DOCSLIB.ORG

2014 Kistler James 1041095

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

This electronic thesis or dissertation has been downloaded from the King’s Research Portal at https://kclpure.kcl.ac.uk/portal/ Defining oral microbiological health Kistler, James Oliver Awarding institution: King's College London The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without proper acknowledgement. END USER LICENCE AGREEMENT Unless another licence is stated on the immediately following page this work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licence. https://creativecommons.org/licenses/by-nc-nd/4.0/ You are free to copy, distribute and transmit the work Under the following conditions: Attribution: You must attribute the work in the manner specified by the author (but not in any way that suggests that they endorse you or your use of the work). Non Commercial: You may not use this work for commercial purposes. No Derivative Works - You may not alter, transform, or build upon this work. Any of these conditions can be waived if you receive permission from the author. Your fair dealings and other rights are in no way affected by the above. Take down policy If you believe that this document breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 06. Oct. 2021 DEFINING ORAL MICROBIOLOGICAL HEALTH James Oliver Kistler A thesis submitted in accordance with the requirements of the degree of Doctor of Philosophy in King’s College London January 2014 1 Abstract Background: The composition of the oral microbiota in periodontal health and the microbial changes associated with the early stages of gingivitis are poorly defined. Aims: The aims of this work were to: (i) characterise the bacterial composition of dental plaque in subjects with experimentally-induced gingivitis; (ii) identify candidate oral probiotic taxa; (iii) evaluate alternative approaches for oral Neisseria spp. differentiation. Methods: Twenty volunteers abstained from oral hygiene in the mandible for two weeks. Clinical indicators of inflammation were monitored and samples of plaque were analysed, together with 20 control samples from periodontitis patients, by pyrosequencing of 16S rRNA genes and culture. A panel of oral bacterial isolates were screened for inhibition of six indicator organisms using a deferred antagonism assay. Sequencing of seven ‘housekeeping’ genes and a ribosomal protein gene (rplF) were evaluated as methods to differentiate Neisseria species. Results: All volunteers developed gingivitis after two weeks. 344,267 16S rDNA sequences were clustered into a median of 299 species-level Operational Taxonomic Units (OTUs) per sample. Principal Coordinate Analysis plots revealed shifts in community structure with gingivitis development, and the mean Simpson’s inverse diversity index increased from 32 at baseline to 47.5 after two weeks (P<0.0001). Fusobacterium nucleatum subsp. polymorphum, Lautropia sp. HOTA94, Lachnospiraceae sp. HOT100 and Prevotella oulorum were significantly associated with gingivitis, whilst Rothia dentocariosa was health-associated. Of 80 isolates screened, two strains of Streptococcus cristatus and a Streptococcus sp. HOT071 strain, inhibited the growth of one or more of Streptococcus anginosus, 2 Solobacterium moorei, Porphyromonas gingivalis and Filifactor alocis. rplF gene sequences were found to reliably differentiate oral Neisseria species, although some taxonomic revision to the genus is indicated. Conclusions: A highly species-rich bacterial community in health-associated plaque was revealed and new health- and gingivitis-associated taxa were identified. Three strains were found with potential for use as oral probiotics. 3 Table of Contents Abstract .......................................................................................................................... 2 Table of Contents .......................................................................................................... 4 Table of Figures ............................................................................................................. 8 Table of Tables ............................................................................................................ 13 Acknowledgements ...................................................................................................... 15 Chapter 1: Introduction ............................................................................................. 17 1.1 The oral cavity and its resident microbiome ........................................................... 18 1.2 Dental plaque .............................................................................................................. 24 1.3 Methods for the characterisation and analysis of the oral microbiome ................ 29 1.3.1 Characterisation of human-associated microbial communities ............................ 29 1.3.2 Microscopy and culture methods .......................................................................... 31 1.3.3 Molecular methods ................................................................................................ 35 1.3.3.1 Culture-independent sequencing techniques ........................................................... 35 1.3.3.2 Other molecular methods ........................................................................................ 46 1.4 The oral microbiome in health .................................................................................. 48 1.4.1 Function of the oral microbiome in health ............................................................ 48 1.4.2 Current knowledge of the composition of the oral microbiome in health ............. 50 1.5 The oral microbiome in periodontal diseases .......................................................... 61 1.5.1 Gingivitis ............................................................................................................... 61 1.5.2 Periodontitis .......................................................................................................... 64 1.6 New approaches to maintain periodontal health ..................................................... 71 1.6.1 Conventional approaches for the prevention and control of periodontal diseases71 1.6.2 Oral probiotics and prebiotics .............................................................................. 72 1.6.2.1 Clinical trials of oral probiotics ............................................................................... 78 1.7 Oral bacterial commensals of the genus Neisseria .................................................. 84 1.7.1 Neisseria and the oral microbiome ....................................................................... 84 4 1.7.2 Taxonomy of the genus Neisseria .......................................................................... 85 1.7.3 Neisseria species found in the human oral cavity ................................................. 88 1.7.4 Molecular approaches to the identification and classification of oral Neisseria . 95 1.8 Aims ............................................................................................................................. 99 1.8.1 Specific aims .......................................................................................................... 99 Chapter 2: Analysis of the oral microbiota in experimental gingivitis ................ 101 2.1 Introduction .............................................................................................................. 101 2.2 Methods ..................................................................................................................... 103 2.2.1 Study design ......................................................................................................... 103 2.2.2 Subject recruitment.............................................................................................. 104 2.2.2.1 Periodontally healthy volunteers ........................................................................... 104 2.2.2.2 Patients with chronic periodontitis ........................................................................ 104 2.2.3 Experimental gingivitis........................................................................................ 105 2.2.4 Sample collection ................................................................................................ 106 2.2.4.1 Experimental gingivitis ......................................................................................... 106 2.2.4.2 Chronic periodontitis ............................................................................................. 107 2.2.5 DNA extraction .................................................................................................... 107 2.2.6 16S rRNA gene PCR and 454 pyrosequencing .................................................... 108 2.2.7 Sequence analysis ................................................................................................ 109 2.2.8 Statistical analysis ............................................................................................... 111 2.2.9 Bacterial culture analysis .................................................................................... 112 2.2.10 Investigation of potentially novel oral taxa ......................................................... 114 2.3 Results ......................................................................................................................
Recommended publications
  • Tessaracoccus Arenae Sp. Nov., Isolated from Sea Sand

