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environmental microbiology

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https://www.readbyqxmd.com/read/28425677/microbial-dehalogenation-an-annotated-selection-of-world-wide-web-sites-relevant-to-the-topics-in-environmental-microbiology
#1
Lawrence P Wackett
No abstract text is available yet for this article.
April 20, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28412024/prevalence-of-bacterial-contamination-in-platelet-concentrates-at-the-national-center-of-blood-transfusion-mexico
#2
G Ibáñez-Cervantes, J M Bello-López, V Fernández-Sánchez, C A Domínguez-Mendoza, L I Acevedo-Alfaro
OBJECTIVES: Most common bacterial sepsis associated with transfusion is caused by contaminated Platelet Concentrates (PC). The screening of PC to detect bacterial contamination is obligatory in Mexico, and it is carried out in quality control programs. In Mexico, the identification and molecular characterization of bacterial contaminants to detect contamination sources have not been implemented due to high costs; however, it is an actual current need. MATERIAL AND METHODS: One hundred PC were randomly selected and microbiologically analyzed...
April 12, 2017: Transfusion Clinique et Biologique: Journal de la Société Française de Transfusion Sanguine
https://www.readbyqxmd.com/read/28409363/advances-in-the-treatment-of-problematic-industrial-biofilms
#3
REVIEW
D Xu, R Jia, Y Li, T Gu
In nature, microorganisms tend to form biofilms that consist of extracellular polymeric substances with embedded sessile cells. Biofilms, especially mixed-culture synergistic biofilm consortia, are notoriously difficult to treat. They employ various defense mechanisms against attacks from antimicrobial agents. Problematic industrial biofilms cause biofouling as well as biocorrosion, also known as microbiologically influenced corrosion. Biocides are often used to treat biofilms together with scrubbing or pigging...
May 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28407426/a-short-history-of-microbial-biofilms-and-biofilm-infections
#4
REVIEW
Niels Høiby
The observation of aggregated microbes surrounded by a self-produced matrix adhering to surfaces or located in tissues or secretions is old since both Leeuwenhoek and Pasteur have described the phenomenon. In environmental and technical microbiology, biofilms, 80-90 years ago, were already shown to be important for biofouling on submerged surfaces, for example, ships. The concept of biofilm infections and their importance in medicine was, however, initiated in the early 1970s by the observation of heaps of Pseudomonas aeruginosa cells in sputum and lung tissue from chronically infected cystic fibrosis patients...
April 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28402209/culturomics-a-new-kid-on-the-block-of-omics-to-enable-personalized-medicine
#5
Manousos E Kambouris, Cristiana Pavlidis, Efthymios Skoufas, Michael Arabatzis, Maria Kantzanou, Aristea Velegraki, George P Patrinos
This innovation analysis highlights the underestimated and versatile potential of the new field of culturomics and examines its relation to other OMICS system sciences such as infectiomics, metabolomics, phenomics, and pharmacomicrobiomics. The advent of molecular biology, followed by the emergence of various disciplines of the genomics, and most importantly metagenomics, brought about the sharp decline of conventional microbiology methods. Emergence of culturomics has a natural synergy with therapeutic and clinical genomic approaches so as to realize personalized medicine...
April 12, 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28399992/microbial-quality-of-irrigation-water-used-in-leafy-green-production-in-southern-brazil-and-its-relationship-with-produce-safety
#6
Luana Tombini Decol, Letícia Sopeña Casarin, Claudia Titze Hessel, Ana Carolina Fösch Batista, Ana Allende, Eduardo César Tondo
Irrigation water has been recognized as an important microbial risk factor for fruits and vegetables in many production areas, but there is still a lack of information about how the microbiological quality of different irrigation water sources and climatic conditions influence the safety of vegetables produced in Brazil. This study evaluated the distribution of generic E. coli and the prevalence of E. coli O157:H7 in two different water sources (ponds and streams bordering farmlands and urban areas) used for irrigation and on commercially produced lettuces in Southern Brazil...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28399144/microbial-quality-of-agricultural-water-in-central-florida
#7
Zeynal Topalcengiz, Laura K Strawn, Michelle D Danyluk
The microbial quality of water that comes into the edible portion of produce is believed to directly relate to the safety of produce, and metrics describing indicator organisms are commonly used to ensure safety. The US FDA Produce Safety Rule (PSR) sets very specific microbiological water quality metrics for agricultural water that contacts the harvestable portion of produce. Validation of these metrics for agricultural water is essential for produce safety. Water samples (500 mL) from six agricultural ponds were collected during the 2012/2013 and 2013/2014 growing seasons (46 and 44 samples respectively, 540 from all ponds)...
