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https://www.readbyqxmd.com/read/28534987/high%C3%A2-throughput-sequencing-analyses-of-oral-microbial-diversity-in-healthy-people-and-patients-with-dental-caries-and-periodontal-disease
#1
Tingtao Chen, Yan Shi, Xiaolei Wang, Xin Wang, Fanjing Meng, Shaoguo Yang, Jian Yang, Hongbo Xin
Recurrence of oral diseases caused by antibiotics has brought about an urgent requirement to explore the oral microbial diversity in the human oral cavity. In the present study, the high‑throughput sequencing method was adopted to compare the microbial diversity of healthy people and oral patients and sequence analysis was performed by UPARSE software package. The Venn results indicated that a mean of 315 operational taxonomic units (OTUs) was obtained, and 73, 64, 53, 19 and 18 common OTUs belonging to Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria and Fusobacteria, respectively, were identified in healthy people...
May 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28533966/microbiome-patterns-across-the-gastrointestinal-tract-of-the-rabbitfish-siganus-fuscescens
#2
Shaun Nielsen, Jackson Wilkes Walburn, Adriana Vergés, Torsten Thomas, Suhelen Egan
Most of our knowledge regarding the biodiversity of gut microbes comes from terrestrial organisms or marine species of economic value, with less emphasis on ecologically important species. Here we investigate the bacterial composition associated with the gut of Siganus fuscescens, a rabbitfish that plays an important ecological role in coastal ecosystems by consuming seaweeds. Members of Firmicutes, Bacteroidetes and delta-Proteobacteria were among the dominant taxa across samples taken from the contents and the walls (sites) of the midgut and hindgut (location)...
2017: PeerJ
https://www.readbyqxmd.com/read/28532620/real-time-monitoring-of-methane-oxidation-in-a-simulated-landfill-cover-soil-and-miseq-pyrosequencing-analysis-of-the-related-bacterial-community-structure
#3
Zhilin Xing, Tiantao Zhao, Yanhui Gao, Zhi He, Lijie Zhang, Xuya Peng, Liyan Song
Real-time CH4 oxidation in a landfill cover soil was studied using automated gas sampling that determined biogas (CH4 and CO2) and O2 concentrations at various depths in a simulated landfill cover soil (SLCS) column reactor. The real-time monitoring system obtained more than 10,000 biogas (CH4 and CO2) and O2 data points covering 32 steady states of CH4 oxidation with 32 different CH4 fluxes (0.2-125mol·m(-2)·d(-1)). The kinetics of CH4 oxidation at different depths (0-20cm, 20-40cm, and 40-60cm) of SLCS were well fit by a CH4-O2 dual-substrate model based on 32 values (averaged, n=5-15) of equilibrated CH4 concentrations...
May 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28532414/association-between-body-mass-index-and-firmicutes-bacteroidetes-ratio-in-an-adult-ukrainian-population
#4
Alexander Koliada, Ganna Syzenko, Vladislav Moseiko, Liudmyla Budovska, Kostiantyn Puchkov, Vyacheslav Perederiy, Yuriy Gavalko, Andriy Dorofeyev, Maryana Romanenko, Sergiy Tkach, Lyudmila Sineok, Oleh Lushchak, Alexander Vaiserman
BACKGROUND: Metagenomic studies confirm that obesity is associated with a composition of gut microbiota. There are some controversies, however, about the composition of gut microbial communities in obese individuals in different populations. To examine the association between body mass index and microbiota composition in Ukrainian population, fecal concentrations of Bacteroidetes, Firmicutes, Actinobacteria and Firmicutes/Bacteroidetes (F/B) ratio were analyzed in 61 adult individuals...
May 22, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28531262/biogeography-of-cryoconite-bacterial-communities-on-glaciers-of-the-tibetan-plateau
#5
Yongqin Liu, Trista J Vick-Majors, John C Priscu, Tandong Yao, Shichang Kang, Keshao Liu, Ziyuang Cong, Jingbo Xiong, Yang Li
Cryoconite holes, water-filled pockets containing biological and mineralogical deposits that form on glacier surfaces, play important roles in glacier mass balance, glacial geochemistry, and carbon cycling. The presence of cryoconite material decreases surface albedo and accelerates glacier mass loss, a problem of particular importance in the rapidly melting Tibetan Plateau. No studies have addressed the microbial community composition of cryoconite holes and their associated ecosystem processes on Tibetan glaciers...
