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Forner E, Ezenarro JJ, Pérez-Montero M, Vigués N, Asensio-Grau A, Andrés A, Mas J, Baeza M, Muñoz-Berbel X, Villa R, Gabriel G. Electrochemical biosensor for aerobic acetate detection. Talanta 2023; 265:124882. [PMID: 37453394 DOI: 10.1016/j.talanta.2023.124882] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 06/17/2023] [Accepted: 06/24/2023] [Indexed: 07/18/2023]
Abstract
There is an increasing demand on alternatives methods to animal testing. Numerous health parameters have been already studied using in vitro devices able to mimic the essential functions of the organs, being the real-time monitoring and response to stimuli their main limitations. Regarding the health of the gut, the short chain fatty acids, and particularly acetate, have emerged as key biomarkers to evaluate gut healthiness and disease development, although the number of acetate biosensors is still very low. This article presents a microbial biosensor based on fully biocompatible materials which is able to detect acetate in aerobic conditions in the range between 11 and 50 mM, and without compromising the viability and function of either bacteria (>90% viability) or mammalian cells (>80% viability). The detection mechanism is based on the metabolism of acetate by Escherichia coli bacteria immobilized on the transducer surface. Ferricyanide is used as a redox mediator to transfer electrons from the acetate metabolism in the bacterial cells to the transducer. High bacterial concentrations are immobilized in the transducer surface (109 cfu mL-1) by electrodeposition of conductive alginate hydrogels doped with reduced graphene oxide. The results show successful outcomes to exploit bacteria as a biosensing tool, based on the use of inkjet printed transducers, biocompatible materials and cell entrapment technologies.
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Affiliation(s)
- E Forner
- Institut de Microelectrònica de Barcelona, IMB-CNM (CSIC), Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - J J Ezenarro
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - M Pérez-Montero
- Basic Sciences Department. Faculty of Medicine and Health Sciences. Universitat Internacional de Catalunya, 08195, Sant Cugat Del Vallès, Barcelona, Spain
| | - N Vigués
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - A Asensio-Grau
- Instituto de Ingenieria de Alimentos para El Desarrollo, Universitat Politècnica de València, Camino de Vera S/n, 46022, València, Spain
| | - A Andrés
- Instituto de Ingenieria de Alimentos para El Desarrollo, Universitat Politècnica de València, Camino de Vera S/n, 46022, València, Spain
| | - J Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - M Baeza
- GENOCOV Research Group, Department of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - X Muñoz-Berbel
- Institut de Microelectrònica de Barcelona, IMB-CNM (CSIC), Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Spain
| | - R Villa
- Institut de Microelectrònica de Barcelona, IMB-CNM (CSIC), Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Spain
| | - G Gabriel
- Institut de Microelectrònica de Barcelona, IMB-CNM (CSIC), Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Spain.
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2
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Mengual L, Ingelmo-Torres M, Roldán F, Carrasco R, Ajami T, Padullés B, Sureda J, Matheu R, Mas J, Ribal M, Izquierdo L, Alcaraz A. Bladder EpiCheck methylation test predicts short- and long-term HG events in bladder cancer patients treated with bacillus Calmette-Guérin. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00468-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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3
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Sablot D, Leibinger F, Dutray A, Van Damme L, Nguyen Them L, Farouil G, Jebali C, Arquizan C, Ibanez-Julia MJ, Laverdure A, Allou T, Chaabane W, Fadat B, Olivier N, Smadja P, Tardieu M, Lachcar M, Mas J, Ousji A, Jurici S, Mourand I, Ferraro A, Dumitrana A, Bensalah ZM, Damon F, Tincau OA, Valverde D, Mekue-Fotso V, Bonafe A, Ortega L, Gaillard N. Is off-label thrombolysis safe and effective in a real-life primary stroke center? A retrospective analysis of data from a 5-year prospective database. Rev Neurol (Paris) 2022; 178:1079-1089. [PMID: 36336491 DOI: 10.1016/j.neurol.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 07/21/2022] [Accepted: 08/13/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Intravenous thrombolysis (IVT) use for acute ischemic stroke (AIS) varies among countries, partly due to guidelines and product labeling changes. The study aim was to identify the characteristics of patients with AIS treated with off-label IVT and to determine its safety when performed in a primary stroke center (PSC). METHODS This observational, single-center study included all consecutive patients admitted to Perpignan PSC for AIS and treated with IVT and patients transferred for EVT, between January 1, 2015 and December 31, 2019. Data of patients treated with IVT according to ("in-label group") or outside ("off-label") the initial guidelines and manufacturer's product specification were compared. Safety was assessed using symptomatic intracerebral hemorrhage (SIH) as the main adverse event. RESULTS Among the 892 patients in the database (834 screened by MRI, 93.5%), 746 were treated by IVT: 185 (24.8%) "in-label" and 561 (75.2%) "off-label". In the "off-label" group, 316 (42.4% of the cohort) had a single criterion for "off-label" use, 197 (26.4%) had two, and 48 (6.4%) had three or more criteria, without any difference in IVT safety pattern among them. SIH rates were comparable between the "off-label" and "in-label" groups (2.7% vs. 1.1%, P=0.21); early neurological deterioration and systematic adverse event due to IVT treatment were similar in the 2 groups. "Off-label" patients had higher in-hospital (8.7% vs. 3.8%, P=0.05) and 3-month mortality rates (12.1% vs 5.4%, P<0.01), but this is explained by confounding factors as they were older (76 vs 67 years, P<0.0001) and more dependent (median modified Rankin scale score 0.4 vs 0.1, P<0.0001) at admission. CONCLUSIONS "Off-label" thrombolysis for AIS seems to be safe and effective in the routine setting of a primary stroke center.
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Affiliation(s)
- D Sablot
- Neurology Department, Perpignan, France; Regional Health agency of Occitanie, Montpellier, France.
| | | | - A Dutray
- Neurology Department, Perpignan, France
| | | | | | - G Farouil
- Radiology Department, Perpignan, France
| | - C Jebali
- Emergency Department, Perpignan, France
| | - C Arquizan
- Neurology Department, Montpellier, France
| | | | | | - T Allou
- Neurology Department, Perpignan, France
| | | | - B Fadat
- Neurology Department, Perpignan, France
| | - N Olivier
- Neurology Department, Perpignan, France
| | - P Smadja
- Radiology Department, Perpignan, France
| | - M Tardieu
- Radiology Department, Perpignan, France
| | - M Lachcar
- Emergency Department, Perpignan, France
| | - J Mas
- Neurology Department, Perpignan, France
| | - A Ousji
- Emergency Department, Perpignan, France
| | - S Jurici
- Neurology Department, Perpignan, France
| | - I Mourand
- Neurology Department, Montpellier, France
| | - A Ferraro
- Neurology Department, Perpignan, France
| | | | | | - F Damon
- Neurology Department, Perpignan, France; Emergency Department, Perpignan, France
| | | | | | | | - A Bonafe
- Radiology Department, Perpignan, France; Neuroradiology Department, Montpellier, France
| | - L Ortega
- Emergency Department, Perpignan, France
| | - N Gaillard
- Neurology Department, Perpignan, France; Neurology Department, Montpellier, France
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Lucena T, Sánchez O, Sanz-Saez I, Acinas SG, Garrido L, Mas J, Macián MC, Ruvira MA, Arahal DR, Pujalte MJ. Parvicella tangerina gen. nov., sp. nov. (Parvicellaceae fam. nov., Flavobacteriales), first cultured representative of the marine clade UBA10066, and Lysobacter luteus sp. nov., from activated sludge of a seawater-processing wastewater treatment plant. Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two strains isolated from a sample of activated sludge that was obtained from a seawater-based wastewater treatment plant on the southeastern Mediterranean coast of Spain have been characterized to achieve their taxonomic classification, since preliminary data suggested they could represent novel taxa. Given the uniqueness of this habitat, as this sort of plants are rare in the world and this one used seawater to process an influent containing intermediate products from amoxicillin synthesis, we also explored their ecology and the annotations of their genomic sequences. Analysis of their 16S rRNA gene sequences revealed that one of them, which was orange-pigmented, was distantly related to
Vicingus serpentipes
(family
Vicingaceae
) and to other representatives of neighbouring families in the order
Flavobacteriales
(class
Flavobacteriia
) by 88–89 % similarities; while the other strain, which was yellow-pigmented, was a putative new species of
Lysobacter
(family
Xanthomonadaceae
, order
Xanthomonadales
, class
Gammaproteobacteria
) with
Lysobacter arseniciresistens
as closest relative (97.3 % 16S rRNA sequence similarity to its type strain). Following a polyphasic taxonomic approach, including a genome-based phylogenetic analysis and a thorough phenotypic characterization, we propose the following novel taxa: Parvicella tangerina gen. nov., sp. nov. (whose type strain is AS29M-1T=CECT 30217T=LMG 32344T), Parvicellaceae fam. nov. (whose type genus is Parvicella), and Lysobacter luteus sp. nov. (whose type strain is AS29MT=CECT 30171T=LMG 32343T).
