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Soil microbiology

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https://www.readbyqxmd.com/read/28918337/ecotoxicological-and-microbiological-assessment-of-sewage-sludge-associated-with-sugarcane-bagasse
#1
Lais Roberta Deroldo Sommaggio, Dânia Elisa Christofoletti Mazzeo, Débora de Andrade E Silva Sant' Anna, Carlos Emílio Levy, Maria Aparecida Marin-Morales
Sewage sludge (SS) obtained after sewage treatment process may contain several toxic substances. Bioremediation can decrease the toxicity of the sludge, mainly when it is associated with stimulant agents, such as sugarcane bagasse (B). Samples of pure SS (SSP); SS+B; SS+Soil; and SS+B+Soil were bioremediated for 1, 3, and 6 months (T1, T2, and T3, respectively). After each period, the cytotoxic, genotoxic, and mutagenic potentials of the solid samples and their respective aqueous extracts (aqueous eluate and percolate water) were evaluated by the Allium cepa test...
September 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28913724/use-of-phytoproductivity-data-in-the-choice-of-native-plant-species-to-restore-a-degraded-coal-mining-site-amended-with-a-stabilized-industrial-organic-sludge
#2
Claudete G Chiochetta, Hela Toumi, Renata F S Böhm, Fernanda Engel, Gabriel Poyer-Radetski, Leonardo R Rörig, Fabrizio Adani, Claudemir M Radetski
Coal mining-related activities result in a degraded landscape and sites associated with large amounts of dumped waste material. The arid soil resulting from acid mine drainage affects terrestrial and aquatic ecosystems, and thus, site remediation programs must be implemented to mitigate this sequential deleterious processes. A low-cost alternative material to counterbalance the affected physico-chemical-microbiological aspects of the degraded soil is the amendment with low contaminated and stabilized industrial organic sludge...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28890580/the-role-of-compost-in-stabilizing-the-microbiological-and-biochemical-properties-of-zinc-stressed-soil
#3
Rafał Strachel, Jadwiga Wyszkowska, Małgorzata Baćmaga
The progressive development of civilization and intensive industrialization has contributed to the global pollution of the natural environment by heavy metals, especially the soil. Degraded soils generally contain less organic matter, and thus, their homeostasis is more often disturbed, which in turn manifests in changes in biological and physicochemical properties of the soil. Therefore, new possibilities and solutions for possible neutralization of these contaminations are sought, inter alia, through reclamation of degraded land...
2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28869549/microbiological-impact-of-the-use-of-reclaimed-wastewater-in-recreational-parks
#4
Oskar A Palacios, Francisco J Zavala-Díaz de la Serna, María de Lourdes Ballinas-Casarrubias, María S Espino-Valdés, Guadalupe V Nevárez-Moorillón
Reclaimed wastewater for irrigation is an opportunity for recovery of this natural resource. In this study, microbial risk from the use of treated wastewater for irrigation of recreational parks in the city of Chihuahua, evaluating the effect of distribution distance, season, and presence of storage tanks, was analyzed. Escherichia coli, Salmonella, and multidrug-resistant bacteria were recovered from samples of reclaimed water and soils at recreational parks in Chihuahua by the membrane filtration method, using selected agars for microbial growth...
September 4, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28843124/impact-of-the-reusing-of-food-manufacturing-wastewater-for-irrigation-in-a-closed-system-on-the-microbiological-quality-of-the-food-crops
#5
Luciano Beneduce, Giuseppe Gatta, Antonio Bevilacqua, Angela Libutti, Emanuele Tarantino, Micol Bellucci, Eleonora Troiano, Giuseppe Spano
In order to evaluate if the reuse of food industry treated wastewater is compatible for irrigation of food crops, without increased health risk, in the present study a cropping system, in which ground water and treated wastewater were used for irrigation of tomato and broccoli, during consecutive crop seasons was monitored. Water, crop environment and final products were monitored for microbial indicators and pathogenic bacteria, by conventional and molecular methods. The microbial quality of the irrigation waters influenced sporadically the presence of microbial indicators in soil...
