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Alidokht L, Fitzpatrick K, Butler C, Hunsucker KZ, Braga C, Maza WA, Fears KP, Arekhi M, Lanzarini-Lopes M. UV emitting glass: A promising strategy for biofilm inhibition on transparent surfaces. Biofilm 2024; 7:100186. [PMID: 38495771 PMCID: PMC10940134 DOI: 10.1016/j.bioflm.2024.100186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 03/19/2024] Open
Abstract
Marine biofouling causes serious environmental problems and has adverse impacts on the maritime industry. Biofouling on windows and optical equipment reduces surface transparency, limiting their application for on-site monitoring or continuous measurement. This work illustrates that UV emitting glasses (UEGs) can prevent the establishment and growth of biofilm on the illuminated surfaces. Specifically, this paper describes how UEGs are enabled by innovatively modifying the surfaces of the glass with light scattering particles. Modification of glass surface with silica nanoparticles at a concentration 26.5 μg/cm2 resulted in over ten-fold increase in UV irradiance, while maintaining satisfactory visible and IR transparency metrics of over 99 %. The UEG reduced visible biological growth by 98 % and resulted in a decrease of 1.79 log in detected colony forming units when compared to the control during a 20 day submersion at Port Canaveral, Florida, United States. These findings serve as strong evidence that UV emitting glass should be explored as a promising approach for biofilm inhibition on transparent surfaces.
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Affiliation(s)
- Leila Alidokht
- Environmental and Water Resource Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA, USA
| | - Katrina Fitzpatrick
- Environmental and Water Resource Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA, USA
| | - Caitlyn Butler
- Environmental and Water Resource Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA, USA
| | - Kelli Z. Hunsucker
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Melbourne, FL, USA
| | - Cierra Braga
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Melbourne, FL, USA
| | - William A. Maza
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC, USA
| | - Kenan P. Fears
- Center for Biomolecular Science and Engineering, U.S. Naval Research Laboratory, Washington, DC, USA
| | - Marieh Arekhi
- Environmental and Water Resource Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA, USA
| | - Mariana Lanzarini-Lopes
- Environmental and Water Resource Engineering, Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA, USA
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Antimicrobial activity against Staphylococcus aureus and genome features of Lactiplantibacillus plantarum LR-14 from Sichuan pickles. Arch Microbiol 2022; 204:637. [PMID: 36127470 DOI: 10.1007/s00203-022-03232-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 08/27/2022] [Accepted: 08/30/2022] [Indexed: 11/02/2022]
Abstract
The persistence of Staphylococcus aureus within biofilm can lead to contamination of medical devices and life-threatening infections. Luckily, lactic acid bacteria (LAB) have an inhibitory effect on the growth of these bacteria. This study aims to select LAB strains from fermented vegetables, and analyze their potential inhibition activities against S. aureus. In total, 45 isolates of LAB were successfully isolated from Sichuan pickles, and the CFS of Lactiplantibacillus plantarum LR-14 exerted the strongest inhibitory effect against S. aureus. Moreover, S. aureus cells in planktonic and biofilm states both wrinkled and damaged when treated with the CFS of L. plantarum LR-14. In addition, whole genome sequencing analysis indicates that L. plantarum LR-14 contains various functional genes, including predicted extracellular polysaccharides (EPS) biosynthesis genes, and genes participating in the synthesis and metabolism of fatty acid, implying that L. plantarum LR-14 has the potential to be used as a probiotic with multiple functions.
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Paun VI, Icaza G, Lavin P, Marin C, Tudorache A, Perşoiu A, Dorador C, Purcarea C. Total and Potentially Active Bacterial Communities Entrapped in a Late Glacial Through Holocene Ice Core From Scarisoara Ice Cave, Romania. Front Microbiol 2019; 10:1193. [PMID: 31244788 PMCID: PMC6563852 DOI: 10.3389/fmicb.2019.01193] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 05/13/2019] [Indexed: 01/20/2023] Open
Abstract
Our understanding of the icy-habitat microbiome is likely limited by a lack of reliable data on microorganisms inhabiting underground ice that has accumulated inside caves. To characterize how environmental variation impacts cave ice microbial community structure, we determined the composition of total and potentially active bacterial communities along a 13,000-year-old ice core from Scarisoara cave (Romania) through 16S rRNA gene Illumina sequencing. An average of 2,546 prokaryotic gDNA operational taxonomic units (OTUs) and 585 cDNA OTUs were identified across the perennial cave ice block and analyzed in relation to the geochemical composition of ice layers. The total microbial community and the putative active fraction displayed dissimilar taxa profiles. The ice-contained microbiome was dominated by Actinobacteria with a variable representation of Proteobacteria, while the putative active microbial community was equally shared between Proteobacteria and Firmicutes. Accordingly, a major presence of Cryobacterium, Lysinomonas, Pedobacter, and Aeromicrobium phylotypes homologous to psychrotrophic and psychrophilic bacteria from various cold environments were noted in the total community, while the prevalent putative active bacteria belonged to Clostridium, Pseudomonas, Janthinobacterium, Stenotrophomonas, and Massilia genera. Variation in the microbial cell density of ice strata with the dissolved organic carbon (DOC) content and the strong correlation of DOC and silicon concentrations revealed a major impact of depositional processes on microbial abundance throughout the ice block. Post-depositional processes appeared to occur mostly during the 4,000–7,000 years BP interval. A major bacterial composition shift was observed in 4,500–5,000-year-old ice, leading to a high representation of Beta- and Deltaproteobacteria in the potentially active community in response to the increased concentrations of DOC and major chemical elements. Estimated metabolic rates suggested the presence of a viable microbial community within the cave ice block, characterized by a maintenance metabolism in most strata and growth capacity in those ice deposits with high microbial abundance and DOC content. This first survey of microbial distribution in perennial cave ice formed since the Last Glacial period revealed a complex potentially active community, highlighting major shifts in community composition associated with geochemical changes that took place during climatic events that occurred about 5,000 years ago, with putative formation of photosynthetic biofilms.