    Tessaracoccus Arenae Sp. Nov., Isolated from Sea Sand

    TAXONOMIC DESCRIPTION Thongphrom et al., Int J Syst Evol Microbiol 2017;67:2008–2013 DOI 10.1099/ijsem.0.001907 Tessaracoccus arenae sp. nov., isolated from sea sand Chutimon Thongphrom,1 Jong-Hwa Kim,1 Nagamani Bora2,* and Wonyong Kim1,* Abstract A Gram-stain positive, non-spore-forming, non-motile, facultatively anaerobic bacterial strain, designated CAU 1319T, was isolated from sea sand and the strain’s taxonomic position was investigated using a polyphasic approach. Strain CAU 1319T grew optimally at 30 C and at pH 7.5 in the presence of 2 % (w/v) NaCl. Phylogenetic analysis, based on the 16S rRNA gene sequence, revealed that strain CAU 1319T belongs to the genus Tessaracoccus, and is closely related to Tessaracoccus lapidicaptus IPBSL-7T (similarity 97.69 %), Tessaracoccus bendigoensis Ben 106T (similarity 95.64 %) and Tessaracoccus T T flavescens SST-39 (similarity 95.84 %). Strain CAU 1319 had LL-diaminopimelic acid as the diagnostic diamino acid in the cell-wall peptidoglycan, MK-9 (H4) as the predominant menaquinone, and anteiso-C15 : 0 as the major fatty acid. The polar lipids consisted of phosphatidylglycerol, phosphatidylinositol, two unidentified aminolipids, three unidentified phospholipids and one unidentified glycolipid. Predominant polyamines were spermine and spermidine. The DNA–DNA hybridization value between strain CAU 1319T and T. lapidicaptus IPBSL-7T was 24 %±0.2. The DNA G+C content of the novel strain was 69.5 mol %. On the basis of phenotypic and chemotaxonomic properties, as well as phylogenetic relatedness, strain CAU 1319Tshould be classified as a novel species of the genus Tessaracoccus, for which the name Tessaracoccus arenae sp.
  • WO 2015/066625 Al 7 May 2015 (07.05.2015) P O P C T