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Affiliation(s)
- Teresa Lucena
- Colección Española de Cultivos Tipo (CECT), Universitat de València, Valencia, Spain
| | - Olga Sánchez
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Isabel Sanz-Saez
- Departament de Biologia Marina i Oceanografia, Institut de Ciències del Mar, ICM-CSIC, Barcelona, Spain
| | - Silvia G. Acinas
- Departament de Biologia Marina i Oceanografia, Institut de Ciències del Mar, ICM-CSIC, Barcelona, Spain
| | - Laura Garrido
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Jordi Mas
- Departament de Genètica i Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - M. Carmen Macián
- Colección Española de Cultivos Tipo (CECT), Universitat de València, Valencia, Spain
| | - María A. Ruvira
- Colección Española de Cultivos Tipo (CECT), Universitat de València, Valencia, Spain
| | - David R. Arahal
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
| | - María J. Pujalte
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
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5
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Ezenarro JJ, Mas J, Muñoz-Berbel X, Uria N. Advances in bacterial concentration methods and their integration in portable detection platforms: A review. Anal Chim Acta 2022; 1209:339079. [PMID: 35569858 DOI: 10.1016/j.aca.2021.339079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 11/18/2022]
Abstract
Early detection and identification of microbial contaminants is crucial in many sectors, including clinical diagnostics, food quality control and environmental monitoring. Biosensors have recently gained attention among other bacterial detection technologies due to their simplicity, rapid response, selectivity, and integration/miniaturization potential in portable microfluidic platforms. However, biosensors are limited to the analysis of small sample volumes, and pre-concentration steps are necessary to reach the low sensitivity levels of few bacteria per mL required in the analysis of real clinical, industrial or environmental samples. Many platforms already exist where bacterial detection and separation/accumulation systems are integrated in a single platform, but they have not been compiled and critically analysed. This review reports on most recent advances in bacterial concentration/detection platforms with emphasis on the concentration strategy. Systems based on five concentration strategies, i.e. centrifugation, filtration, magnetic separation, electric separation or acoustophoresis, are here presented and compared in terms of processed sample volume, concentration efficiency, concentration time, ability to work with different types of samples, and integration potential, among others. The critical evaluation presented in the review is envision to facilitate the development of future platforms for fast, sensitive and in situ bacterial detection in real sample.
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Affiliation(s)
- Josune J Ezenarro
- Departament de Genètica I de Microbiologia, Universitat Autònoma de Barcelona, 08193, Cerdanyola Del Vallès, Spain; Waterologies S.L, C/ Dinamarca, 3 (nave 9), Polígono Industrial Les Comes, 08700, Igualada, Spain; Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, 08193, Bellaterra, Spain.
| | - Jordi Mas
- Departament de Genètica I de Microbiologia, Universitat Autònoma de Barcelona, 08193, Cerdanyola Del Vallès, Spain
| | - Xavier Muñoz-Berbel
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, 08193, Bellaterra, Spain
| | - Naroa Uria
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, 08193, Bellaterra, Spain; Arkyne Tehcnologies S.L (Bioo), Carrer de La Tecnologia, 17, 08840, Viladecans, Spain.
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6
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Dietvorst J, Ferrer-Vilanova A, Iyengar SN, Russom A, Vigués N, Mas J, Vilaplana L, Marco MP, Guirado G, Muñoz-Berbel X. Bacteria Detection at a Single-Cell Level through a Cyanotype-Based Photochemical Reaction. Anal Chem 2022; 94:787-792. [PMID: 34931815 PMCID: PMC8771638 DOI: 10.1021/acs.analchem.1c03326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 12/06/2021] [Indexed: 12/01/2022]
Abstract
The detection of living organisms at very low concentrations is necessary for the early diagnosis of bacterial infections, but it is still challenging as there is a need for signal amplification. Cell culture, nucleic acid amplification, or nanostructure-based signal enhancement are the most common amplification methods, relying on long, tedious, complex, or expensive procedures. Here, we present a cyanotype-based photochemical amplification reaction enabling the detection of low bacterial concentrations up to a single-cell level. Photocatalysis is induced with visible light and requires bacterial metabolism of iron-based compounds to produce Prussian Blue. Bacterial activity is thus detected through the formation of an observable blue precipitate within 3 h of the reaction, which corresponds to the concentration of living organisms. The short time-to-result and simplicity of the reaction are expected to strongly impact the clinical diagnosis of infectious diseases.
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Affiliation(s)
- Jiri Dietvorst
- Instituto
de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra (Barcelona) 08193, Spain
- Nanobiotechnology
for diagnostics (Nb4D), Department of Chemical and Biomolecular Nanotechnology, Institute for Advanced Chemistry of Catalonia (IQAC,
CSIC), Barcelona 08034, Spain
| | - Amparo Ferrer-Vilanova
- Instituto
de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra (Barcelona) 08193, Spain
- Departament
de Química, Universitat Autònoma
de Barcelona, Bellaterra
(Barcelona) 08193, Spain
| | - Sharath Narayana Iyengar
- Division
of Nanobiotechnology, Department of Protein Science, Science for life
laboratory, KTH Royal Institute of Technology, Stockholm 17165, Sweden
| | - Aman Russom
- Division
of Nanobiotechnology, Department of Protein Science, Science for life
laboratory, KTH Royal Institute of Technology, Stockholm 17165, Sweden
| | - Núria Vigués
- Departament
of Genetics and Microbiology, Universitat
Autònoma de Barcelona, Bellaterra
(Barcelona) 08193, Spain
| | - Jordi Mas
- Departament
of Genetics and Microbiology, Universitat
Autònoma de Barcelona, Bellaterra
(Barcelona) 08193, Spain
| | - Lluïsa Vilaplana
- Nanobiotechnology
for diagnostics (Nb4D), Department of Chemical and Biomolecular Nanotechnology, Institute for Advanced Chemistry of Catalonia (IQAC,
CSIC), Barcelona 08034, Spain
- CIBER
de
Bioingeniería, Biomateriales y Nanomedicina
(CIBER-BBN), Barcelona 08034, Spain
| | - Maria-Pilar Marco
- Nanobiotechnology
for diagnostics (Nb4D), Department of Chemical and Biomolecular Nanotechnology, Institute for Advanced Chemistry of Catalonia (IQAC,
CSIC), Barcelona 08034, Spain
- CIBER
de
Bioingeniería, Biomateriales y Nanomedicina
(CIBER-BBN), Barcelona 08034, Spain
| | - Gonzalo Guirado
- Departament
de Química, Universitat Autònoma
de Barcelona, Bellaterra
(Barcelona) 08193, Spain
| | - Xavier Muñoz-Berbel
- Instituto
de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra (Barcelona) 08193, Spain
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Hosseini A, Mas J. The β-galactosidase assay in perspective: Critical thoughts for biosensor development. Anal Biochem 2021; 635:114446. [PMID: 34752779 DOI: 10.1016/j.ab.2021.114446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 10/21/2021] [Accepted: 11/01/2021] [Indexed: 01/24/2023]
Abstract
Recently, the β-galactosidase assay has become a key component in the development of assays and biosensors for the detection of enterobacteria and E. coli in water quality monitoring. The assay has often performed below its maximum potential, mainly due to a poor choice of conditions. In this study we establish a set of optimal conditions and provide a rough estimate of how departure from optimal values reduces the output of the assay potentially decreasing its sensitivity. We have established that maximum response for detecting low cell concentrations requires an induction of the samples using IPTG at a concentration of 0.2 mM during 180 min. Permeabilization of the samples is mandatory as lack of it results in an almost 60% reduction in assay output. The choice of enzyme substrate is critical as different substrates yield products with different extinction coefficients or fluorescence yields. The concentration of substrate used must be high enough (around 3 to 4 times Km) to ensure that the activity measured is not substrate limited. Finally, as the color/fluorescence of the reaction products is highly dependent on pH, care must be taken to ensure that pH at the time of reading is high enough to provide maximum signal.
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Affiliation(s)
- Anahita Hosseini
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain.
| | - Jordi Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
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8
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Sablot D, Farouil G, Leibinger F, Van Damme L, Aptel S, Fadat B, Tardieu M, Dutray A, Gascou G, Olivier N, Seiller I, Nguyen Them L, Smadja P, Ibanez-Julia MJ, Arquizan C, Mas J, Jurici S, Dumitrana A, Ferraro A, Costalat V, Bonafe L. Endovascular treatment for acute ischemic stroke at a primary stroke center: First results of the Perpignan center. Rev Neurol (Paris) 2021; 178:377-384. [PMID: 34556344 DOI: 10.1016/j.neurol.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 04/05/2021] [Accepted: 05/17/2021] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Converting a high-volume primary stroke center (PSC) into a stroke center that can perform emergency endovascular treatment (EVT) could reduce the time to thrombectomy. We report the first results of a newly established EVT facility at the Perpignan PSC and their comparison with the targets defined by the established guidelines. PATIENTS AND METHOD For this comprehensive observational study, data of patients with acute ischemic stroke (AIS) due to proximal large vessel occlusion (LVO) and treated by EVT at the Perpignan PSC from December 5, 2019 to September 15, 2020 were extracted from an ongoing prospective database. RESULTS During the study period, 37 patients underwent EVT at the Perpignan PSC. The median (range) symptom-onset to recanalization time was 262min (100-485min). The median (range) intra-hospital times were: 20min (2-58min) for door-to-imaging, 57min (30-155min) for imaging-to-puncture, 55min (15-180min) for puncture-to-recanalization, and 137min (59-319min) for door-to-recanalization. At 3 months post-AIS, the favorable outcome (modified Ranking Score: 0-2) rate was 50% and the mortality rate was 19.4%. These results are comparable to those of previous clinical trials, and meet the targets defined by the current consensus statements for EVT. DISCUSSION AND CONCLUSION Our results show the feasibility and safety of EVT in a PSC for patients with AIS due to LVO. The implementation of this strategy may be important for shortening the time to thrombectomy.
