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Microbiome or microbiota or commensal

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https://www.readbyqxmd.com/read/28231697/the-fecal-microbiota-composition-of-boar-duroc-yorkshire-landrace-and-hampshire-pigs
#1
Yingping Xiao, Kaifeng Li, Yun Xiang, Weidong Zhou, Guohong Gui, Hua Yang
To investigate the effect of host genetics on gut microbial diversity, we performed a structural survey of the fecal microbiota of four purebred boar pig lines: Duroc, Landrace, Hampshire and Yorkshire. The V3-V4 regions of the 16S rRNA genes were amplified and sequenced. A total of 783 OTUs were shared by all breeds, whereas other OTUs were breed-specific. Firmicutes and Bacteroidetes dominated the majority of the fecal microbiota; Clostridia, Bacilli and Bacteroidia were the major classes. Nine predominant genera were observed in all breeds and eight of them can produce short-chain fatty acids (SCFAs)...
February 23, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28231575/individual-biomarkers-using-molecular-personalized-medicine-approaches
#2
Hans P Zenner
Molecular personalized medicine tries to generate individual predictive biomarkers to assist doctors in their decision making. These are thought to improve the efficacy and lower the toxicity of a treatment. The molecular basis of the desired high-precision prediction is modern "omex" technologies providing high-throughput bioanalytical methods. These include genomics and epigenomics, transcriptomics, proteomics, metabolomics, microbiomics, imaging, and functional analyses. In most cases, producing big data also requires a complex biomathematical analysis...
February 24, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28231472/effects-of-nasal-instillation-of-a-nitric-oxide-releasing-solution-or-parenteral-administration-of-tilmicosin-on-the-nasopharyngeal-microbiota-of-beef-feedlot-cattle-at-high-risk-of-developing-respiratory-tract-disease
#3
E Timsit, M Workentine, T Crepieux, C Miller, G Regev-Shoshani, A Schaefer, T Alexander
Nitric oxide has bactericidal and virucidal properties. Nasal instillation of a nitric oxide releasing solution (NORS) on arrival at the feedlot was recently reported as inferior to a parenteral injection of tilmicosin (macrolide antibiotic) for control of bovine respiratory disease (BRD) in cattle at high-risk of developing BRD. We hypothesized that this inferiority was due to differences between treatments with regards to their effects on the nasopharyngeal microbiota. The objective was to compare nasal instillation of NORS versus parenteral administration of tilmicosin regarding their effects on the nasopharyngeal microbiota of feedlot cattle at high-risk of developing BRD...
February 9, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28231283/rapid-evolution-of-distinct-helicobacter-pylori-subpopulations-in-the-americas
#4
Kaisa Thorell, Koji Yahara, Elvire Berthenet, Daniel J Lawson, Jane Mikhail, Ikuko Kato, Alfonso Mendez, Cosmeri Rizzato, María Mercedes Bravo, Rumiko Suzuki, Yoshio Yamaoka, Javier Torres, Samuel K Sheppard, Daniel Falush
For the last 500 years, the Americas have been a melting pot both for genetically diverse humans and for the pathogenic and commensal organisms associated with them. One such organism is the stomach-dwelling bacterium Helicobacter pylori, which is highly prevalent in Latin America where it is a major current public health challenge because of its strong association with gastric cancer. By analyzing the genome sequence of H. pylori isolated in North, Central and South America, we found evidence for admixture between H...
February 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28231175/mushroom-polysaccharides-chemistry-and-antiobesity-antidiabetes-anticancer-and-antibiotic-properties-in-cells-rodents-and-humans
#5
REVIEW
Mendel Friedman
More than 2000 species of edible and/or medicinal mushrooms have been identified to date, many of which are widely consumed, stimulating much research on their health-promoting properties. These properties are associated with bioactive compounds produced by the mushrooms, including polysaccharides. Although β-glucans (homopolysaccharides) are believed to be the major bioactive polysaccharides of mushrooms, other types of mushroom polysaccharides (heteropolysaccharides) also possess biological properties. Here we survey the chemistry of such health-promoting polysaccharides and their reported antiobesity and antidiabetic properties as well as selected anticarcinogenic, antimicrobial, and antiviral effects that demonstrate their multiple health-promoting potential...