    WO 2015/066625 Al 7 May 2015 (07.05.2015) P O P C T

    (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2015/066625 Al 7 May 2015 (07.05.2015) P O P C T (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every C12Q 1/04 (2006.01) G01N 33/15 (2006.01) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (21) International Application Number: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, PCT/US2014/06371 1 DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (22) International Filing Date: HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 3 November 20 14 (03 .11.20 14) KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, (25) Filing Language: English PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, (26) Publication Language: English SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: 61/898,938 1 November 2013 (01. 11.2013) (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (71) Applicant: WASHINGTON UNIVERSITY [US/US] GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, One Brookings Drive, St.
  • Macellibacteroides Fermentans Gen. Nov., Sp. Nov., a Member of the Family Porphyromonadaceae Isolated from an Upflow Anaerobic Filter Treating Abattoir Wastewaters

    Macellibacteroides Fermentans Gen. Nov., Sp. Nov., a Member of the Family Porphyromonadaceae Isolated from an Upflow Anaerobic Filter Treating Abattoir Wastewaters

    International Journal of Systematic and Evolutionary Microbiology (2012), 62, 2522–2527 DOI 10.1099/ijs.0.032508-0 Macellibacteroides fermentans gen. nov., sp. nov., a member of the family Porphyromonadaceae isolated from an upflow anaerobic filter treating abattoir wastewaters Linda Jabari,1,2 Hana Gannoun,2 Jean-Luc Cayol,1 Abdeljabbar Hedi,1 Mitsuo Sakamoto,3 Enevold Falsen,4 Moriya Ohkuma,3 Moktar Hamdi,2 Guy Fauque,1 Bernard Ollivier1 and Marie-Laure Fardeau1 Correspondence 1Aix-Marseille Universite´ du Sud Toulon-Var, CNRS/INSU, IRD, MIO, UM 110, Case 925, Marie-Laure Fardeau 163 Avenue de Luminy, 13288 Marseille Cedex 9, France [email protected] 2Laboratoire d’Ecologie et de Technologie Microbienne, Institut National des Sciences Applique´es et de Technologie, Centre Urbain Nord, BP 676, 1080 Tunis Cedex, Tunisia 3Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center 2-1 Hirosawa, Wako, Saitama 351-0198, Japan 4CCUG, Culture Collection, Department of Clinical Bacteriology, University of Go¨teborg, 41346 Go¨teborg, Sweden A novel obligately anaerobic, non-spore-forming, rod-shaped mesophilic bacterium, which stained Gram-positive but showed the typical cell wall structure of Gram-negative bacteria, was isolated from an upflow anaerobic filter treating abattoir wastewaters in Tunisia. The strain, designated LIND7HT, grew at 20–45 6C (optimum 35–40 6C) and at pH 5.0–8.5 (optimum pH 6.5–7.5). It did not require NaCl for growth, but was able to grow in the presence of up to 2 % NaCl. Sulfate, thiosulfate, elemental sulfur, sulfite, nitrate and nitrite were not used as terminal electron acceptors.
  • Bacterial Community Structure in Waste Water Treatment