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Affiliation(s)
- D Sablot
- Neurology Department, Perpignan hospital, Perpignan, France; Regional health agency of Occitanie, Montpellier, France.
| | - G Farouil
- Radiology Department, Perpignan hospital, Perpignan, France
| | - F Leibinger
- Intensive care unit, Perpignan hospital, Perpignan, France
| | - L Van Damme
- Neurology Department, Perpignan hospital, Perpignan, France
| | - S Aptel
- Radiology Department, Perpignan hospital, Perpignan, France
| | - B Fadat
- Neurology Department, Perpignan hospital, Perpignan, France
| | - M Tardieu
- Radiology Department, Perpignan hospital, Perpignan, France
| | - A Dutray
- Neurology Department, Perpignan hospital, Perpignan, France
| | - G Gascou
- Neuroradiology Department, University hospital of Montpellier, Montpellier, France
| | - N Olivier
- Neurology Department, Perpignan hospital, Perpignan, France
| | - I Seiller
- Radiology Department, Perpignan hospital, Perpignan, France
| | - L Nguyen Them
- Neurology Department, Perpignan hospital, Perpignan, France
| | - P Smadja
- Radiology Department, Perpignan hospital, Perpignan, France
| | | | - C Arquizan
- Neurology Department, University hospital of Montpellier, Montpellier, France
| | - J Mas
- Neurology Department, Perpignan hospital, Perpignan, France
| | - S Jurici
- Neurology Department, Perpignan hospital, Perpignan, France
| | - A Dumitrana
- Neurology Department, Perpignan hospital, Perpignan, France
| | - A Ferraro
- Neurology Department, Perpignan hospital, Perpignan, France
| | - V Costalat
- Neuroradiology Department, University hospital of Montpellier, Montpellier, France
| | - L Bonafe
- Radiology Department, Perpignan hospital, Perpignan, France; Neuroradiology Department, University hospital of Montpellier, Montpellier, France
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9
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Ezenarro JJ, Ackerman TN, Pelissier P, Combot D, Labbé L, Muñoz-Berbel X, Mas J, Del Campo FJ, Uria N. Integrated Photonic System for Early Warning of Cyanobacterial Blooms in Aquaponics. Anal Chem 2021; 93:722-730. [PMID: 33305581 DOI: 10.1021/acs.analchem.0c00935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyanobacterial blooms produce hazardous toxins, deplete oxygen, and secrete compounds that confer undesirable organoleptic properties to water. To prevent bloom appearance, the World Health Organization has established an alert level between 500 and 2000 cells·mL-1, beyond the capabilities of most optical sensors detecting the cyanobacteria fluorescent pigments. Flow cytometry, cell culturing, and microscopy may reach these detection limits, but they involve both bulky and expensive laboratory equipment or long and tedious protocols. Thus, no current technology allows fast, sensitive, and in situ detection of cyanobacteria. Here, we present a simple, user-friendly, low-cost, and portable photonic system for in situ detection of low cyanobacterial concentrations in water samples. The system integrates high-performance preconcentration elements and optical components for fluorescence measurement of specific cyanobacterial pigments, that is, phycocyanin. Phycocyanin has demonstrated to be more selective to cyanobacteria than other pigments, such as chlorophyll-a, and to present an excellent linear correlation with bacterial concentration from 102 to 104 cell·mL-1 (R2 = 0.99). Additionally, the high performance of the preconcentration system leads to detection limits below 435 cells·mL-1 after 10 min in aquaponic water samples. Due to its simplicity, compactness, and sensitivity, we envision the current technology as a powerful tool for early warning and detection of low pathogen concentrations in water samples.
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Affiliation(s)
- Josune J Ezenarro
- Departament Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.,Waterologies S.L., C/Dinamarca, 3 (nave 9), Polígono Industrial Les Comes, Igualada 08700, Spain
| | - Tobias Nils Ackerman
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Pablo Pelissier
- Pisciculture Expérimentale INRA des Monts d'Arrée, E des Monts d'Arrée, Barrage du Drennec, Sizun 29 450, France
| | - Doriane Combot
- Pisciculture Expérimentale INRA des Monts d'Arrée, E des Monts d'Arrée, Barrage du Drennec, Sizun 29 450, France
| | - Laurent Labbé
- Pisciculture Expérimentale INRA des Monts d'Arrée, E des Monts d'Arrée, Barrage du Drennec, Sizun 29 450, France
| | - Xavier Muñoz-Berbel
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, Bellaterra 08193, Spain
| | - Jordi Mas
- Departament Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Francisco Javier Del Campo
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, Bellaterra 08193, Spain.,Pisciculture Expérimentale INRA des Monts d'Arrée, E des Monts d'Arrée, Barrage du Drennec, Sizun 29 450, France.,BCMaterials, Basque Center for Materials, Applications and Nanostructures. UPV/EHU Science Park, Leioa 48940, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao 48011, Spain
| | - Naroa Uria
- Institut de Microelectrònica de Barcelona, IMB-CNM-CSIC, Campus UAB, Bellaterra 08193, Spain
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10
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Ferrer-Vilanova A, Alonso Y, Dietvorst J, Pérez-Montero M, Rodríguez-Rodríguez R, Ivanova K, Tzanov T, Vigués N, Mas J, Guirado G, Muñoz-Berbel X. Sonochemical coating of Prussian Blue for the production of smart bacterial-sensing hospital textiles. Ultrason Sonochem 2021; 70:105317. [PMID: 32891882 PMCID: PMC7786536 DOI: 10.1016/j.ultsonch.2020.105317] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 07/02/2020] [Accepted: 08/23/2020] [Indexed: 05/22/2023]
Abstract
In healthcare facilities, environmental microbes are responsible for numerous infections leading to patient's health complications and even death. The detection of the pathogens present on contaminated surfaces is crucial, although not always possible with current microbial detection technologies requiring sample collection and transfer to the laboratory. Based on a simple sonochemical coating process, smart hospital fabrics with the capacity to detect live bacteria by a simple change of colour are presented here. Prussian Blue nanoparticles (PB-NPs) are sonochemically coated on polyester-cotton textiles in a single-step requiring 15 min. The presence of PB-NPs confers the textile with an intensive blue colour and with bacterial-sensing capacity. Live bacteria in the textile metabolize PB-NPs and reduce them to colourless Prussian White (PW), enabling in situ detection of bacterial presence in less than 6 h with the bare eye (complete colour change requires 40 h). The smart textile is sensitive to both Gram-positive and Gram-negative bacteria, responsible for most nosocomial infections. The redox reaction is completely reversible and the textile recovers its initial blue colour by re-oxidation with environmental oxygen, enabling its re-use. Due to its simplicity and versatility, the current technology can be employed in different types of materials for control and prevention of microbial infections in hospitals, industries, schools and at home.
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Affiliation(s)
- Amparo Ferrer-Vilanova
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Carrer dels Til·lers s/n, Campus Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Yasmine Alonso
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Jiri Dietvorst
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Carrer dels Til·lers s/n, Campus Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Marta Pérez-Montero
- Basic Sciences Department, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, 08195, Sant Cugat del Vallès, Barcelona, Spain.
| | - Rosalía Rodríguez-Rodríguez
- Basic Sciences Department, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, 08195, Sant Cugat del Vallès, Barcelona, Spain.
| | - Kristina Ivanova
- Universitat Politècnica de Catalunya, Edifici Gaia, Pg. Ernest Lluch/Rambla Sant Nebridi s/n. 08222, Terrassa, Barcelona, Spain.
| | - Tzanko Tzanov
- Universitat Politècnica de Catalunya, Edifici Gaia, Pg. Ernest Lluch/Rambla Sant Nebridi s/n. 08222, Terrassa, Barcelona, Spain.
| | - Núria Vigués
- Departament de Genètica i Microbiologia, Universitat Autonòma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Jordi Mas
- Departament de Genètica i Microbiologia, Universitat Autonòma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Gonzalo Guirado
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
| | - Xavier Muñoz-Berbel
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Carrer dels Til·lers s/n, Campus Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Barcelona, Spain.
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11
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Gabet A, Houot M, Mas J, Gourtay E, Gautier A, Grave C, Olié V. Stroke perception and knowledge of its symptoms in a sample of the general French population. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2020.10.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Ezenarro JJ, Párraga-Niño N, Sabrià M, Del Campo FJ, Muñoz-Pascual FX, Mas J, Uria N. Rapid Detection of Legionella pneumophila in Drinking Water, Based on Filter Immunoassay and Chronoamperometric Measurement. Biosensors (Basel) 2020; 10:bios10090102. [PMID: 32825468 PMCID: PMC7558583 DOI: 10.3390/bios10090102] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/21/2020] [Accepted: 08/12/2020] [Indexed: 12/19/2022]
Abstract
Legionella is a pathogenic bacterium, ubiquitous in freshwater environments and able to colonise man-made water systems from which it can be transmitted to humans during outbreaks. The prevention of such outbreaks requires a fast, low cost, automated and often portable detection system. In this work, we present a combination of sample concentration, immunoassay detection, and measurement by chronoamperometry. A nitrocellulose microfiltration membrane is used as support for both the water sample concentration and the Legionella immunodetection. The horseradish peroxidase enzymatic label of the antibodies permits using the redox substrate 3,3′,5,5′-Tetramethylbenzidine to generate current changes proportional to the bacterial concentration present in drinking water. Carbon screen-printed electrodes are employed in the chronoamperometric measurements. Our system reduces the detection time: from the 10 days required by the conventional culture-based methods, to 2–3 h, which could be crucial to avoid outbreaks. Additionally, the system shows a linear response (R2 value of 0.99), being able to detect a range of Legionella concentrations between 101 and 104 cfu·mL−1 with a detection limit (LoD) of 4 cfu·mL−1.
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Affiliation(s)
- Josune J. Ezenarro
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, E-08193 Cerdanyola, Spain;
- Waterologies S.L, C/Dinamarca, 3 (nave 9), Polígon Industrial Les Comes, E-08700c Igualada, Spain
- Correspondence: (J.J.E.); (N.U.)
| | - Noemí Párraga-Niño
- Unitat de Malalties Infeccioses, Fundació Institut de Investigació Germans Trias I Pujol, E-08916 Badalona, Spain; (N.P.-N.); (M.S.)
| | - Miquel Sabrià
- Unitat de Malalties Infeccioses, Fundació Institut de Investigació Germans Trias I Pujol, E-08916 Badalona, Spain; (N.P.-N.); (M.S.)
| | - Fancisco Javier Del Campo
- Institut de Microelectrònica de Barcelona, CNM-CSIC, Esfera UAB-CEI, Campus Nord UAB, E-08193 Bellaterra, Spain; (F.J.D.C.); (F.-X.M.-P.)
- IKERBASQUE, Basque Foundation for Science, E-48013 Bilbao, Spain
| | - Francesc-Xavier Muñoz-Pascual
- Institut de Microelectrònica de Barcelona, CNM-CSIC, Esfera UAB-CEI, Campus Nord UAB, E-08193 Bellaterra, Spain; (F.J.D.C.); (F.-X.M.-P.)
| | - Jordi Mas
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, E-08193 Cerdanyola, Spain;
| | - Naroa Uria
- Institut de Microelectrònica de Barcelona, CNM-CSIC, Esfera UAB-CEI, Campus Nord UAB, E-08193 Bellaterra, Spain; (F.J.D.C.); (F.-X.M.-P.)