2017: PloS One
https://www.readbyqxmd.com/read/28387743/strategies-and-methodologies-for-developing-microbial-detoxification-systems-to-mitigate-mycotoxins
#8
REVIEW
Yan Zhu, Yousef I Hassan, Dion Lepp, Suqin Shao, Ting Zhou
Mycotoxins, the secondary metabolites of mycotoxigenic fungi, have been found in almost all agricultural commodities worldwide, causing enormous economic losses in livestock production and severe human health problems. Compared to traditional physical adsorption and chemical reactions, interest in biological detoxification methods that are environmentally sound, safe and highly efficient has seen a significant increase in recent years. However, researchers in this field have been facing tremendous unexpected challenges and are eager to find solutions...
April 7, 2017: Toxins
https://www.readbyqxmd.com/read/28383809/web-alert-human-microbiome-an-annotated-selection-of-world-wide-web-sites-relevant-to-the-topics-in-environmental-microbiology
#9
Lawrence P Wackett
No abstract text is available yet for this article.
April 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28382378/microbial-communities-associated-with-the-anthropogenic-highly-alkaline-environment-of-a-saline-soda-lime-poland
#10
Agnieszka Kalwasińska, Tamás Felföldi, Attila Szabó, Edyta Deja-Sikora, Przemysław Kosobucki, Maciej Walczak
Soda lime is a by-product of the Solvay soda process for the production of sodium carbonate from limestone and sodium chloride. Due to a high salt concentration and alkaline pH, the lime is considered as a potential habitat of haloalkaliphilic and haloalkalitolerant microbial communities. This artificial and unique environment is nutrient-poor and devoid of vegetation, due in part to semi-arid, saline and alkaline conditions. Samples taken from the surface layer of the lime and from the depth of 2 m (both having pH ~11 and ECe up to 423 dS m(-1)) were investigated using culture-based (culturing on alkaline medium) and culture-independent microbiological approaches (microscopic analyses and pyrosequencing)...
April 5, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28370986/gregarious-cyanobacteria
#11
Lucas J Stal
Huber and collaborators reported in this issue of Environmental Microbiology about freshwater picocyanobacteria that showed phenotypic plasticity in the sense that they appeared as single cells as well as in aggregates. The authors suggested that aggregation might be an inducible defense as a response to the presence of grazers. This has been described for eukaryotic phytoplankton and for the cyanobacterium Microcystis but thus far not for picocyanobacteria. Although inducible defense as an explanation is an attractive possibility, it is also problematic...
March 29, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28351634/protocol-for-the-recovery-and-detection-of-escherichia-coli-in-environmental-water-samples
#12
Ciprian Briciu-Burghina, Brendan Heery, Fiona Regan
To achieve active management of bathing areas and to reduce risk associated with the presence of fecal pollution, tests capable of rapid on-site assessment of microbiological water quality are required. A protocol for the recovery and detection of fecal pollution indicator bacteria, E. coli, using β-glucuronidase (GUS) activity was developed. The developed protocol involves two main steps: sample preparation and GUS activity measurement. In the sample preparation step, syringe filters were used with a dual purpose, for the recovery and pre-concentration of E...
April 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28351012/a-comprehensive-overview-on-electro-active-biofilms-role-of-exo-electrogens-and-their-microbial-niches-in-microbial-fuel-cells-mfcs
#13
Ganesh Dattatraya Saratale, Rijuta Ganesh Saratale, Muhammad Kashif Shahid, Guangyin Zhen, Gopalakrishnan Kumar, Han-Seung Shin, Young-Gyun Choi, Sang-Hyoun Kim
Microbial fuel cells (MFCs) are biocatalyzed systems which can drive electrical energy by directly converting chemical energy using microbial biocatalyst and are considered as one of the important propitious technologies for sustainable energy production. Much research on MFCs experiments is under way with great potential to become an alternative to produce clean energy from renewable waste. MFCs have been one of the most promising technologies for generating clean energy industry in the future. This article summarizes the important findings in electro-active biofilm formation and the role of exo-electrogens in electron transfer in MFCs...
March 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/28344353/environmental-microbiology-is-evidence-for-ancient-microbial-life-set-in-stone
#14
Shimona Starling
No abstract text is available yet for this article.