    Bacterial Community Structure in Waste Water Treatment

    International Journal of Research Studies in Microbiology and Biotechnology (IJRSMB) Volume 3, Issue 1, 2017, PP 1-9 ISSN 2454-9428 (Online) http://dx.doi.org/10.20431/2454-9428.0301001 www.arcjournals.org Bacterial Community Structure in Waste Water Treatment Hiral Borasiya & Shah MP Division of Applied & Environmental Microbiology, Enviro Technology Limited, Industrial Waste Water Research Laboratory, Gujarat, India [email protected] Abstract: All data suggest that microbial community structures or samples of sludge with a content of phosphate between 8 and 12% were very similar but distinct from those containing phosphate at 1.8%. In all samples analyzed, ubiquinones, menaquinone and fatty acids were the main components. Dominance and E5 suggested that a large number of organisms belonging to the b and subclasses Proteobacteria and Actinobacteria from higher GMC Gram-positive bacteria, respectively, were present. Denaturing gradient gel electrophoresis analysis revealed at least 6-10 predominant DNA bands and numerous other fragments in each sample. Five major denaturing gradient gel electrophoresis fragments from each of 1.8% and 11.8% phosphate containing sludge samples, respectively, were successfully isolated and sequenced. Phylogenetic analysis of the sequences revealed that both 3% and 15% phosphate -containing sludge samples shared three common phylotypes which are separately associated with new bacterial groups of subclass C Proteobacteria, two E5 containing Actinobacteria, and Caulobacter spp. The subclass Proteobacteria. Phylogenetic analysis revealed useful phylotypes unique for both samples sludge. Therefore, changes in the phosphate content did not affect the composition and quantity prevailing microbial population, although specific phylotypes could not be unambiguously associated with EBPR.
  • July 26, 2017 Bruker Daltonik Gmbh Mr. David Cromwick Director Of

    July 26, 2017 Bruker Daltonik Gmbh Mr. David Cromwick Director Of

    DEPARTMENT OF HEALTH & HUMAN SERVICES Public Health Service __________________________________________________________________________________________________________________________ Food and Drug Administration 10903 New Hampshire Avenue Document Control Center – WO66-G609 Silver Spring, MD 20993-0002 July 26, 2017 Bruker Daltonik GmbH Mr. David Cromwick Director of Quality 40 Manning Rd Billerica, MA 01821 US Re: K163536 Trade/Device Name: MALDI Biotyper CA (MBT-CA) System, MBT smart CA System Regulation Number: 21 CFR 866.3361 Regulation Name: Mass spectrometer system for clinical use for the identification of microorganisms Regulatory Class: II Product Code: PEX Dated: December 16, 2016 Received: December 16, 2016 Dear Mr. Cromwick: We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading. If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls.
  • Forensic Microbiology Reveals That Neisseria Animaloris Infections In

    Forensic Microbiology Reveals That Neisseria Animaloris Infections In

    www.nature.com/scientificreports OPEN Forensic microbiology reveals that Neisseria animaloris infections in harbour porpoises follow traumatic Received: 14 February 2019 Accepted: 20 September 2019 injuries by grey seals Published: xx xx xxxx Geofrey Foster 1, Adrian M. Whatmore2, Mark P. Dagleish3, Henry Malnick4, Maarten J. Gilbert5, Lineke Begeman6, Shaheed K. Macgregor7, Nicholas J. Davison1, Hendrik Jan Roest8, Paul Jepson7, Fiona Howie9, Jakub Muchowski2, Andrew C. Brownlow1, Jaap A. Wagenaar5,8, Marja J. L. Kik10, Rob Deaville7, Mariel T. I. ten Doeschate1, Jason Barley1,11, Laura Hunter1 & Lonneke L. IJsseldijk 10 Neisseria animaloris is considered to be a commensal of the canine and feline oral cavities. It is able to cause systemic infections in animals as well as humans, usually after a biting trauma has occurred. We recovered N. animaloris from chronically infamed bite wounds on pectoral fns and tailstocks, from lungs and other internal organs of eight harbour porpoises. Gross and histopathological evidence suggest that fatal disseminated N. animaloris infections had occurred due to traumatic injury from grey seals. We therefore conclude that these porpoises survived a grey seal predatory attack, with the bite lesions representing the subsequent portal of entry for bacteria to infect the animals causing abscesses in multiple tissues, and eventually death. We demonstrate that forensic microbiology provides a useful tool for linking a perpetrator to its victim. Moreover, N. animaloris should be added to the list of potential zoonotic bacteria following interactions with seals, as the fnding of systemic transfer to the lungs and other tissues of the harbour porpoises may suggest a potential to do likewise in humans.
  • Table S5. the Information of the Bacteria Annotated in the Soil Community at Species Level