- Correspondence: (J.J.E.); (N.U.)
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13
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Rajnovic D, Mas J. Fluorometric detection of phages in liquid media: Application to turbid samples. Anal Chim Acta 2020; 1111:23-30. [DOI: 10.1016/j.aca.2020.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/21/2020] [Accepted: 03/07/2020] [Indexed: 02/07/2023]
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14
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Vigués N, Pujol-Vila F, Macanás J, Muñoz M, Muñoz-Berbel X, Mas J. Fast fabrication of reusable polyethersulfone microbial biosensors through biocompatible phase separation. Talanta 2020; 206:120192. [PMID: 31514850 DOI: 10.1016/j.talanta.2019.120192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/18/2019] [Accepted: 07/28/2019] [Indexed: 10/26/2022]
Abstract
In biosensors fabrication, entrapment in polymeric matrices allows efficient immobilization of the biorecognition elements without compromising their structure and activity. When considering living cells, the biocompatibility of both the matrix and the polymerization procedure are additional critical factors. Bio-polymeric gels (e.g. alginate) are biocompatible and polymerize under mild conditions, but they have poor stability. Most synthetic polymers (e.g. PVA), on the other hand, present improved stability at the expense of complex protocols involving chemical/physical treatments that decrease their biological compatibility. In an attempt to explore new solutions to this problem we have developed a procedure for the immobilization of bacterial cells in polyethersulfone (PES) using phase separation. The technology has been tested successfully in the construction of a bacterial biosensor for toxicity assessment. Biosensors were coated with a 300 μm bacteria-containing PES membrane, using non-solvent induced phase separation (membrane thickness ≈ 300 μm). With this method, up to 2.3 × 106 cells were immobilized in the electrode surface with an entrapment efficiency of 8.2%, without compromising cell integrity or viability. Biosensing was performed electrochemically through ferricyanide respirometry, with metabolically-active entrapped bacteria reducing ferricyanide in the presence of glucose. PES biosensors showed good stability and reusability during dry frozen storage for up to 1 month. The analytical performance of the sensors was assessed carrying out a toxicity assay in which 3,5-dichlorophenol (DCP) was used as a model toxic compound. The biosensor provided a concentration-dependent response to DCP with half-maximal effective concentration (EC50) of 9.2 ppm, well in agreement with reported values. This entrapment methodology is susceptible of mass production and allows easy and repetitive production of robust and sensitive bacterial biosensors.
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Affiliation(s)
- N Vigués
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain.
| | - F Pujol-Vila
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - J Macanás
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, Spain
| | - M Muñoz
- Department of Chemistry, Universitat Autònoma de Barcelona, UAB, Spain
| | - X Muñoz-Berbel
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
| | - J Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
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15
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Rubio E, Alejo-Cancho I, Aylagas C, Camprubí D, Ferré R, Albarracín MR, Gonzalo V, Barrachina J, Álvarez-Martínez MJ, Valls ME, Mas J, Vila J, Losada I, Martínez MJ, Casals-Pascual C. Diagnostic Value of Platelet and Leukocyte Counts in the Differential Diagnosis of Fever in the Returning Traveler. Am J Trop Med Hyg 2019; 100:470-475. [PMID: 30526735 DOI: 10.4269/ajtmh.18-0736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Malaria, arbovirus infection and travelers' diarrhea are among the most common etiologies of fever after a stay in the tropics. Because the initial symptoms of these diseases often overlap, the differential diagnostic remains a challenge. The aim of this study was to establish the effectiveness of platelet and leukocyte counts in the differential diagnosis of fever in the returning traveler. Between 2013 and 2016, patients with a clinical suspicion of malaria, who had thick blood smears performed were retrospectively included. The microbiological etiology of each episode was established based on molecular detection in the case of arbovirus infection, the detection of pathogens in stool samples for diarrhea and other gastrointestinal symptoms and the thick and thin blood smear results for malaria. A total of 1,218 episodes were included. Malaria, arbovirus infection, and diarrhea and other gastrointestinal symptoms caused 102 (8.4%), 68 (5.6%), and 72 (5.9%) episodes, respectively. The median platelet counts in malaria episodes were 89 × 109/L and thrombocytopenia (< 150,000 × 109 platelets/L) yielded a 98% negative predictive value to predict malaria. The median leukocyte counts in arbovirus infection episodes were 3.19 × 109/L and leucopenia (< 4 × 109 leukocytes/L) yielded a 97.9% negative predictive value to predict arbovirus infections. Platelet and leukocyte counts were not significantly altered in episodes caused by diarrhea and other gastrointestinal symptoms. Initial platelet and leukocyte counts might be useful for the clinical differential diagnosis of fever in the returning traveler. Although these results are insufficient to establish a diagnosis, they should be considered in the initial clinical assessment.
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Affiliation(s)
- Elisa Rubio
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | | | - Cristian Aylagas
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Daniel Camprubí
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Tropical Medicine and International Health, Hospital Clinic, Barcelona, Spain
| | - Roser Ferré
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | | | - Verónica Gonzalo
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Josep Barrachina
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Míriam José Álvarez-Martínez
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | | | - Jordi Mas
- Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Jordi Vila
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Irene Losada
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Tropical Medicine and International Health, Hospital Clinic, Barcelona, Spain
| | - Miguel J Martínez
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
| | - Climent Casals-Pascual
- ISGlobal Barcelona Institute for Global Health, Barcelona, Spain.,Department of Clinical Microbiology, Hospital Clinic, Barcelona, Spain
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16
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Abstract
Since 1959 with the proposal of Double Agar Layer (DAL) method for phage detection and quantification, many sophisticated methods have emerged meanwhile. However, many of them are either too complex/expensive or insensitive to replace routine utilization of DAL method in clinical, environmental and industrial environments. For that purpose, we have explored an alternative method for the detection and quantification of bacteriophages that fulfills the criteria of being rapid, simple and inexpensive. In this paper we have developed a method based on the analysis of optical density kinetics in bacterial cultures exposed to phage-containing samples. Although the decrease in optical density caused by cell lysis was one of the first observable consequences of the effect of viral infection in bacterial cultures, the potential of the method for the assessment of phage abundance has never been fully exploited. In this work we carry out a detailed study of optical density kinetics in phage-infected bacterial cultures, as a function of both, phage abundance and initial concentration of the host organisms. In total, 90 different combinations of bacteria/phage concentrations have been used. The data obtained provide valuable information about sensitivity ranges, duration of the assay, percentages of inhibition and type of lysing behavior for each phage concentration. The method described can detect, as few as 10 phage particles per assay volume after a phage incubation period of 3.5h. The duration of the assay can be shortened to 45min at the expense of losing sensitivity and increasing the limit of detection to 108 pfu/ml. Despite using non-sophisticated technology, the method described has shown sensitivity and response time comparable to other high-end methods. The simplicity of the technology and of the analytical steps involved, make the system susceptible of miniaturization and automation for high-throughput applications which can be implemented in routine analysis in many environments.
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Affiliation(s)
- Denis Rajnovic
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Edifici C. Campus de Bellaterra, Cerdanyola del Vallès, Barcelona, Spain
- * E-mail: (DR); (JM)
| | - Xavier Muñoz-Berbel
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Cerdanyola del Vallès, Barcelona, Spain
| | - Jordi Mas
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Edifici C. Campus de Bellaterra, Cerdanyola del Vallès, Barcelona, Spain
- * E-mail: (DR); (JM)
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17
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Vigués N, Pujol-Vila F, Marquez-Maqueda A, Muñoz-Berbel X, Mas J. Electro-addressable conductive alginate hydrogel for bacterial trapping and general toxicity determination. Anal Chim Acta 2018; 1036:115-120. [DOI: 10.1016/j.aca.2018.06.062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/15/2018] [Accepted: 06/22/2018] [Indexed: 01/01/2023]
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18
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Laynez-Roldán P, Martínez-de la Puente J, Montalvo T, Mas J, Muñoz J, Figuerola J, Rodriguez-Valero N. Two cases of subcutaneous dirofilariasis in Barcelona, Spain. Parasitol Res 2018; 117:3679-3681. [DOI: 10.1007/s00436-018-6098-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/26/2018] [Indexed: 10/28/2022]
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19
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Mata F, Losa F, Camacho L, Fernandez Trigo V, Barrios P, Mas J. Peripheral Primitive Neuroectodermal Tumor (Ppnet) of Pelvic Origin: Report of a Case Arising from an Unusual Location. Tumori 2018; 87:109-11. [PMID: 11401207 DOI: 10.1177/030089160108700209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A peripheral primitive neuroectodermal tumor arising from the abdominopelvic cavity is reported in a 24-year-old young male without any previous remarkable pathology. He was admitted to our hospital with complaints of urinary symptoms (acute urinary retention) and mild intestinal occlusion that had been present for three months. Physical examination and CT scan revealed a pelvic mass occupying the entire pelvic cavity. The diagnostic workup included a CT-guided biopsy which defined the tumor as a sarcomatous type. Radical surgery was performed including tumor resection, pelvic exenteration (bladder and prostate gland) and urinary and fecal diversion. Adjuvant chemotherapy (VAIA) was delivered once the histology was confirmed. We reviewed the available literature focusing on the varied nomenclature of this tumor (peripheral neuroepithelioma, Askin's tumor, Ewing's extraosseous tumor, peripheral adult neuroblastoma, peripheral primitive extracranial neuroectodermal tumor (PPNET), the clinical features, the role of diagnostic imaging techniques, pathologic assessment and controversial therapeutic management. In addition, the prognosis and survival of this rare condition were analyzed.