May 20, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28527917/spatial-distribution-of-vanadium-and-microbial-community-responses-in-surface-soil-of-panzhihua-mining-and-smelting-area-china
#6
Xuelong Cao, Muhe Diao, Baogang Zhang, Hui Liu, Song Wang, Meng Yang
Spatial distribution of vanadium in surface soils from different processing stages of vanadium-bearing titanomagnetite in Panzhihua mining and smelting area (China) as well as responses of microbial communities including bacteria and fungi to vanadium were investigated by fieldwork and laboratory incubation experiment. The vanadium contents in this region ranged from 149.3 to 4793.6 mg kg(-1), exceeding the soil background value of vanadium in China (82 mg kg(-1)) largely. High-throughput DNA sequencing results showed bacterial communities from different manufacturing locations were quite diverse, but Bacteroidetes and Proteobacteria were abundant in all samples...
May 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526852/health-benefit-of-vegetable-fruit-juice-based-diet-role-of-microbiome
#7
Susanne M Henning, Jieping Yang, Paul Shao, Ru-Po Lee, Jianjun Huang, Austin Ly, Mark Hsu, Qing-Yi Lu, Gail Thames, David Heber, Zhaoping Li
The gut microbiota is an important contributor to human health. Vegetable/fruit juices provide polyphenols, oligosaccharides, fiber and nitrate (beet juice), which may induce a prebiotic-like effect. Juice-based diets are becoming popular. However, there is a lack of scientific evidence of their health benefits. It was our hypothesis that changes in the intestinal microbiota induced by a juice-based diet play an important role in their health benefits. Twenty healthy adults consumed only vegetable/fruit juices for 3 days followed by 14 days of customary diet...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526748/the-sialate-o-acetylesterase-esta-from-gut-bacteroidetes-species-enables-sialidase-mediated-cross-species-foraging-of-9-o-acetylated-sialoglycans
#8
Lloyd S Robinson, Warren G Lewis, Amanda L Lewis
The gut harbors many symbiotic, commensal, and pathogenic microbes that engage in the breakdown and metabolism of host carbohydrates. Sialic acids are prominent outermost carbohydrates on mucins and protect underlying glycan chains from enzymatic degradation. Sialidases produced by some members of the colonic microbiota have been shown to promote the expansion of several potential pathogens (e.g. Clostridium difficile, Salmonella, Escherichia coli) that do not produce sialidases. O-acetyl ester modifications of sialic acids help resist the action of many sialidases and are found at high levels in the mammalian colon...
May 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28523623/microbial-population-shift-caused-by-sulfamethoxazole-in-engineered-soil-aquifer-treatment-e-sat-system
#9
Ashwinkumar P Rudrashetti, Niti B Jadeja, Deepa Gandhi, Asha A Juwarkar, Abhinav Sharma, Atya Kapley, R A Pandey
The engineered-Soil Aquifer Treatment (e-SAT) system was exploited for the biological degradation of Sulfamethoxazole (SMX) which is known to bio-accumulate in the environment. The fate of SMX in soil column was studied through laboratory simulation for a period of 90 days. About 20 ppm SMX concentration could be removed in four consecutive cycles in e-SAT. To understand the microbial community change and biological degradation of SMX in e-SAT system, metagenomic analysis was performed for the soil samples before (A-EBD) and after SMX exposure (B-EBD) in the e-SAT...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28523395/evaluating-the-association-between-body-weight-and-the-intestinal-microbiota-of-weaned-piglets-via-16s-rrna-sequencing
#10
Geon Goo Han, Jun-Yeong Lee, Gwi-Deuk Jin, Jongbin Park, Yo Han Choi, Byung Jo Chae, Eun Bae Kim, Yun-Jaie Choi
Due to the ban on the use of antimicrobial growth promoters in livestock feeds, understanding the relationship between intestinal microbiota and the physiology of the host has become very important for improving livestock performance. In this study, we investigated the relationship between intestinal microbiota and body weights of weaned piglets. Lighter (n = 9) and heavier (n = 9) 9-week-old weaned piglets were selected from approximately one hundred individuals based on their body weights. Their fecal microbial communities were analyzed by sequencing the V4 region of the 16S rRNA gene...