August 16, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28841503/biodegradation-of-polycyclic-aromatic-hydrocarbons-using-microbial-bioelectrochemical-systems-to-overcome-an-impasse
#6
REVIEW
Maria Kronenberg, Eric Trably, Nicolas Bernet, Dominique Patureau
Polycyclic aromatic hydrocarbons (PAHs) are hardly biodegradable carcinogenic organic compounds. Bioremediation is a commonly used method for treating PAH contaminated environments such as soils, sediment, water bodies and wastewater. However, bioremediation has various drawbacks including the low abundance, diversity and activity of indigenous hydrocarbon degrading bacteria, their slow growth rates and especially a limited bioavailability of PAHs in the aqueous phase. Addition of nutrients, electron acceptors or co-substrates to enhance indigenous microbial activity is costly and added chemicals often diffuse away from the target compound, thus pointing out an impasse for the bioremediation of PAHs...
August 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28827656/characterization-of-a-novel-class-a-carbapenemase-pad-1-from-paramesorhizobium-desertii-a-3-e-t-a-strain-highly-resistant-to-%C3%AE-lactam-antibiotics
#7
Ruichen Lv, Jingyu Guo, YanFeng Yan, Rong Chen, Lisheng Xiao, Min Wang, Nan Fang, Chengxiang Fang, Yujun Cui, Ruifu Yang, Yajun Song
Although clinical antibiotic-resistant bacteria have attracted tremendous attention in the microbiology community, the resistant bacteria that persist in natural environments have been overlooked for a longtime. We previously proposed a new species Paramesorhizobium desertii, isolated from the soil of the Taklimakan Desert in China that is highly resistant to most β-lactam antibiotics. To identify potential β-lactamase(s) in this bacteria, we first confirmed the carbapenemase activity in the freeze-thawed supernatant of a P...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815983/web-alert-microbial-communities-in-the-plant-soil-system-an-annotated-selection-of-world-wide-web-sites-relevant-to-the-topics-in-environmental-microbiology
#8
Lawrence P Wackett
No abstract text is available yet for this article.
August 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28815469/metagenome-analysis-a-powerful-tool-for-enzyme-bioprospecting
#9
Aravind Madhavan, Raveendran Sindhu, Binod Parameswaran, Rajeev K Sukumaran, Ashok Pandey
Microorganisms are found throughout every corner of nature, and vast number of microorganisms is difficult to cultivate by classical microbiological techniques. The advent of metagenomics has revolutionized the field of microbial biotechnology. Metagenomics allow the recovery of genetic material directly from environmental niches without any cultivation techniques. Currently, metagenomic tools are widely employed as powerful tools to isolate and identify enzymes with novel biocatalytic activities from the uncultivable component of microbial communities...
August 16, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28801105/rectal-swab-screening-assays-of-public-health-importance-in-molecular-diagnostics-sample-adequacy-control
#10
Sanja Glisovic, Shaun Eintracht, Yves Longtin, Matthew Oughton, Ivan Brukner
Rectal swabs are routinely used by public health authorities to screen for multi-drug resistant enteric bacteria including vancomycin-resistant enterococci (VRE) and carbapenem-resistant enterobacteriaceae (CRE). Screening sensitivity can be influenced by the quality of the swabbing, whether performed by the patient (self-swabbing) or a healthcare practitioner. One common exclusion criterion for rectal swabs is absence of "visible soiling" from fecal matter. In our institution, this criterion excludes almost 10% of rectal swabs received in the microbiology laboratory...