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Affiliation(s)
- F Mata
- Surgical Oncology Unit, Consorcio Hospital Cruz Roja de Hospitalet de Llobregat, Barcelona, Spain
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Uria N, Ferrera I, Mas J. Electrochemical performance and microbial community profiles in microbial fuel cells in relation to electron transfer mechanisms. BMC Microbiol 2017; 17:208. [PMID: 29047333 PMCID: PMC5648455 DOI: 10.1186/s12866-017-1115-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 10/13/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Microbial fuel cells (MFCs) operating with complex microbial communities have been extensively reported in the past, and are commonly used in applications such as wastewater treatment, bioremediation or in-situ powering of environmental sensors. However, our knowledge on how the composition of the microbial community and the different types of electron transfer to the anode affect the performance of these bioelectrochemical systems is far from complete. To fill this gap of knowledge, we designed a set of three MFCs with different constrains limiting direct and mediated electron transfer to the anode. RESULTS The results obtained indicate that MFCs with a naked anode on which a biofilm was allowed unrestricted development (MFC-A) had the most diverse archaeal and bacterial community, and offered the best performance. In this MFC both, direct and mediated electron transfer, occurred simultaneously, but direct electron transfer was the predominant mechanism. Microbial fuel cells in which the anode was enclosed in a dialysis membrane and biofilm was not allowed to develop (MFC-D), had a much lower power output (about 60% lower), and a prevalence of dissolved redox species that acted as putative electron shuttles. In the anolyte of this MFC, Arcobacter and Methanosaeta were the prevalent bacteria and archaea respectively. In the third MFC, in which the anode had been covered by a cation selective nafion membrane (MFC-N), power output decreased a further 5% (95% less than MFC-A). In this MFC, conventional organic electron shuttles could not operate and the low power output obtained was presumably attributed to fermentation end-products produced by some of the organisms present in the anolyte, probably Pseudomonas or Methanosaeta. CONCLUSION Electron transfer mechanisms have an impact on the development of different microbial communities and in turn on MFC performance. Although a stable current was achieved in all cases, direct electron transfer MFC showed the best performance concluding that biofilms are the major contributors to current production in MFCs. Characterization of the complex microbial assemblages in these systems may help us to unveil new electrogenic microorganisms and improve our understanding on their role to the functioning of MFCs.
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Affiliation(s)
- Naroa Uria
- Departament de Micro-Nano Sistemes, Institut de Microelectrònica de Barcelona (IMB-CNM), CSIC, Bellaterra, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Isabel Ferrera
- Departament de Biologia Marina i Oceanografia, Institut de Ciències del Mar (ICM), CSIC, Barcelona, Spain
| | - Jordi Mas
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
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21
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Pujol-Vila F, Dietvorst J, Gall-Mas L, Díaz-González M, Vigués N, Mas J, Muñoz-Berbel X. Bioelectrochromic hydrogel for fast antibiotic-susceptibility testing. J Colloid Interface Sci 2017; 511:251-258. [PMID: 29028576 DOI: 10.1016/j.jcis.2017.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/01/2017] [Accepted: 09/01/2017] [Indexed: 10/18/2022]
Abstract
Materials science offers new perspectives in the clinical analysis of antimicrobial sensitivity. However, a biomaterial with the capacity to respond to living bacteria has not been developed to date. We present an electrochromic iron(III)-complexed alginate hydrogel sensitive to bacterial metabolism, here applied to fast antibiotic-susceptibility determination. Bacteria under evaluation are entrapped -and pre-concentrated- in the hydrogel matrix by oxidation of iron (II) ions to iron (III) and in situ formation of the alginate hydrogel in less than 2min and in soft experimental conditions (i.e. room temperature, pH 7, aqueous solution). After incubation with the antibiotic (10min), ferricyanide is added to the biomaterial. Bacteria resistant to the antibiotic dose remain alive and reduce ferricyanide to ferrocyanide, which reacts with the iron (III) ions in the hydrogel to produce Prussian Blue molecules. For a bacterial concentration above 107 colony forming units per mL colour development is detectable with the bare eye in less than 20min. The simplicity, sensitivity, low-cost and short response time of the biomaterial and the assay envisages a high impact of these approaches on sensitive sectors such as public health system, food and beverage industries or environmental monitoring.
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Affiliation(s)
- Ferran Pujol-Vila
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain.
| | - Jiri Dietvorst
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
| | - Laura Gall-Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - María Díaz-González
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
| | - Núria Vigués
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - Jordi Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona (UAB), Bellaterra, Barcelona, Spain
| | - Xavier Muñoz-Berbel
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Bellaterra, Barcelona, Spain
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Gómez-Junyent J, Pinazo MJ, Castro P, Fernández S, Mas J, Chaguaceda C, Pellicé M, Gascón J, Muñoz J. Human African Trypanosomiasis in a Spanish traveler returning from Tanzania. PLoS Negl Trop Dis 2017; 11:e0005324. [PMID: 28358876 PMCID: PMC5373517 DOI: 10.1371/journal.pntd.0005324] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Joan Gómez-Junyent
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
- * E-mail:
| | - María Jesús Pinazo
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
| | - Pedro Castro
- Medical Intensive Care Unit, Hospital Clínic, IDIPABS, Universitat de Barcelona, Barcelona, Spain
| | - Sara Fernández
- Medical Intensive Care Unit, Hospital Clínic, IDIPABS, Universitat de Barcelona, Barcelona, Spain
| | - Jordi Mas
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
| | - Cristian Chaguaceda
- Pharmacy Department, Hospital Clínic, IDIBAPS, Universitat de Barcelona, Barcelona, Spain
| | - Martina Pellicé
- Medical Intensive Care Unit, Hospital Clínic, IDIPABS, Universitat de Barcelona, Barcelona, Spain
| | - Joaquim Gascón
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
| | - José Muñoz
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
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Sablot D, Gaillard N, Colas C, Smadja P, Gely C, Dutray A, Bonnec JM, Jurici S, Farouil G, Ferraro-Allou A, Jantac M, Allou T, Pujol C, Olivier N, Laverdure A, Fadat B, Mas J, Dumitrana A, Garcia Y, Touzani H, Perucho P, Moulin T, Richard C, Heroum C, Bouly S, Sagnes-Raffy C, Heve D. Results of a 1-year quality-improvement process to reduce door-to-needle time in acute ischemic stroke with MRI screening. Rev Neurol (Paris) 2017; 173:47-54. [PMID: 28131535 DOI: 10.1016/j.neurol.2016.12.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/20/2016] [Accepted: 12/20/2016] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To determine the effects of a 1-year quality-improvement (QI) process to reduce door-to-needle (DTN) time in a secondary general hospital in which multimodal MRI screening is used before tissue plasminogen activator (tPA) administration in patients with acute ischemic stroke (AIS). METHODS The QI process was initiated in January 2015. Patients who received intravenous (iv) tPA<4.5h after AIS onset between 26 February 2015 to 25 February 2016 (during implementation of the QI process; the "2015 cohort") were identified (n=130), and their demographic and clinical characteristics and timing metrics compared with those of patients treated by iv tPA in 2014 (the "2014 cohort", n=135). RESULTS Of the 130 patients in the 2015 cohort, 120 (92.3%) of them were screened by MRI. The median DTN time was significantly reduced by 30% (from 84min in 2014 to 59min; P<0.003), while the proportion of treated patients with a DTN time≤60min increased from 21% to 52% (P<0.0001). Demographic and baseline characteristics did not significantly differ between cohorts, and the improvement in DTN time was associated with better outcomes after discharge (patients with a 0-2 score on the modified rankin scale: 59% in the 2015 cohort vs 42.4% in the 2014 cohort; P<0.01). During the 1-year QI process, the median DTN time decreased by 15% (from 65min in the first trimester to 55min in the last trimester; P≤0.04) with a non-significant 1.5-fold increase in the proportion of treated patients with a DTN time≤60min (from 41% to 62%; P=0.09). CONCLUSION It is feasible to deliver tPA to patients with AIS within 60min in a general hospital, using MRI as the routine screening modality, making this QI process to reduce DTN time widely applicable to other secondary general hospitals.
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Affiliation(s)
- D Sablot
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France; Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France.
| | - N Gaillard
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Colas
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - P Smadja
- Service de radiologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Gely
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Dutray
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - J-M Bonnec
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - S Jurici
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - G Farouil
- Service de radiologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Ferraro-Allou
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - M Jantac
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - T Allou
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - C Pujol
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - N Olivier
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Laverdure
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - B Fadat
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - J Mas
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - A Dumitrana
- Service de neurologie, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - Y Garcia
- Service d'accueil des urgences/SMUR 66, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - H Touzani
- Service de neurologie, centre hospitalier, boulevard Dr-Lacroix, 11100 Narbonne, France
| | - P Perucho
- Service de la qualité, centre hospitalier Saint-Jean, 20, avenue du Languedoc, BP 4052, 66046 Perpignan, France
| | - T Moulin
- Service de neurologie, CHU Minjoz, 3, boulevard A-Flemming, 25030 Besançon, France
| | - C Richard
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - C Heroum
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - S Bouly
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - C Sagnes-Raffy
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
| | - D Heve
- Agence régionale de santé Languedoc-Roussillon et Midi-Pyrénées (ARS-LRMP), 28, parc club du Millénaire, 1025, avenue Henri-Becquerel, 34067 Montpellier, France
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Alonso A, Vigués N, Rodríguez-Rodríguez R, Borrisé X, Muñoz M, Muraviev DN, Mas J, Muñoz-Berbel X. Self-oriented Ag-based polycrystalline cubic nanostructures through polymer stabilization. Nanotechnology 2016; 27:425603. [PMID: 27631422 DOI: 10.1088/0957-4484/27/42/425603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper presents the study of the dynamics of the formation of polymer-assisted highly-orientated polycrystalline cubic structures (CS) by a fractal-mediated mechanism. This mechanism involves the formation of seed Ag@Co nanoparticles by InterMatrix Synthesis and subsequent overgrowth after incubation at a low temperature in chloride and phosphate solutions. These ions promote the dissolution and recrystallization in an ordered configuration of pre-synthetized nanoparticles initially embedded in negatively-charged polymeric matrices. During recrystallization, silver ions aggregate in AgCl@Co fractal-like structures, then evolve into regular polycrystalline solid nanostructures (e.g. CS) in a single crystallization step on specific regions of the ion exchange resin (IER) which maintain the integrity of polycrystalline nanocubes. Here, we study the essential role of the IER in the formation of these CS for the maintenance of their integrity and stability. Thus, this synthesis protocol may be easily expanded to the composition of other nanoparticles providing an interesting, cheap and simple alternative for cubic structure formation and isolation.