May 18, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28513533/deleterious-metabolic-effects-of-high-fructose-intake-the-preventive-effect-of-lactobacillus-kefiri-administration
#11
María Guillermina Zubiría, Sabrina Eliana Gambaro, María Amanda Rey, Paula Carasi, María de Los Ángeles Serradell, Andrés Giovambattista
Modern lifestyle and diets have been associated with metabolic disorders and an imbalance in the normal gut microbiota. Probiotics are widely known for their health beneficial properties targeting the gut microbial ecosystem. The aim of our study was to evaluate the preventive effect of Lactobacillus kefiri (L. kefiri) administration in a fructose-rich diet (FRD) mice model. Mice were provided with tap water or fructose-added (20% w/v) drinking water supplemented or not with L. kefiri. Results showed that probiotic administration prevented weight gain and epidydimal adipose tissue (EAT) expansion, with partial reversion of the adipocyte hypertrophy developed by FRD...
May 17, 2017: Nutrients
https://www.readbyqxmd.com/read/28512451/colonization-and-succession-within-the-human-gut-microbiome-by-archaea-bacteria-and-microeukaryotes-during-the-first-year-of-life
#12
Linda Wampach, Anna Heintz-Buschart, Angela Hogan, Emilie E L Muller, Shaman Narayanasamy, Cedric C Laczny, Luisa W Hugerth, Lutz Bindl, Jean Bottu, Anders F Andersson, Carine de Beaufort, Paul Wilmes
Perturbations to the colonization process of the human gastrointestinal tract have been suggested to result in adverse health effects later in life. Although much research has been performed on bacterial colonization and succession, much less is known about the other two domains of life, archaea, and eukaryotes. Here we describe colonization and succession by bacteria, archaea and microeukaryotes during the first year of life (samples collected around days 1, 3, 5, 28, 150, and 365) within the gastrointestinal tract of infants delivered either vaginally or by cesarean section and using a combination of quantitative real-time PCR as well as 16S and 18S rRNA gene amplicon sequencing...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28511691/tomato-root-microbiota-and-phytophthora-parasitica-associated-disease
#13
Marie Larousse, Corinne Rancurel, Camille Syska, Ferran Palero, Catherine Etienne, Benoît Industri, Xavier Nesme, Marc Bardin, Eric Galiana
BACKGROUND: Interactions between pathogenic oomycetes and microbiota residing on the surface of the host plant root are unknown, despite being critical to inoculum constitution. The nature of these interactions was explored for the polyphagous and telluric species Phytophthora parasitica. RESULTS: Composition of the rhizospheric microbiota of Solanum lycopersicum was characterized using deep re-sequencing of 16S rRNA gene to analyze tomato roots either free of or partly covered with P...
May 16, 2017: Microbiome
https://www.readbyqxmd.com/read/28510800/structural-modulation-of-gut-microbiota-in-bama-minipigs-in-response-to-treatment-with-a-growth-promoting-agent-salbutamol
#14
Chenyang Lu, Jun Zhou, Yanyan Li, Dijun Zhang, Zuzhong Wang, Ye Li, Lingzhi Cheong, Chundan Zhang, Xiurong Su
Even though salbutamol (SAL) had remarkable effects on the enhancement of growth rate and carcass composition in different livestock species such as cattle, pigs, sheep and poultry, it was banned as a growth promoter because of its adverse effects on health. However, the specific mechanism by which salbutamol enhances growth efficiency remains unknown. In this study, Bama pigs were randomly allocated to receive salbutamol (5 mg/kg) for 30 or 60 days and were compared with untreated pigs. Pigs treated with salbutamol demonstrated enhanced growth rates and carcass composition; however, they showed deterioration in blood biochemical indices and organ development...
May 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28505184/steadycom-predicting-microbial-abundances-while-ensuring-community-stability
#15
Siu Hung Joshua Chan, Margaret N Simons, Costas D Maranas
Genome-scale metabolic modeling has become widespread for analyzing microbial metabolism. Extending this established paradigm to more complex microbial communities is emerging as a promising way to unravel the interactions and biochemical repertoire of these omnipresent systems. While several modeling techniques have been developed for microbial communities, little emphasis has been placed on the need to impose a time-averaged constant growth rate across all members for a community to ensure co-existence and stability...