August 8, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28782997/pathogen-decontamination-of-food-crop-soil-a-review
#11
Joshua B Gurtler
The purpose of this review is to delineate means of decontaminating soil. This information might be used to mitigate soil-associated risks of foodborne pathogens. The majority of the research in the published literature involves inactivation of plant pathogens in soil, i.e., those pathogens harmful to fruit and vegetable production and ornamental plants. Very little has been published regarding the inactivation of foodborne human pathogens in crop soil. Nevertheless, because decontamination techniques for plant pathogens might also be useful methods for eliminating foodborne pathogens, this review also includes inactivation of plant pathogens, with appropriate discussion and comparisons, in the hopes that these methods may one day be validated against foodborne pathogens...
September 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28776041/hiding-in-plain-sight-mining-bacterial-species-records-for-phenotypic-trait-information
#12
Albert Barberán, Hildamarie Caceres Velazquez, Stuart Jones, Noah Fierer
Cultivation in the laboratory is essential for understanding the phenotypic characteristics and environmental preferences of bacteria. However, basic phenotypic information is not readily accessible. Here, we compiled phenotypic and environmental tolerance information for >5,000 bacterial strains described in the International Journal of Systematic and Evolutionary Microbiology (IJSEM) with all information made publicly available in an updatable database. Although the data span 23 different bacterial phyla, most entries described aerobic, mesophilic, neutrophilic strains from Proteobacteria (mainly Alpha- and Gammaproteobacteria), Actinobacteria, Firmicutes, and Bacteroidetes isolated from soils, marine habitats, and plants...
July 2017: MSphere
https://www.readbyqxmd.com/read/28766823/isolation-of-bacteriophages-from-air-using-vacuum-filtration-technique-an-improved-and-novel-method
#13
B Magare, A Nair, K Khairnar
AIM: Development of a simple and economical air sampler for isolation and enrichment of bacteriophages from air samples. METHODS AND RESULTS: A vacuum filtration unit with simple modifications was used for isolation of bacteriophages from air sampled in the lavatory. Air was sampled at the rate of 62 l min(-1) by bubbling into Mcllvaine buffer for 30 min, which was used as bacteriophage solution for enrichment and plaque assessment against individual hosts. Alternatively, the aforementioned phage solution was enriched using a host consortium before plaque assessment...
August 2, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28729688/improved-genome-recovery-and-integrated-cell-size-analyses-of-individual-uncultured-microbial-cells-and-viral-particles
#14
Ramunas Stepanauskas, Elizabeth A Fergusson, Joseph Brown, Nicole J Poulton, Ben Tupper, Jessica M Labonté, Eric D Becraft, Julia M Brown, Maria G Pachiadaki, Tadas Povilaitis, Brian P Thompson, Corianna J Mascena, Wendy K Bellows, Arvydas Lubys
Microbial single-cell genomics can be used to provide insights into the metabolic potential, interactions, and evolution of uncultured microorganisms. Here we present WGA-X, a method based on multiple displacement amplification of DNA that utilizes a thermostable mutant of the phi29 polymerase. WGA-X enhances genome recovery from individual microbial cells and viral particles while maintaining ease of use and scalability. The greatest improvements are observed when amplifying high G+C content templates, such as those belonging to the predominant bacteria in agricultural soils...
July 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28718021/evidence-for-photolytic-and-microbial-degradation-processes-in-the-dissipation-of-leptospermone-a-natural-%C3%AE-triketone-herbicide
#15
Sana Romdhane, Marion Devers-Lamrani, Fabrice Martin-Laurent, Amani Ben Jrad, Delphine Raviglione, Marie-Virginie Salvia, Pascale Besse-Hoggan, Franck E Dayan, Cédric Bertrand, Lise Barthelmebs
Bioherbicides appear as an ecofriendly alternative to synthetic herbicides, generally used for weed management, because they are supposed to have low side on human health and ecosystems. In this context, our work aims to study abiotic (i.e., photolysis) and biotic (i.e,. biodegradation) processes involved in the fate of leptospermone, a natural β-triketone herbicide, by combining chemical and microbiological approaches. Under controlled conditions, the photolysis of leptospermone was sensitive to pH. Leptospermone has a half-life of 72 h under simulated solar light irradiations...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28707243/research-trends-and-hotspots-related-to-ammonia-oxidation-based-on-bibliometric-analysis
#16
Maosheng Zheng, Hui-Zhen Fu, Yuh-Shan Ho
Ammonia oxidation is the rate-limiting and central step in global biogeochemistry cycle of nitrogen. A bibliometric analysis based on 4314 articles extracted from Science Citation Index Expanded database was carried out to provide insights into publication performances and research trends of ammonia oxidation in the period 1991-2014. These articles were originated from a wide range of 602 journals and 95 Web of Science Categories, among which Applied and Environmental Microbiology and Environmental Sciences took the leading position, respectively...