    Table S5. the Information of the Bacteria Annotated in the Soil Community at Species Level

    Table S5. The information of the bacteria annotated in the soil community at species level No. Phylum Class Order Family Genus Species The number of contigs Abundance(%) 1 Firmicutes Bacilli Bacillales Bacillaceae Bacillus Bacillus cereus 1749 5.145782459 2 Bacteroidetes Cytophagia Cytophagales Hymenobacteraceae Hymenobacter Hymenobacter sedentarius 1538 4.52499338 3 Gemmatimonadetes Gemmatimonadetes Gemmatimonadales Gemmatimonadaceae Gemmatirosa Gemmatirosa kalamazoonesis 1020 3.000970902 4 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sphingomonas indica 797 2.344876284 5 Firmicutes Bacilli Lactobacillales Streptococcaceae Lactococcus Lactococcus piscium 542 1.594633558 6 Actinobacteria Thermoleophilia Solirubrobacterales Conexibacteraceae Conexibacter Conexibacter woesei 471 1.385742446 7 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sphingomonas taxi 430 1.265115184 8 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sphingomonas wittichii 388 1.141545794 9 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sphingomonas sp. FARSPH 298 0.876754244 10 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sorangium cellulosum 260 0.764953367 11 Proteobacteria Deltaproteobacteria Myxococcales Polyangiaceae Sorangium Sphingomonas sp. Cra20 260 0.764953367 12 Proteobacteria Alphaproteobacteria Sphingomonadales Sphingomonadaceae Sphingomonas Sphingomonas panacis 252 0.741416341
  • Pocket Guide to Clinical Microbiology

    Pocket Guide to Clinical Microbiology

    4TH EDITION Pocket Guide to Clinical Microbiology Christopher D. Doern 4TH EDITION POCKET GUIDE TO Clinical Microbiology 4TH EDITION POCKET GUIDE TO Clinical Microbiology Christopher D. Doern, PhD, D(ABMM) Assistant Professor, Pathology Director of Clinical Microbiology Virginia Commonwealth University Health System Medical College of Virginia Campus Washington, DC Copyright © 2018 Amer i can Society for Microbiology. All rights re served. No part of this publi ca tion may be re pro duced or trans mit ted in whole or in part or re used in any form or by any means, elec tronic or me chan i cal, in clud ing pho to copy ing and re cord ing, or by any in for ma tion stor age and re trieval sys tem, with out per mis sion in writ ing from the pub lish er. Disclaimer: To the best of the pub lish er’s knowl edge, this pub li ca tion pro­ vi des in for ma tion con cern ing the sub ject mat ter cov ered that is ac cu rate as of the date of pub li ca tion. The pub lisher is not pro vid ing le gal, med i cal, or other pro fes sional ser vices. Any ref er ence herein to any spe cific com mer cial prod ucts, pro ce dures, or ser vices by trade name, trade mark, man u fac turer, or oth er wise does not con sti tute or im ply en dorse ment, rec om men da tion, or fa vored sta tus by the Ameri can Society for Microbiology (ASM).
  • A New Symbiotic Lineage Related to Neisseria and Snodgrassella Arises from the Dynamic and Diverse Microbiomes in Sucking Lice