November 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28230784/the-effects-of-moderate-whole-grain-consumption-on-fasting-glucose-and-lipids-gastrointestinal-symptoms-and-microbiota
#6
Danielle N Cooper, Mary E Kable, Maria L Marco, Angela De Leon, Bret Rust, Julita E Baker, William Horn, Dustin Burnett, Nancy L Keim
This study was designed to determine if providing wheat, corn, and rice as whole (WG) or refined grains (RG) under free-living conditions will change parameters of health over a six-week intervention in healthy, habitual non-WG consumers. Measurements of body composition, fecal microbiota, fasting blood glucose, total cholesterol, high density lipoprotein (HDL), low density lipoprotein (LDL), and triglycerides were made at baseline and post intervention. Subjects were given adequate servings of either WG or RG products based on their caloric need and asked to keep records of grain consumption, bowel movements, and GI symptoms weekly...
February 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28230723/bifidobacterium-adolescentis-exerts-strain-specific-effects-on-constipation-induced-by-loperamide-in-balb-c-mice
#7
Linlin Wang, Lujun Hu, Qi Xu, Boxing Yin, Dongsheng Fang, Gang Wang, Jianxin Zhao, Hao Zhang, Wei Chen
Constipation is one of the most common gastrointestinal complaints worldwide. This study was performed to determine whether Bifidobacterium adolescentis exerts inter-strain differences in alleviating constipation induced by loperamide in BALB/c mice and to analyze the main reasons for these differences. BALB/c mice underwent gavage with B. adolescentis (CCFM 626, 667, and 669) once per day for 17 days. The primary outcome measures included related constipation indicators, and the secondary outcome measures were the basic biological characteristics of the strains, the concentration changes of short-chain fatty acids in feces, and the changes in the fecal flora...
February 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28230610/16s-rdna-gene-sequencing-analysis-in-functional-dyspepsia-treated-with-fecal-microbiota-transplantation
#8
Jiayi Wang, Jianlei Gu, Yizhong Wang, Kai Lin, Shiyi Liu, Hui Lu, Ting Zhang, Guangjun Yu
No abstract text is available yet for this article.
March 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28230180/assessment-of-chicken-carcass-microbiome-responses-during-processing-in-the-presence-of-commercial-antimicrobials-using-a-next-generation-sequencing-approach
#9
Sun Ae Kim, Si Hong Park, Sang In Lee, Casey M Owens, Steven C Ricke
The purpose of this study was to 1) identify microbial compositional changes on chicken carcasses during processing, 2) determine the antimicrobial efficacy of peracetic acid (PAA) and Amplon (blend of sulfuric acid and sodium sulfate) at a poultry processing pilot plant scale, and 3) compare microbial communities between chicken carcass rinsates and recovered bacteria from media. Birds were collected from each processing step and rinsates were applied to estimate aerobic plate count (APC) and Campylobacter as well as Salmonella prevalence...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230078/unravelling-the-metabolic-impact-of-sbs-associated-microbial-dysbiosis-insights-from-the-piglet-short-bowel-syndrome-model
#10
Prue M Pereira-Fantini, Sean G Byars, James Pitt, Susan Lapthorne, Fiona Fouhy, Paul D Cotter, Julie E Bines
Liver disease is a major source of morbidity and mortality in children with short bowel syndrome (SBS). SBS-associated microbial dysbiosis has recently been implicated in the development of SBS-associated liver disease (SBS-ALD), however the pathological implications of this association have not been explored. In this study high-throughput sequencing of colonic content from the well-validated piglet SBS-ALD model was examined to determine alterations in microbial communities, and concurrent metabolic alterations identified in urine samples via targeted mass spectrometry approaches (GC-MS, LC-MS, FIA-MS) further uncovered impacts of microbial disturbance on metabolic outcomes in SBS-ALD...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230052/unraveling-the-processes-shaping-mammalian-gut-microbiomes-over-evolutionary-time
#11
Mathieu Groussin, Florent Mazel, Jon G Sanders, Chris S Smillie, Sébastien Lavergne, Wilfried Thuiller, Eric J Alm