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Affiliation(s)
- Victoria I Paun
- Department of Microbiology, Institute of Biology, Bucharest, Romania
| | - Gonzalo Icaza
- Laboratorio de Complejidad Microbiana y Ecología Funcional, Instituto Antofagasta, Universidad de Antofagasta, Antofagasta, Chile.,Centre for Biotechnology and Bioengineering, Universidad de Antofagasta, Antofagasta, Chile
| | - Paris Lavin
- Laboratorio de Complejidad Microbiana y Ecología Funcional, Instituto Antofagasta, Universidad de Antofagasta, Antofagasta, Chile.,Departamento de Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta, Chile
| | - Constantin Marin
- Laboratory of Hydrogeochemistry, "Emil Racovita" Institute of Speleology, Bucharest, Romania
| | - Alin Tudorache
- Laboratory of Hydrogeochemistry, "Emil Racovita" Institute of Speleology, Bucharest, Romania
| | - Aurel Perşoiu
- Department of Microbiology, Institute of Biology, Bucharest, Romania.,"Emil Racovita" Institute of Speleology, Cluj-Napoca, Romania.,Stefan cel Mare University of Suceava, Suceava, Romania
| | - Cristina Dorador
- Laboratorio de Complejidad Microbiana y Ecología Funcional, Instituto Antofagasta, Universidad de Antofagasta, Antofagasta, Chile.,Centre for Biotechnology and Bioengineering, Universidad de Antofagasta, Antofagasta, Chile.,Departamento de Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta, Chile
| | - Cristina Purcarea
- Department of Microbiology, Institute of Biology, Bucharest, Romania
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Amalfitano S, Levantesi C, Garrelly L, Giacosa D, Bersani F, Rossetti S. Water Quality and Total Microbial Load: A Double-Threshold Identification Procedure Intended for Space Applications. Front Microbiol 2018; 9:2903. [PMID: 30574126 PMCID: PMC6291452 DOI: 10.3389/fmicb.2018.02903] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/13/2018] [Indexed: 11/13/2022] Open
Abstract
During longer-lasting future space missions, water renewal by ground-loaded supplies will become increasingly expensive and unmanageable for months. Space exploration by self-sufficient spacecrafts is thus demanding the development of culture-independent microbiological methods for in-flight water monitoring to counteract possible contamination risks. In this study, we aimed at evaluating total microbial load data assessed by selected early-warning techniques with current or promising perspectives for space applications (i.e., HPC, ATP-metry, qPCR, flow cytometry), through the analysis of water sources with constitutively different contamination levels (i.e., chlorinated and unchlorinated tap waters, groundwaters, river waters, wastewaters). Using a data-driven double-threshold identification procedure, we presented new reference values of water quality based on the assessment of the total microbial load. Our approach is suitable to provide an immediate alert of microbial load peaks, thus enhancing the crew responsiveness in case of unexpected events due to water contamination and treatment failure. Finally, the backbone dataset could help in managing water quality and monitoring issues for both space and Earth-based applications.
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Affiliation(s)
- Stefano Amalfitano
- Water Research Institute – National Research Council of Italy, Monterotondo, Italy
| | - Caterina Levantesi
- Water Research Institute – National Research Council of Italy, Monterotondo, Italy
| | | | - Donatella Giacosa
- Centro Ricerche SMAT, Società Metropolitana Acque Torino S.p.A., Turin, Italy
| | - Francesca Bersani
- Centro Ricerche SMAT, Società Metropolitana Acque Torino S.p.A., Turin, Italy
| | - Simona Rossetti
- Water Research Institute – National Research Council of Italy, Monterotondo, Italy
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