May 15, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28504578/effects-of-dietary-chitosan-on-growth-lipid-metabolism-immune-response-and-antioxidant-related-gene-expression-in-misgurnus-anguillicaudatus
#16
J Yan, C Guo, M A O Dawood, J Gao
This study was performed to evaluate the effects of dietary chitosan supplementation on growth performance, lipid metabolism, gut microbial, antioxidant status and immune responses of juvenile loach (Misgurnus anguillicaudatus). Five experimental diets were formulated to contain graded levels of chitosan (0 (control), 0.5, 1, 2 and 5% CHI) for 50 days. Results of the present study showed that body weight gain was significantly higher in fish fed chitosan supplemented diets in dose dependent manner than control group...
May 15, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28502052/variation-of-microbial-communities-and-functional-genes-during-the-biofilm-formation-in-raw-water-distribution-systems-and-associated-effects-on-the-transformation-of-nitrogen-pollutants
#17
Wei Chen, Yanmei Gu, Hang Xu, Zhigang Liu, Chunhui Lu, Chenshuo Lin
This study aimed to investigate the variation of microbial communities and functional genes during the biofilm formation in raw water distribution systems without prechlorination and associated effects on the transformation of nitrogen pollutants by using a designed model pipe system. The results showed the transformation of nitrogen pollutants was obvious during the biofilm formation. The richness and diversity of the microbial communities changed significantly. The higher abundance of Nitrospirae in biofilm samples significantly contributed to biological nitrification...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28501683/efficiency-of-an-upflow-anaerobic-sludge-blanket-reactor-treating-potato-starch-processing-wastewater-and-related-process-kinetics-functional-microbial-community-and-sludge-morphology
#18
Philip Antwi, Jianzheng Li, Portia Opoku Boadi, Jia Meng, Frank Koblah Quashie, Xin Wang, Nanqi Ren, Gerardo Buelna
Herein, an upflow anaerobic sludge blanket reactor was employed to treat potato starch processing wastewater and the efficacy, kinetics, microbial diversity and morphology of sludge granules were investigated. When organic loading rate (OLR) ranging from 2.70 to 13.27kgCOD/m(3).d was implemented with various hydraulic retention times (72h, 48h and 36h), COD removal could reach 92.0-97.7%. Highest COD removal (97.7%) was noticed when OLR was 3.65kgCOD/m(3).d, but had declined to 92.0% when OLR was elevated to 13...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28499184/effects-of-graphite-nanoparticles-on-nitrification-in-an-activated-sludge-system
#19
Qian Dong, Yanchen Liu, Hanchang Shi, Xia Huang
Graphite nanoparticles (GNPs) might result in unexpected effects during their transportation and transformation in wastewater treatment systems, including strong thermo-catalytic and catalytic effects and microbial cytotoxicity. In particular, the effects of GNPs on the nitrification process in activated sludge systems should be addressed. This study aimed to estimate the influence of GNPs on the nitrification process in a short-term nitrification reactor with exposure to different light sources. The results indicated that GNPs could only improve the efficiency of photothermal transformation slightly in the activated sludge system because of its photothermal effects under the standard illuminant (imitating 1 × sun)...
May 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28498996/protective-factors-in-the-intestinal-microbiome-against-clostridium-difficile-infection-in-recipients-of-allogeneic-hematopoietic-stem-cell-transplantation
#20
Yeon Joo Lee, Esther S Arguello, Robert R Jenq, Eric Littmann, Grace J Kim, Liza C Miller, Lilan Ling, Cesar Figueroa, Elizabeth Robilotti, Miguel-Angel Perales, Juliet N Barker, Sergio Giralt, Marcel R M van den Brink, Eric G Pamer, Ying Taur
Background: Clostridium difficile infection (CDI) is a frequent complication in recipients of allogeneic hematopoietic stem cell transplantation (allo-HSCT), who receive intensive treatments that significantly disrupt the intestinal microbiota. In this study, we examined the microbiota composition of allo-HSCT recipients to identify bacterial colonizers that confer protection against CDI after engraftment. Methods: Feces collected from adult recipients allo-HSCT at engraftment were analyzed; 16S ribosomal RNA genes were sequenced and analyzed from each sample...
April 1, 2017: Journal of Infectious Diseases
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