Whether mammal-microbiome interactions are persistent and specific over evolutionary time is controversial. Here we show that host phylogeny and major dietary shifts have affected the distribution of different gut bacterial lineages and did so on vastly different bacterial phylogenetic resolutions. Diet mostly influences the acquisition of ancient and large microbial lineages. Conversely, correlation with host phylogeny is mostly seen among more recently diverged bacterial lineages, consistent with processes operating at similar timescales to host evolution...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28229970/molecular-analysis-of-the-human-faecal-archaea-in-a-southern-indian-population
#12
Sandya B Rani, Ramadass Balamurugan, Balakrishnan S Ramakrishna
Archaea are an important constituent of the human gut microbiota, but there is no information on human gut archaea in an Indian population. In this study, faecal samples were obtained from different age groups (neonatal babies, preschool children, school-going children, adolescents, adults and elderly) of a southern Indian population, and from a tribal population also resident in southern India). 16S rRNA gene sequences specific to Archaea were amplified from pooled faecal DNA in each group, sequenced, and aligned against the NCBI database...
March 2017: Journal of Biosciences
https://www.readbyqxmd.com/read/28229543/developmental-trajectories-of-amphibian-microbiota-response-to-bacterial-therapy-depends-on-initial-community-structure
#13
Leyla R Davis, Laurent Bigler, Douglas C Woodhams
Improving host health through microbial manipulation requires untangling factors that shape the microbiome. There is currently little understanding of how initial community structure may drive the microbiota trajectory across host development or influence bacterial therapy. Probiotic baths of surface symbionts, Pseudomonas fluorescens and Flavobacterium johnsoniae were administered to 240 tadpoles of the midwife toad, Alytes obstetricans in semi-natural outdoor mesocosms originating from geographically and genetically distinct populations in Switzerland...
February 22, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28229287/role-of-neurochemicals-in-the-interaction-between-the-microbiota-and-the-immune-and-the-nervous-system-of-the-host-organism
#14
Alexander V Oleskin, Boris A Shenderov, Vladimir S Rogovsky
This work is concerned with the role of evolutionary conserved substances, neurotransmitters, and neurohormones, within the complex framework of the microbial consortium-immune system-nervous system axis in the human or animal organism. Although the operation of each of these systems per se is relatively well understood, their combined effects on the host organism still await further research. Drawing on recent research on host-produced and microbial low-molecular-weight neurochemicals such as biogenic amines, amino acids, and short-chain fatty acids (SCFAs), we suggest that these mediators form a part of a universal neurochemical "language...
February 22, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28229218/microbial-flora-and-resistance-in-ophthalmology-a-review
#15
REVIEW
Andrzej Grzybowski, Piotr Brona, Stephen Jae Kim
Antibiotic resistance in systemic infection is well-researched and well-publicized. Much less information is available on the resistance of normal ocular microbiome and that of ophthalmic infections. An understanding of the distribution of ocular microorganisms may help us in tailoring our empiric treatment, as well as in choosing effective pre-, peri- and postoperative management, to achieve the best results for patients. This study aims to summarize and review the available literature on the subject of normal ocular flora and its resistance, as well as the broader topic of antibiotic resistance in ophthalmology...
February 22, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28229114/the-trier-social-stress-test-principles-and-practice
#16
REVIEW
Andrew P Allen, Paul J Kennedy, Samantha Dockray, John F Cryan, Timothy G Dinan, Gerard Clarke
Researchers interested in the neurobiology of the acute stress response in humans require a valid and reliable acute stressor that can be used under experimental conditions. The Trier Social Stress Test (TSST) provides such a testing platform. It induces stress by requiring participants to make an interview-style presentation, followed by a surprise mental arithmetic test, in front of an interview panel who do not provide feedback or encouragement. In this review, we outline the methodology of the TSST, and discuss key findings under conditions of health and stress-related disorder...