    A New Symbiotic Lineage Related to Neisseria and Snodgrassella Arises from the Dynamic and Diverse Microbiomes in Sucking Lice

    bioRxiv preprint doi: https://doi.org/10.1101/867275; this version posted December 6, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. A new symbiotic lineage related to Neisseria and Snodgrassella arises from the dynamic and diverse microbiomes in sucking lice Jana Říhová1, Giampiero Batani1, Sonia M. Rodríguez-Ruano1, Jana Martinů1,2, Eva Nováková1,2 and Václav Hypša1,2 1 Department of Parasitology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic 2 Institute of Parasitology, Biology Centre, ASCR, v.v.i., České Budějovice, Czech Republic Author for correspondence: Václav Hypša, Department of Parasitology, University of South Bohemia, České Budějovice, Czech Republic, +42 387 776 276, [email protected] Abstract Phylogenetic diversity of symbiotic bacteria in sucking lice suggests that lice have experienced a complex history of symbiont acquisition, loss, and replacement during their evolution. By combining metagenomics and amplicon screening across several populations of two louse genera (Polyplax and Hoplopleura) we describe a novel louse symbiont lineage related to Neisseria and Snodgrassella, and show its' independent origin within dynamic lice microbiomes. While the genomes of these symbionts are highly similar in both lice genera, their respective distributions and status within lice microbiomes indicate that they have different functions and history. In Hoplopleura acanthopus, the Neisseria-related bacterium is a dominant obligate symbiont universally present across several host’s populations, and seems to be replacing a presumably older and more degenerated obligate symbiont.
  • Raineyella Antarctica Gen. Nov., Sp. Nov., a Psychrotolerant, D-Amino

    Raineyella Antarctica Gen. Nov., Sp. Nov., a Psychrotolerant, D-Amino

    International Journal of Systematic and Evolutionary Microbiology (2016), 66, 5529–5536 DOI 10.1099/ijsem.0.001552 Raineyella antarctica gen. nov., sp. nov., a psychrotolerant, D-amino-acid-utilizing anaerobe isolated from two geographic locations of the Southern Hemisphere Elena Vladimirovna Pikuta,1 Rodolfo Javier Menes,2 Alisa Michelle Bruce,3† Zhe Lyu,4 Nisha B. Patel,5 Yuchen Liu,6 Richard Brice Hoover,1 Hans-Jürgen Busse,7 Paul Alexander Lawson5 and William Barney Whitman4 Correspondence 1Department of Mathematical, Computer and Natural Sciences, Athens State University, Athens, Elena Vladimirovna Pikuta AL 35611, USA [email protected] 2Catedra de Microbiología, Facultad de Química y Facultad de Ciencias, UDELAR, 11800 or Montevideo, Uruguay [email protected] 3Biology Department, University of Alabama in Huntsville, Huntsville, AL 35899, USA 4Microbiology Department, University of Georgia in Athens, Athens, GA 30602, USA 5Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, USA 6Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA 7Institut für Mikrobiologie - Veterinarmedizinische€ Universitat€ Wien, A-1210 Wien, Austria A Gram-stain-positive bacterium, strain LZ-22T, was isolated from a rhizosphere of moss Leptobryum sp. collected at the shore of Lake Zub in Antarctica. Cells were motile, straight or pleomorphic rods with sizes of 0.6–1.0Â3.5–10 µm. The novel isolate was a facultatively anaerobic, catalase-positive, psychrotolerant mesophile. Growth was observed at 3–41 C (optimum 24–28 C), with 0–7 % (w/v) NaCl (optimum 0.25 %) and at pH 4.0–9.0 (optimum pH 7.8). The quinone system of strain LZ-22T possessed predominately menaquinone MK-9(H4).
  • Oral Microbiome in HIV-Associated Periodontitis