July 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28697385/quantitative-contamination-assessment-of-escherichia-coli-in-baby-spinach-primary-production-in-spain-effects-of-weather-conditions-and-agricultural-practices
#17
Ana Allende, Irene Castro-Ibáñez, Roland Lindqvist, María Isabel Gil, Mieke Uyttendaele, Liesbeth Jacxsens
A quantitative microbial contamination model of Escherichia coli during primary production of baby spinach was developed. The model included only systematic contamination routes (e.g. soil and irrigation water) and it was used to evaluate the potential impact of weather conditions, agricultural practices as well as bacterial fitness in soil on the E. coli levels present in the crop at harvest. The model can be used to estimate E. coli contamination of baby spinach via irrigation water, via soil splashing due to irrigation water or rain events, and also including the inactivation of E...
June 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28693949/composting-of-food-wastes-status-and-challenges
#18
REVIEW
Alejandra Cerda, Adriana Artola, Xavier Font, Raquel Barrena, Teresa Gea, Antoni Sánchez
This review analyses the main challenges of the process of food waste composting and examines the crucial aspects related to the quality of the produced compost. Although recent advances have been made in crucial aspects of the process, such composting microbiology, improvements are needed in process monitoring. Therefore, specific problems related to food waste composting, such as the presence of impurities, are thoroughly analysed in this study. In addition, environmental impacts related to food waste composting, such as emissions of greenhouse gases and odours, are discussed...
June 26, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28684789/soil-bacterial-quantification-approaches-coupling-with-relative-abundances-reflecting-the-changes-of-taxa
#19
Zhaojing Zhang, Yuanyuan Qu, Shuzhen Li, Kai Feng, Shang Wang, Weiwei Cai, Yuting Liang, Hui Li, Meiying Xu, Huaqun Yin, Ye Deng
Understanding the abundance change of certain bacterial taxa is quite important for the study of soil microbiology. However, the observed differences of relative abundances by high-throughput techniques may not accurately reflect those of the actual taxon abundances. This study investigated whether soil microbial abundances coupling with microbial quantities can be more informative in describing the microbial population distribution under different locations. We analyzed relative abundances of the major species in soil microbial communities from Beijing and Tibet grasslands by using 16 S rRNA high-throughput sequencing technique, and quantified the absolute bacterial cell numbers directly or indirectly by multiple culture-independent measurements, including adenosine tri-phosphate (ATP), flow cytometry (FCM), quantitative real-time PCR (qPCR), phospholipid fatty acids (PLFA) and microbial biomass Carbon (MBC)...
July 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28658756/unusual-severe-extra-intestinal-manifestations-of-a-common-enteric-pathogen-aeromonas-spp
#20
Barnini Banerjee, Mridula Madiyal, Lingadakai Ramchandra, Chiranjay Mukhopadhyay, Rahul Garg, Kiran Chawla
INTRODUCTION: Aeromonas spp. are halophilic, Gram-negative bacilli. They are widely distributed in the soil and aquatic environment and have been associated with various extra-intestinal infections, such as skin and soft-tissue infections, meningitis, bacteraemia etc. The most common species associated with extra-intestinal infection is Aeromonas hydrophila. AIM: To get the overview of clinical presentations, underlying predisposing factors associated with the extra-intestinal infections caused by Aeromonas species and their antimicrobial susceptibility pattern...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
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