May 2017: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/28341673/a-next-generation-sequencing-approach-to-characterize-the-impacts-of-land-based-sources-of-pollution-on-the-microbiota-of-southeast-florida-coral-reefs
#15
Christopher Staley, Thomas Kaiser, Maribeth L Gidley, Ian C Enochs, Paul R Jones, Kelly D Goodwin, Christopher D Sinigalliano, Michael J Sadowsky, Chan Lan Chun
Coral reefs are dynamic ecosystems known for decades to be endangered due, in large part, to anthropogenic impacts from land-based sources of pollution (LBSP). In this study, we utilized an Illumina-based next-generation sequencing approach to characterize prokaryotic and fungal communities from samples collected off the southeast coast of Florida. Water samples from coastal inlet discharges, oceanic outfalls of municipal wastewater treatment plants, treated wastewater effluent before discharge, open ocean samples, and coral tissue samples (mucus and polyps) were characterized to determine relationships between microbial communities in these matrices and those in reef water and coral tissues...
March 24, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28337568/hospital-microbial-surface-colonization-revealed-during-monitoring-of-klebsiella-spp-pseudomonas-aeruginosa-and-non-tuberculous-mycobacteria
#16
Pedro Geadas Farias, Fernando Gama, Diogo Reis, Susana Alarico, Nuno Empadinhas, José Carlos Martins, Ana Figueiredo de Almeida, Paula Vasconcelos Morais
Hospital environmental conditions, human occupancy, and the characteristics of the equipment influence the survival of microbial communities and raise a concern with regard to nosocomial infections. The objective of the present work was to use the monitoring of Pseudomonas aeruginosa, Klebsiella spp. and non-tuberculous mycobacteria as a strategy to improve knowledge on microbial colonization of non-critical equipment and surfaces, in a tertiary hospital from Central Portugal. A 3-month microbiological survey was performed in a district teaching hospital...
March 23, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28337073/real-time-dna-sequencing-in-the-antarctic-dry-valleys-using-the-oxford-nanopore-sequencer
#17
Sarah S Johnson, Elena Zaikova, David S Goerlitz, Yu Bai, Scott W Tighe
The ability to sequence DNA outside of the laboratory setting has enabled novel research questions to be addressed in the field in diverse areas, ranging from environmental microbiology to viral epidemics. Here, we demonstrate the application of offline DNA sequencing of environmental samples using a hand-held nanopore sequencer in a remote field location: the McMurdo Dry Valleys, Antarctica. Sequencing was performed using a MK1B MinION sequencer from Oxford Nanopore Technologies (ONT; Oxford, United Kingdom) that was equipped with software to operate without internet connectivity...
April 2017: Journal of Biomolecular Techniques: JBT
https://www.readbyqxmd.com/read/28336165/suspicious-outbreak-of-ventilator-associated-pneumonia-caused-by-burkholderia-cepacia-in-a-surgical-intensive-care-unit
#18
LiPing Guo, Gang Li, Jian Wang, Xia Zhao, Shupeng Wang, Li Zhai, Hongbin Jia, Bin Cao
BACKGROUND: We reviewed Burkholderia cepacia infections in a hospital from 2013-2016 to report a suspicious outbreak that occurred in a surgical intensive care unit in 2015, and to outline the infection control measures adopted thereafter. METHODS: Review of the health care-associated infection data regarding B cepacia via the surveillance system, hospital information system, electronic medical records, and laboratory information system together with the outbreak investigation was managed by the health care-associated infection control team...
March 20, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28334283/the-microbiology-of-oil-sands-tailings-past-present-future
#19
Julia M Foght, Lisa M Gieg, Tariq Siddique
Surface mining of enormous oil sands deposits in northeastern Alberta, Canada since 1967 has contributed greatly to Canada's economy but has also received negative international attention due largely to environmental concerns and challenges. Not only have microbes profoundly affected the composition and behaviour of this petroleum resource over geological time, they currently influence the management of semi-solid tailings in oil sands tailing ponds (OSTP) and tailings reclamation. Historically, microbial impacts on OSTP were generally discounted but next-generation sequencing and biogeochemical studies have revealed unexpectedly diverse indigenous communities and expanded our fundamental understanding of anaerobic microbial functions...
March 9, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28334157/overview-of-freshwater-microbial-eukaryotes-diversity-a-first-analysis-of-publicly-available-metabarcoding-data
#20
Didier Debroas, Isabelle Domaizon, Jean-Francois Humbert, Ludwig Jardillier, Cécile Lepère, Anne Oudart, Najwa Taïb
Although they are widespread, diverse and involved in biogeochemical cycles, microbial eukaryotes attract less attention than their prokaryotic counterparts in environmental microbiology. In this study, we used publicly available 18S barcoding data to define biases that may limit such analyses and to gain an overview of the planktonic microbial eukaryotic diversity in freshwater ecosystems. The richness of the microbial eukaryotes was estimated to 100 798 operational taxonomic units (OTUs) delineating 1267 clusters or phylogenetic units (PUs, i...
April 1, 2017: FEMS Microbiology Ecology
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