Bioassay-guided isolation of the secondary metabolites of A. fumigatus led to the identification of gliotoxin. Conclusion: This study demonstrated proof of principle of using bioassay-guided isolation for finding bioactive molecules. |
| first_indexed | 2024-04-12T13:26:18Z |
| format | Article |
| id | doaj.art-60debef814ce4ef881d1194cecda541d |
| institution | Directory Open Access Journal |
| issn | 2000-8686 |
| language | English |
| last_indexed | 2024-04-12T13:26:18Z |
| publishDate | 2012-05-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Infection Ecology & Epidemiology |
| spelling | doaj.art-60debef814ce4ef881d1194cecda541d2022-12-22T03:31:18ZengTaylor & Francis GroupInfection Ecology & Epidemiology2000-86862012-05-01201610.3402/iee.v2i0.11591Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sedimentK. Stefan SvahnUlf GöranssonHesham El-SeediLars BohlinD.G. Joakim LarssonBjörn OlsenErja ChryssanthouBackground: Filamentous fungi are well known for their production of substances with antimicrobial activities, several of which have formed the basis for the development of new clinically important antimicrobial agents. Recently, environments polluted with extraordinarily high levels of antibiotics have been documented, leading to strong selection pressure on local sentinel bacterial communities. In such microbial ecosystems, where multidrug-resistant bacteria are likely to thrive, it is possible that certain fungal antibiotics have become less efficient, thus encouraging alternative strategies for fungi to compete with bacteria. Methods: In this study, sediment of a highly antibiotic-contaminated Indian river was sampled in order to investigate the presence of cultivable filamentous fungi and their ability to produce substances with antimicrobial activity. Results: Sixty one strains of filamentous fungi, predominantly various Aspergillus spp. were identified. The majority of the Aspergillus strains displayed antimicrobial activity against methicillin-resistant Staphylococcus aureus, extended-spectrum beta-lactamase-producing Escherichia coli, vancomycin-resistant Enterococcus faecalis and Candida albicans. Bioassay-guided isolation of the secondary metabolites of A. fumigatus led to the identification of gliotoxin. Conclusion: This study demonstrated proof of principle of using bioassay-guided isolation for finding bioactive molecules.http://www.infectionecologyandepidemiology.net/index.php/iee/article/view/11591/pdf_1secondary metabolitesAspergillusgliotoxin |
| spellingShingle | K. Stefan Svahn Ulf Göransson Hesham El-Seedi Lars Bohlin D.G. Joakim Larsson Björn Olsen Erja Chryssanthou Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment Infection Ecology & Epidemiology secondary metabolites Aspergillus gliotoxin |
| title | Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment |
| title_full | Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment |
| title_fullStr | Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment |
| title_full_unstemmed | Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment |
| title_short | Antimicrobial activity of filamentous fungi isolated from highly antibiotic-contaminated river sediment |
| title_sort | antimicrobial activity of filamentous fungi isolated from highly antibiotic contaminated river sediment |
| topic | secondary metabolites Aspergillus gliotoxin |
| url | http://www.infectionecologyandepidemiology.net/index.php/iee/article/view/11591/pdf_1 |
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