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Affiliation(s)
- Amanda Alonso
- Chemical, Biological and Environmental Engineering Department, Escola d'Enginyeria, Universitat Autònoma de Barcelona, E-08193, Campus UAB, Cerdanyola del Vallés, Barcelona, Spain
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Pujol-Vila F, Vigués N, Guerrero-Navarro A, Jiménez S, Gómez D, Fernández M, Bori J, Vallès B, Riva M, Muñoz-Berbel X, Mas J. Paper-based chromatic toxicity bioassay by analysis of bacterial ferricyanide reduction. Anal Chim Acta 2016; 910:60-7. [DOI: 10.1016/j.aca.2016.01.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/21/2015] [Accepted: 01/03/2016] [Indexed: 11/25/2022]
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Mallén-Alberdi M, Vigués N, Mas J, Fernández-Sánchez C, Baldi A. Impedance spectral fingerprint of E. coli cells on interdigitated electrodes: A new approach for label free and selective detection. Sensing and Bio-Sensing Research 2016. [DOI: 10.1016/j.sbsr.2016.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Márquez-Maqueda A, Ríos-Gallardo J, Vigués N, Pujol F, Díaz-González M, Mas J, Jiménez-Jorquera C, Domínguez C, Muñoz-Berbel X. Enzymatic Biosensors Based on Electrodeposited Alginate Hydrogels. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.proeng.2016.11.229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bastos-Arrieta J, Muñoz J, Vigués N, Muraviev DN, Céspedes F, Mas J, Baeza M, Muñoz M. Intermatrix synthesis of Ag, AgAu and Au nanoparticles by the galvanic replacement strategy for bactericidal and electrocatalytically active nanocomposites. NEW J CHEM 2016. [DOI: 10.1039/c6nj02468h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanocomposites with a tuned distribution of nanoparticles for water treatment and electrochemical assays are prepared by the intermatrix synthesis technique.
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Affiliation(s)
- Julio Bastos-Arrieta
- Departament d'Enginyeria Química
- Universitat Politècnica de Catalunya (UPC)
- Campus Diagonal Besòs
- Edificio C (EEBE). Carrer Eduard Maristany
- Barcelona
| | - Jose Muñoz
- Molecular Nanoscience and Organic Materials Group
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Campus UAB
- 08193 Bellaterra
- Spain
| | - Núria Vigués
- Department of Genetics and Microbiology
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
- Spain
| | - Dmitri N. Muraviev
- Departament de Química
- Facultat de Ciències
- Edifici C-Nord
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
| | - Francisco Céspedes
- Departament de Química
- Facultat de Ciències
- Edifici C-Nord
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
| | - Jordi Mas
- Department of Genetics and Microbiology
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
- Spain
| | - Mireia Baeza
- Departament de Química
- Facultat de Ciències
- Edifici C-Nord
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
| | - Maria Muñoz
- Departament de Química
- Facultat de Ciències
- Edifici C-Nord
- Universitat Autònoma de Barcelona
- 08193 Cerdanyola del Vallès (Bellaterra)
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Domènech B, Ziegler K, Vigués N, Olszewski W, Marini C, Mas J, Muñoz M, Muraviev DN, Macanás J. Polyurethane foams doped with stable silver nanoparticles as bactericidal and catalytic materials for the effective treatment of water. NEW J CHEM 2016. [DOI: 10.1039/c5nj03202d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reusable dual-purpose nanocomposite foams with AgNPs showed high stability even after 2 years of storage.
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Affiliation(s)
- Berta Domènech
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
- 08193 Bellaterra
- Spain
| | - Kharla Ziegler
- Department of Chemistry
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Núria Vigués
- Department of Genetics and Microbiology
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Wojciech Olszewski
- ALBA Synchrotron Light Source
- 08290 Cerdanyola del Vallès
- Spain
- Faculty of Physics
- University of Bialystok
| | - Carlo Marini
- ALBA Synchrotron Light Source
- 08290 Cerdanyola del Vallès
- Spain
| | - Jordi Mas
- Department of Genetics and Microbiology
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Maria Muñoz
- Department of Chemistry
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Dmitri N. Muraviev
- Department of Chemistry
- Universitat Autònoma de Barcelona
- 08193 Bellaterra
- Spain
| | - Jorge Macanás
- Department of Chemical Engineering
- Universitat Politècnica de Catalunya
- Terrassa
- Spain
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Fisch U, von Felten S, Roubin G, Mali W, Jansen O, Howard G, Fraederich G, Chatellier G, Becquemin J, Algra A, Ringleb P, Mas J, Brown M, Brott T, Bonati L. Low Risk of Stroke or Death among Patients with Recently Symptomatic Carotid Stenosis Awaiting Revascularization—A Pooled Analysis of Recent Randomized Trials. J Neurol Surg A Cent Eur Neurosurg 2015. [DOI: 10.1055/s-0035-1564535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Sanahuja D, Giménez-Gómez P, Vigués N, Ackermann TN, Guerrero-Navarro AE, Pujol-Vila F, Sacristán J, Santamaria N, Sánchez-Contreras M, Díaz-González M, Mas J, Muñoz-Berbel X. Microbial trench-based optofluidic system for reagentless determination of phenolic compounds. Lab Chip 2015; 15:1717-1726. [PMID: 25669844 DOI: 10.1039/c4lc01446d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Phenolic compounds are one of the main contaminants of soil and water due to their toxicity and persistence in the natural environment. Their presence is commonly determined with bulky and expensive instrumentation (e.g. chromatography systems), requiring sample collection and transport to the laboratory. Sample transport delays data acquisition, postponing potential actions to prevent environmental catastrophes. This article presents a portable, miniaturized, robust and low-cost microbial trench-based optofluidic system for reagentless determination of phenols in water. The optofluidic system is composed of a poly(methyl methacrylate) structure, incorporating polymeric optical elements and miniaturized discrete auxiliary components for optical transduction. An electronic circuit, adapted from a lock-in amplifier, is used for system control and interfering ambient light subtraction. In the trench, genetically modified bacteria are stably entrapped in an alginate hydrogel for quantitative determination of model phenol catechol. Alginate is also acting as a diffusion barrier for compounds present in the sample. Additionally, the superior refractive index of the gel (compared to water) confines the light in the lower level of the chip. Hence, the optical readout of the device is only altered by changes in the trench. Catechol molecules (colorless) in the sample diffuse through the alginate matrix and reach bacteria, which degrade them to a colored compound. The absorbance increase at 450 nm reports the presence of catechol simply, quickly (~10 min) and quantitatively without addition of chemical reagents. This miniaturized, portable and robust optofluidic system opens the possibility for quick and reliable determination of environmental contamination in situ, thus mitigating the effects of accidental spills.
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Affiliation(s)
- David Sanahuja
- Department of Genetics and Microbiology Universitat Autonòma de Barcelona (UAB), Bellaterra, Barcelona, Spain
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Brosel-Oliu S, Abramova N, Bratov A, Vigués N, Mas J, Muñoz FX. Sensitivity and Response Time of Polyethyleneimine Modified Impedimetric Transducer for Bacteria Detection. ELECTROANAL 2015. [DOI: 10.1002/elan.201400575] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ferrera I, Mas J, Taberna E, Sanz J, Sánchez O. Biological support media influence the bacterial biofouling community in reverse osmosis water reclamation demonstration plants. Biofouling 2015; 31:173-180. [PMID: 25706000 DOI: 10.1080/08927014.2015.1012640] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The diversity of the bacterial community developed in different stages of two reverse osmosis (RO) water reclamation demonstration plants designed in a wastewater treatment plant (WWTP) in Tarragona (Spain) was characterized by applying 454-pyrosequencing of the 16S rRNA gene. The plants were fed by secondary treated effluent to a conventional pretreatment train prior to the two-pass RO system. Plants differed in the material used in the filtration process, which was sand in one demonstration plant and Scandinavian schists in the second plant. The results showed the presence of a highly diverse and complex community in the biofilms, mainly composed of members of the Betaproteobacteria and Bacteroidetes in all stages, with the presence of some typical wastewater bacteria, suggesting a feed water origin. Community similarities analyses revealed that samples clustered according to filter type, highlighting the critical influence of the biological supporting medium in biofilm community structure.
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Affiliation(s)
- Isabel Ferrera
- a Departament de Biologia Marina i Oceanografia , Institut de Ciències del Mar, ICM-CSIC , Barcelona , Spain
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Alonso A, Vigués N, Rodríguez-Rodríguez R, Borrisé X, Muñoz M, Muraviev DN, Mas J, Muñoz-Berbel X. Activity-tunable nanocomposites based on dissolution and in situ recrystallization of nanoparticles on ion exchange resins. RSC Adv 2015. [DOI: 10.1039/c5ra16081b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work proposes the use of cationic ion exchange resins as a platform for in situ formation and recrystallization of nanoparticles as a way to dynamically modulate their activity by changing their structure/composition.