    Oral Microbiome in HIV-Associated Periodontitis

    Oral microbiome in HIV-associated periodontitis. Marc Noguera-Julian, IrsiCaixa AIDS Research Institute Yolanda Guillén, IrsiCaixa AIDS Research Institute Jessica Peterson, Emory University David Reznik, Emory University Erica V. Harris, Emory University Sandeep J. Joseph, Emory University Javier Rivera, IrsiCaixa AIDS Research Institute Sunil Kannanganat, Emory University Rama Amara, Emory University Minhly Nguyen, Emory University Only first 10 authors above; see publication for full author list. Journal Title: Medicine Volume: Volume 96, Number 12 Publisher: Wolters Kluwer Health | 2017-03, Pages e5821-e5821 Type of Work: Article | Final Publisher PDF Publisher DOI: 10.1097/MD.0000000000005821 Permanent URL: https://pid.emory.edu/ark:/25593/s0xtw Final published version: http://dx.doi.org/10.1097/MD.0000000000005821 Copyright information: © 2017 the Author(s). Published by Wolters Kluwer Health, Inc. This is an Open Access work distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/). Accessed September 29, 2021 5:15 AM EDT ® Observational Study Medicine OPEN Oral microbiome in HIV-associated periodontitis ∗ Marc Noguera-Julian, PhDa,b,c, , Yolanda Guillén, PhDa,b, Jessica Peterson, BsCd, David Reznik, DDSd,e, Erica V. Harris, BsCf, Sandeep J. Joseph, PhDd, Javier Rivera, MsCa,c, Sunil Kannanganat, PhDd,g, Rama Amara, PhDd,g, Minh Ly Nguyen, MDd, Simon Mutembo, MDh, Roger Paredes, MD, PhDa,b,c,i, ∗ Timothy D. Read, PhDd, Vincent C. Marconi, MDd,g, Abstract HIV-associated periodontal diseases (PD) could serve as a source of chronic inflammation. Here, we sought to characterize the oral microbial signatures of HIV+ and HIV– individuals at different levels of PD severity.
  • Taxonomic Binning Approaches and Functional Characteristics of the Microbial Community During the Anaerobic Digestion of Hydrolyzed Corncob

    Taxonomic Binning Approaches and Functional Characteristics of the Microbial Community During the Anaerobic Digestion of Hydrolyzed Corncob

    energies Article Taxonomic Binning Approaches and Functional Characteristics of the Microbial Community during the Anaerobic Digestion of Hydrolyzed Corncob Luz Breton-Deval 1 , Ilse Salinas-Peralta 1 , Jaime Santiago Alarcón Aguirre 2, Belkis Sulbarán-Rangel 2,* and Kelly Joel Gurubel Tun 2,* 1 Catedras Conacyt, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; [email protected] (L.B.-D.); [email protected] (I.S.-P.) 2 Department of Water and Energy, University of Guadalajara Campus Tonalá, Tonalá 45425, Mexico; [email protected] * Correspondence: [email protected] (B.S.-R.); [email protected] (K.J.G.T.); Tel.: +52-33-2000-2300 (K.J.G.T.) Abstract: Maize forms the basis of Mexican food. As a result, approximately six million tons of corncob are produced each year, which represents an environmental issue, as well as a potential feedstock for biogas production. This research aimed to analyze the taxonomic and functional shift in the microbiome of the fermenters using a whole metagenome shotgun approach. Two strategies were used to understand the microbial community at the beginning and the end of anaerobic digestion: (i) phylogenetic analysis to infer the presence and coverage of clade-specific markers to assign taxonomy and (ii) the recovery of the individual genomes from the samples using the binning of the assembled scaffolds. The results showed that anaerobic digestion brought some noticeable changes and the main microbial community was composed of Corynebacterium variable, Desulfovibrio desulfuricans, Vibrio furnissii, Shewanella spp., Actinoplanes spp., Pseudoxanthomonas spp., Saccharomonospora azurea, Citation: Breton-Deval, L.; Agromyces spp., Serinicoccus spp., Cellulomonas spp., Pseudonocardia spp., Rhodococcus rhodochrous, Salinas-Peralta, I.; Alarcón Aguirre, Sphingobacterium spp.