February 2017: Neurobiology of Stress
https://www.readbyqxmd.com/read/28228752/intestinal-microbiota-and-weight-gain-in-preterm-neonates
#17
Silvia Arboleya, Pablo Martinez-Camblor, Gonzalo Solís, Marta Suárez, Nuria Fernández, Clara G de Los Reyes-Gavilán, Miguel Gueimonde
The involvement of the gut microbiota on weight-gain and its relationship with childhood undernutrition and growth has been reported. Thus, the gut microbiota constitutes a potential therapeutic target for preventing growth impairment. However, our knowledge in this area is limited. In this study we aimed at evaluating the relationship among early microbiota, growth, and development in preterm infants. To this end we assessed the levels of specific microorganisms by qPCR, and those of short chain fatty acids by mean of gas-chromatography, in feces from 63 preterm newborns and determined their weight-gain during the first months...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28228751/prospects-of-phage-application-in-the-treatment-of-acne-caused-by-propionibacterium-acnes
#18
REVIEW
Ewa Jończyk-Matysiak, Beata Weber-Dąbrowska, Maciej Żaczek, Ryszard Międzybrodzki, Sławomir Letkiewicz, Marzanna Łusiak-Szelchowska, Andrzej Górski
Propionibacterium acnes is associated with purulent skin infections, and it poses a global problem for both patients and doctors. Acne vulgaris (acne) remains a problem due to its chronic character and difficulty of treatment, as well as its large impact on patients' quality of life. Due to the chronic course of the disease, treatment is long lasting, and often ineffective. Currently there are data regarding isolation of P. acnes phages, and there have been numerous studies on phage killing of P. acnes, but no data are available on phage application specifically in acne treatment...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28228681/discovery-of-a-new-species-of-hermit-crab-of-the-genus-pylopaguropsis-alcock-1905-from-the-caribbean-den-commensal-or-cleaner-crustacea-anomura-paguridae
#19
Rafael Lemaitre
A new secretive, yet brightly colored hermit crab species of the family Paguridae, Pylopaguropsis mollymulleraesp. n., is fully described based on specimens from the reefs of Bonaire, Lesser Antilles, southern Caribbean Sea. Populations of this new species were discovered and photographed in the Bonaire National Marine Park under a large coral ledge, at a depth of 13.7 m, living in crevices known by scuba divers to serve as den to a pair of "flaming reef lobsters" Enoplometopus antillensis, or a "broad banded moray" Channomuraena vittata...
2017: ZooKeys
https://www.readbyqxmd.com/read/28228596/antimicrobials-from-human-skin-commensal-bacteria-protect-against-staphylococcus-aureus-and-are-deficient-in-atopic-dermatitis
#20
Teruaki Nakatsuji, Tiffany H Chen, Saisindhu Narala, Kimberly A Chun, Aimee M Two, Tong Yun, Faiza Shafiq, Paul F Kotol, Amina Bouslimani, Alexey V Melnik, Haythem Latif, Ji-Nu Kim, Alexandre Lockhart, Keli Artis, Gloria David, Patricia Taylor, Joanne Streib, Pieter C Dorrestein, Alex Grier, Steven R Gill, Karsten Zengler, Tissa R Hata, Donald Y M Leung, Richard L Gallo
The microbiome can promote or disrupt human health by influencing both adaptive and innate immune functions. We tested whether bacteria that normally reside on human skin participate in host defense by killing Staphylococcus aureus, a pathogen commonly found in patients with atopic dermatitis (AD) and an important factor that exacerbates this disease. High-throughput screening for antimicrobial activity against S. aureus was performed on isolates of coagulase-negative Staphylococcus (CoNS) collected from the skin of healthy and AD subjects...
February 22, 2017: Science Translational Medicine
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