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Affiliation(s)
- Amanda Alonso
- Chemical Engineering Department
- Escola d'Enginyeria
- Universitat Autònoma de Barcelona
- UAB
- Spain
| | | | | | - Xavier Borrisé
- Institut Català de Nanociencia i Nanotecnología (ICN2)
- Spain
| | | | | | - Jordi Mas
- Department of Genetics and Microbiology
- UAB
- Spain
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Morató J, Codony F, Sánchez O, Pérez LM, García J, Mas J. Key design factors affecting microbial community composition and pathogenic organism removal in horizontal subsurface flow constructed wetlands. Sci Total Environ 2014; 481:81-89. [PMID: 24594738 DOI: 10.1016/j.scitotenv.2014.01.068] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 01/13/2014] [Accepted: 01/19/2014] [Indexed: 06/03/2023]
Abstract
Constructed wetlands constitute an interesting option for wastewater reuse since high concentrations of contaminants and pathogenic microorganisms can be removed with these natural treatment systems. In this work, the role of key design factors which could affect microbial removal and wetland performance, such as granular media, water depth and season effect was evaluated in a pilot system consisting of eight parallel horizontal subsurface flow (HSSF) constructed wetlands treating urban wastewater from Les Franqueses del Vallès (Barcelona, Spain). Gravel biofilm as well as influent and effluent water samples of these systems were taken in order to detect the presence of bacterial indicators such as total coliforms (TC), Escherichia coli, fecal enterococci (FE), Clostridium perfringens, and other microbial groups such as Pseudomonas and Aeromonas. The overall microbial inactivation ratio ranged between 1.4 and 2.9 log-units for heterotrophic plate counts (HPC), from 1.2 to 2.2 log units for total coliforms (TC) and from 1.4 to 2.3 log units for E. coli. The presence of fine granulometry strongly influenced the removal of all the bacterial groups analyzed. This effect was significant for TC (p=0.009), E. coli (p=0.004), and FE (p=0.012). Shallow HSSF constructed wetlands were more effective for removing Clostridium spores (p=0.039), and were also more efficient for removing TC (p=0.011) and E. coli (p=0.013) when fine granulometry was used. On the other hand, changes in the total bacterial community from gravel biofilm were examined by using denaturing gradient gel electrophoresis (DGGE) and sequencing of polymerase chain reaction (PCR)-amplified fragments of the 16S rRNA gene recovered from DGGE bands. Cluster analysis of the DGGE banding pattern from the different wetlands showed that microbial assemblages separated according to water depth, and sequences of different phylogenetic groups, such as Alpha, Beta and Delta-Proteobacteria, Nitrospirae, Bacteroidetes, Acidobacteria, Firmicutes, Synergistetes and Deferribacteres could be retrieved from DGGE bands.
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Affiliation(s)
- Jordi Morató
- Laboratory of Health and Environmental Microbiology, Department of Optics and Optometry, AquaSost-UNESCO Chair on Sustainability, Technical University of Catalonia, c/Violinista Vellsolà, 37, 08222 Terrassa, Barcelona, Spain.
| | - Francesc Codony
- Laboratory of Health and Environmental Microbiology, Department of Optics and Optometry, AquaSost-UNESCO Chair on Sustainability, Technical University of Catalonia, c/Violinista Vellsolà, 37, 08222 Terrassa, Barcelona, Spain
| | - Olga Sánchez
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Leonardo Martín Pérez
- Laboratory of Health and Environmental Microbiology, Department of Optics and Optometry, AquaSost-UNESCO Chair on Sustainability, Technical University of Catalonia, c/Violinista Vellsolà, 37, 08222 Terrassa, Barcelona, Spain; Rosario Chemical Institute (IQUIR-CONICET, UNR), Faculty of Biochemical and Pharmacological Sciences, National University of Rosario, Suipacha 531, 2000 Rosario, Santa Fe, Argentine
| | - Joan García
- GEMMA-Group of Environmental Engineering and Microbiology, Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya-BarcelonaTech, c/Jordi Girona, 1-3, Building D1, E-08034 Barcelona, Spain
| | - Jordi Mas
- Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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Adrados B, Sánchez O, Arias CA, Becares E, Garrido L, Mas J, Brix H, Morató J. Microbial communities from different types of natural wastewater treatment systems: vertical and horizontal flow constructed wetlands and biofilters. Water Res 2014; 55:304-312. [PMID: 24631879 DOI: 10.1016/j.watres.2014.02.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 02/01/2014] [Accepted: 02/03/2014] [Indexed: 06/03/2023]
Abstract
The prokaryotic microbial communities (Bacteria and Archaea) of three different systems operating in Denmark for the treatment of domestic wastewater (horizontal flow constructed wetlands (HFCW), vertical flow constructed wetlands (VFCW) and biofilters (BF)) was analysed using endpoint PCR followed by Denaturing Gradient Gel Electrophoresis (DGGE). Further sequencing of the most representative bacterial bands revealed that diverse and distinct bacterial communities were found in each system unit, being γ-Proteobacteria and Bacteroidetes present mainly in all of them, while Firmicutes was observed in HFCW and BF. Members of the Actinobacteria group, although found in HFCW and VFCW, seemed to be more abundant in BF units. Finally, some representatives of α, β and δ-Proteobacteria, Acidobacteria and Chloroflexi were also retrieved from some samples. On the other hand, a lower archaeal diversity was found in comparison with the bacterial population. Cluster analysis of the DGGE bacterial band patterns showed that community structure was related to the design of the treatment system and the organic matter load, while no clear relation was established between the microbial assemblage and the wastewater influent.
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Affiliation(s)
- B Adrados
- Health and Environmental Microbiology Laboratory, Optics and Optometry Department & AQUASOST - UNESCO Chair on Sustainability, Universitat Politècnica de Catalunya, Edifici Gaia, Pg. Ernest Lluch/Rambla Sant Nebridi, Terrassa 08222, Spain.
| | - O Sánchez
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - C A Arias
- Aarhus University, Department of Bioscience, Ole Worms Allé 1, Building 1135, 8000 Århus C, Denmark
| | - E Becares
- Facultad de Ciencias Biológicas y Ambientales, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain
| | - L Garrido
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - J Mas
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - H Brix
- Aarhus University, Department of Bioscience, Ole Worms Allé 1, Building 1135, 8000 Århus C, Denmark
| | - J Morató
- Health and Environmental Microbiology Laboratory, Optics and Optometry Department & AQUASOST - UNESCO Chair on Sustainability, Universitat Politècnica de Catalunya, Edifici Gaia, Pg. Ernest Lluch/Rambla Sant Nebridi, Terrassa 08222, Spain
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Zboromyrska Y, Hurtado JC, Salvador P, Alvarez-Martínez MJ, Valls ME, Mas J, Marcos MA, Gascón J, Vila J. Aetiology of traveller's diarrhoea: evaluation of a multiplex PCR tool to detect different enteropathogens. Clin Microbiol Infect 2014; 20:O753-9. [PMID: 24621195 DOI: 10.1111/1469-0691.12621] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/07/2014] [Accepted: 03/10/2014] [Indexed: 12/13/2022]
Abstract
Traveller's diarrhoea (TD) is the most common illness reported in international travellers. TD is caused by a wide range of pathogens, including bacteria, viruses and parasites. Multiplex PCR assays can be especially useful for studying the aetiology of TD. The first objective of this study was to evaluate the utility of the commercially available multiplex PCR (xTAG(®) Gastrointestinal Pathogen Panel (GPP)) for the diagnosis of TD. A total of 185 stool specimens obtained from 174 patients were processed using the GPP assay. This test detected 86 pathogens in 67 stool samples (67/185, 36.2%). Sixteen pathogens out of 86 were also detected by routine testing. The remaining pathogens (n = 70) required further confirmation by alternative techniques. Finally, 60 out of 70 pathogens were confirmed. The second objective of this study was to analyse the aetiology of TD based on the results obtained by the GPP test and routine methods. The primary pathogens causing TD were Shigella (24.2%) followed by enterotoxigenic Escherichia coli (ETEC) (23.2%), enteroaggregative E. coli (14.7%) and Giardia (13.7%). Significant regional differences were observed for ETEC with 19.4% of TD cases acquired in Africa, 11.3% in Asia and none in South Central (SC) America (p 0.01), Giardia was found in 1.5% of cases among those who had travelled to Africa, 14.1% of those who had travelled to Asia and 3% of those who had travelled to SC America (p 0.01). In conclusion, the GPP test improved the detection of enteropathogens and allowed better assessment of the aetiology of TD.
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Affiliation(s)
- Y Zboromyrska
- Department of Clinical Microbiology, Hospital Clínic, School of Medicine, University of Barcelona, Barcelona, Spain
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Domènech B, Vigués N, Mas J, Muñoz M, Muraviev DN, Macanás J. Polymer-Metal Nanocomposites Containing Dual-Function Metal Nanoparticles: Ion-Exchange Materials Modified with Catalytically-Active and Bactericide Silver Nanoparticles. Solvent Extraction and Ion Exchange 2014. [DOI: 10.1080/07366299.2013.839192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Garrido L, Sánchez O, Ferrera I, Tomàs N, Mas J. Dynamics of microbial diversity profiles in waters of different qualities. Approximation to an ecological quality indicator. Sci Total Environ 2014; 468-469:1154-1161. [PMID: 24121566 DOI: 10.1016/j.scitotenv.2013.08.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 08/20/2013] [Accepted: 08/22/2013] [Indexed: 06/02/2023]
Abstract
Over the past two decades, the amount of reclaimed water has increased throughout the world to face the current water shortage, and as a consequence there is an increasing interest to develop good indicators of water quality, beyond the traditional fecal indicators. In order to meet this need, in this work the microbial profiles of different wastewater treatment plant effluents, both secondary and tertiary, were studied and compared with water samples from an uncontaminated natural aquifer. Taking into account the most abundant phylogenetic groups found in these water samples, we calculated the Bacteroidetes, Gammaproteobacteria and Nitrospira/Betaproteobacteria (BGN:β) ratio and found significant differences between the mean ratios of the four water qualities. The secondary effluent ratios were never below 1.3 and the tertiary effluent and groundwater ratios were never over 0.85. Furthermore, calculation of this index with previous published data supports our results and indicates that the BGN:β ratio is a possible alternative indicator of water quality.
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Affiliation(s)
- L Garrido
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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Casanova A, Pichler G, Juan O, Solaz E, Mas J, Martinez F. P5.10 INFLUENCE OF OBESITY IN THE RELATIONSHIP BETWEEN CAROTID ARTERY FUNCTION AND CENTRAL BLOOD PRESSURE. Artery Res 2014. [DOI: 10.1016/j.artres.2014.09.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Muñoz-Berbel X, Rodríguez-Rodríguez R, Vigués N, Demming S, Mas J, Büttgenbach S, Verpoorte E, Ortiz P, Llobera A. Monolithically integrated biophotonic lab-on-a-chip for cell culture and simultaneous pH monitoring. Lab Chip 2013; 13:4239-4247. [PMID: 24056720 DOI: 10.1039/c3lc50746g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A poly(dimethylsiloxane) biophotonic lab-on-a-chip (bioPhLoC) containing two chambers, an incubation chamber and a monitoring chamber for cell retention/proliferation and pH monitoring, respectively, is presented. The bioPhLoC monolithically integrates a filter with 3 μm high size-exclusion microchannels, capable of efficiently trapping cells in the incubation chamber, as well as optical elements for real-time interrogation of both chambers. The integrated optical elements made possible both absorption and dispersion measurements, which were comparable to those made in a commercially available cuvette. The size-exclusion filter also showed good and stable trapping capacity when using yeast cells of variable size (between 5 and 8 μm diameter). For cell culture applications, vascular smooth muscle cells (VSMC), with sizes between 8 and 10 μm diameter, were used as a mammalian cell model. These cells were efficiently trapped in the incubation chamber, where they proliferated with a classical spindle-shaped morphology and a traditional hill-and-valley phenotype. During cell proliferation, pH changes in the culture medium due to cell metabolism were monitored in real time and with high precision in the monitoring chamber without interference of the measurement by cells and other (cell) debris.
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Affiliation(s)
- Xavier Muñoz-Berbel
- Centre Nacional de Microelectrònica (IMB-CNM, CSIC), Campus UAB, 08193 Bellaterra, Barcelona, Spain.
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Pickering C, Dykes J, Mas J, Domingo M, Yamauchi D, Lopatin G, Patricko J, Williams L. SU-E-T-288: Prediction of Initial Thyroid Therapy Clinical Exposure Rates Given the Amount of I-131 Activity and the Patient Habitus. Med Phys 2013. [DOI: 10.1118/1.4814722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Sánchez O, Ferrera I, González JM, Mas J. Assessing bacterial diversity in a seawater-processing wastewater treatment plant by 454-pyrosequencing of the 16S rRNA and amoA genes. Microb Biotechnol 2013; 6:435-42. [PMID: 23574645 PMCID: PMC3917478 DOI: 10.1111/1751-7915.12052] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 02/22/2013] [Indexed: 11/28/2022] Open
Abstract
The bacterial community composition of activated sludge from a wastewater treatment plant (Almería, Spain) with the particularity of using seawater was investigated by applying 454-pyrosequencing. The results showed that Deinococcus-Thermus, Proteobacteria, Chloroflexi and Bacteroidetes were the most abundant retrieved sequences, while other groups, such as Actinobacteria, Chlorobi, Deferribacteres, Firmicutes, Planctomycetes, Spirochaetes and Verrumicrobia were reported at lower proportions. Rarefaction analysis showed that very likely the diversity is higher than what could be described despite most of the unknown microorganisms probably correspond to rare diversity. Furthermore, the majority of taxa could not be classified at the genus level and likely represent novel members of these groups. Additionally, the nitrifiers in the sludge were characterized by pyrosequencing the amoA gene. In contrast, the nitrifying bacterial community, dominated by the genera Nitrosomonas, showed a low diversity and rarefaction curves exhibited saturation. These results suggest that only a few populations of low abundant but specialized bacteria are responsible for removal of ammonia in these saline wastewater systems.
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Affiliation(s)
- Olga Sánchez
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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Torrents A, Mas J, Muñoz FX, del Campo FJ. Design of a microfluidic respirometer for semi-continuous amperometric short time biochemical oxygen demand (BODst) analysis. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.04.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Alonso A, Muñoz-Berbel X, Vigués N, Macanás J, Muñoz M, Mas J, Muraviev DN. Characterization of fibrous polymer silver/cobalt nanocomposite with enhanced bactericide activity. Langmuir 2012; 28:783-790. [PMID: 22122091 DOI: 10.1021/la203239d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This manuscript describes the synthesis (based on the intermatrix synthesis (IMS) method), optimization, and application to bacterial disinfection of Ag@Co polymer-metal nanocomposite materials with magnetic and bactericidal properties. This material showed ideal bactericide features for being applied to bacterial disinfection of water, particularly (1) an enhanced bactericidal activity (when compared with other nanocomposites only containing Ag or Co nanoparticles), with a cell viability close to 0% for bacterial suspensions with an initial concentration below 10(5) colony forming units per milliliter (CFU/mL) after a single pass through the material, (2) capacity of killing a wide range of bacterial types (from coliforms to gram-positive bacteria), and (3) a long performance-time, with an efficiency of 100% (0% viability) up to 1 h of operation and higher than 90% during the first 24 h of continuous operation. The nanocomposite also showed a good performance when applied to water samples from natural sources with more complex matrices with efficiencies always higher than 80%.
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Affiliation(s)
- Amanda Alonso
- Analytical Chemistry Unit, Department of Chemistry, Universitat Autonòma de Barcelona, Bellaterra, Barcelona, Spain.
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Alonso A, Muñoz-Berbel X, Vigués N, Rodríguez-Rodríguez R, Macanás J, Mas J, Muñoz M, Muraviev DN. Intermatrix synthesis of monometallic and magnetic metal/metal oxide nanoparticles with bactericidal activity on anionic exchange polymers. RSC Adv 2012. [DOI: 10.1039/c2ra20216f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Uría N, Muñoz Berbel X, Sánchez O, Muñoz FX, Mas J. Transient storage of electrical charge in biofilms of Shewanella oneidensis MR-1 growing in a microbial fuel cell. Environ Sci Technol 2011; 45:10250-10256. [PMID: 21981730 DOI: 10.1021/es2025214] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Current output of microbial fuel cells (MFCs) depends on a number of engineering variables mainly related to the design of the fuel cell reactor and the materials used. In most cases the engineering of MFCs relies on the premise that for a constant biomass, current output correlates well with the metabolic activity of the cells. In this study we analyze to what extent, MFC output is also affected by the mode of operation, emphasizing how discontinuous operation can affect temporal patterns of current output. The experimental work has been carried out with Shewanella oneidensis MR-1, grown in conventional two-chamber MFCs subject to periodic interruptions of the external circuit. Our results indicate that after closure of the external circuit, current intensity shows a peak that decays back to basal values. The result suggests that the MFC has the ability to store charge during open circuit situations. Further studies using chronoamperometric analyses were carried out using isolated biofilms of Shewanella oneidensis MR-1 developed in a MFC and placed in an electrochemistry chamber in the presence of an electron donor. The results of these studies indicate that the amount of excess current over the basal level released by the biofilm after periods of circuit disconnection is proportional to the duration of the disconnection period up to a maximum of approximately 60 min. The results indicate that biofilms of Shewanella oneidensis MR-1 have the ability to store charge when oxidizing organic substrates in the absence of an external acceptor.
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Affiliation(s)
- Naroa Uría
- Group of Environmental Microbiology, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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Muñoz-Berbel X, Escudé-Pujol R, Vigués N, Cortina-Puig M, García-Aljaro C, Mas J, Muñoz FX. Real Time Automatic System for the Impedimetric Monitoring of Bacterial Growth. ANAL LETT 2011. [DOI: 10.1080/00032719.2011.553008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Sánchez O, Garrido L, Forn I, Massana R, Maldonado MI, Mas J. Molecular characterization of activated sludge from a seawater-processing wastewater treatment plant. Microb Biotechnol 2011; 4:628-42. [PMID: 21414181 PMCID: PMC3819012 DOI: 10.1111/j.1751-7915.2011.00256.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The prokaryotic community composition of activated sludge from a seawater‐processing wastewater treatment plant (Almeria, Spain) was investigated by using the rRNA approach, combining different molecular techniques such as denaturing gradient gel electrophoresis (DGGE), clone libraries and in situ hybridization (FISH and CARD‐FISH). Most of the sequences retrieved in the DGGE and the clone libraries were similar to uncultured members of different phyla. The most abundant sequence recovered from Bacteria in the clone library corresponded to a bacterium from the Deinococcus–Thermus cluster (almost 77% of the clones), and the library included members from other groups such as the Alpha, Gamma and Delta subclasses of Proteobacteria, the Bacteroidetes and Firmicutes. Concerning the archaeal clone library, we basically found sequences related to different orders of methanogenic Archaea, in correspondence with the recovered DGGE bands. Enumeration of DAPI (4′,6‐diamidino‐2‐phenylindole) stained cells from two different activated sludge samples after a mechanical flocculation disruption revealed a mean cell count of 1.6 × 109 ml−1. Around 94% of DAPI counts (mean value from both samples) hybridized with a Bacteria specific probe. Alphaproteobacteria were the dominant bacterial group (36% of DAPI counts), while Beta‐, Delta‐ and Gammaproteobacteria, Bacteroidetes, Actinobacteria and Firmicutes contributed to lower proportions (between 0.5–5.7% of DAPI counts). Archaea accounted only for 6% of DAPI counts. In addition, specific primers for amplification of the amoA (ammonia monooxygenase) gene were used to detect the presence of Beta, Gamma and archaeal nitrifiers, yielding positive amplifications only for Betaproteobacteria. This, together with negative in situ hybridizations with probes for well‐known nitrifiying bacteria, suggests that nitrification is performed by still undetected microorganisms. In summary, the combination of the three approaches provided different and complementary pictures of the real assemblage composition and allowed to get closer to the main microorganisms involved in key processes of seawater‐processing activated sludge.
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Affiliation(s)
- Olga Sánchez
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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Alonso A, Vigués N, Muñoz-Berbel X, Macanás J, Muñoz M, Mas J, Muraviev DN. Environmentally-safe bimetallic Ag@Co magnetic nanocomposites with antimicrobial activity. Chem Commun (Camb) 2011; 47:10464-6. [DOI: 10.1039/c1cc13696h] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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