Bergey Manual Of Systematic Bacteriology Flowchart
ADVERTISEMENTS:The below mentioned article provides an overview on Bergey’s manual of systematic bacteriology.Bergey’s manual, which first appeared in 1923 and, at present, is in its 9th edition under the title Bergey’s Manual of Systematic Bacteriology, is a major taxonomic treatment of bacteria (prokaryotes). This manual has served the community of microbiologists since more than 80 years and is a compendium of information on all recognized species of bacteria (prokaryotes).Any discussion dealing with bacterial (prokaryotic) classification cannot go without a thorough acquaintance with this manual. Each chapter of this treatise, written by an expert, contains tables, figures, and other systematic information useful for identification of bacteria. ADVERTISEMENTS:Many schemes for identification of bacteria have been devised prior to 1923 but all were usually fragmentary. There was need for a single scheme which could cover all the described bacteria. David Hendricks Bergey, a professor of bacteriology at the university of Pennsylvania (USA), proceeded in this direction and began preparing a complete review of the enormous literature of bacterial taxonomy.To aid the publication of this work, the Society of American Bacteriologists (now called the American Society of Microbiologists) appointed an Editorial Board headed by Bergey. This resulted in the publication of the first edition of Bergey’s Manual of Determinative Bacteriology in 1923.
Bergey's Manual Of Determinative Bacteriology 9th Edition DOWNLOAD (Mirror #1). Identification flow charts manual of determinative bacteriology all of the unknowns will fall into the following groups in manual of determinative bacteriology.
The second edition of the manual was published in 1925 and the third edition in 1930.In 1934, the Society of American Bacteriologists transferred to Dr. Bergey all its rights, title, and interests in the Manual in order to allow Bergey to create an independent, non-profit trust, namely, The Bergey’s Manual Trust. Throughout the years, this trust continues to prepare and publish successive editions of the manual and promotes research in the field of bacterial taxonomy.The first eight editions of this manual appeared under the title ‘Bergey’s Manual of Determinative Bacteriology’. The 9th edition was retitled and was published as the 1st edition under the title. ‘Bergey’s Manual of Systematic Bacteriology’, which consisted of four volumes published in 1984, 1986, 1989, and 1991, respectively. This infect was the first edition of the Manual under the changed title.
ADVERTISEMENTS:The change of the title of the manual from determinative bacteriology to systematic bacteriology indicates that manual’s usefulness is no longer restricted to a determinative role, i.e., mere identification, but it is now aimed at a systematic classification of bacteria.However, Bergey’s Manual of Systematic Bacteriology has appeared in the form of its 2nd edition consisting of five volumes; its first volume was published in 2001, second in 2005 and three additional volumes expected shortly. Bergey’s Manual of Systematic Bacteriology (First Edition):Phenetic Classification:The first edition of Bergey’s Manual of Systematic Bacteriology is primarily phenetic, i.e., based on the natural similarity of phenotypic characteristics of microorganisms, and has appeared in four volumes consisting of sections.The four volumes, their year of publication, and the sections and the groups of bacteria included in each of them are the following:Vol.
I: 1984 (sections 1-11): Gram-negative bacteria of general, medical, or industrial importance.Vol. II: 1986 (sections 12-17): Gram-positive bacteria other than actinomycetes.Vol. Ill: 1989 (sections 18-25): Gram-negative bacteria with distinctive properties, cyanobacteria, and archaea.Vol. IV: 1991 (sections 26-23): Actinomycetes (Gram-positive filamentous bacteria). ADVERTISEMENTS:Phylogenetic Classification:Prokaryotic taxonomy enjoyed enormous progress after the publication of the first edition of Bergey’s Manual of Systematic Bacteriology.
It became possible with the aid of newer molecular techniques such as the sequencing of ribosomal RNA (rRNA), DNA, and proteins. These techniques has made phylogenetic analysis of prokaryotes practicable.In the light of the availability of considerable knowledge of phylogenetic relationships amongst prokaryotes, the second edition of Bergey’s Manual of Systematic Bacteriology is largely phylogenetic rather than phenetic.As a result, the second edition is quite different from the first edition in the characteristics chosen as basis for classification. However, the second edition consists of five volumes. Its first volume was published in 2001, second in 2005, and three additional volumes expected shortly. IV: The High G + C Gram-positive BacteriaVol. V: The Planctomycetes, Spirochaetes, Fibrobacteres, Bacteriodetes, and Fusobacteria (Vol.
V also contains a section accommodating the update descriptions and phylogenetic arrangements that have been revised since publication of volume I)A Concise Account of the Classification:Volume I. The Archaea and the Deeply Branching and Phototrophic Bacteria:Domain Archaea:Phylum AI:Crenarchaeota:The phylum Crenarchaeota contains thermophilic and hyperthcrmophilic sulfur-metabolizing prokaryotes arranged in single class Thermoprotei divided into three orders and five families. The important genera are Thermoproteus, Desulgurococcus, Pyrodictium, and Sulfolobus.Phylum A II:Euryarchaeota:The phylum Euryarchaeota contains primarily methanogens and halophiles; thermophilic, sulfur-reducers also are included in this phylum. This phylum is divided into seven classes (Methanobacteria, Methanococci.
Halobacteria, Thermoplasmata, Thermococci, Archeoglobi, and Methanopyri), nine orders, and sixteen families.The representative genera of each class are Methanobacterium, Methanococcus, Halobacterium, Thermophasma, Thermococcus, Archaeoglobus, and Methanopyrus, respectively.Domain: Bacteria:Phylum BI. Aquificae:The phylum Aquificae has one class (Aquificae) that contains autotrophic bacteria possessing ability to use hydrogen for energy production. Aquifex and Hydrogenobacter are the representative genera. Aquifex means “water maker” as this genus reduces oxygen by using hydrogen and produces water.Phylum BII:Thermotogae:The phylum thermotogae consists of one class (Thermotogae).
It contains anaerobic, thermophilic, fermentative, gram-negative bacteria. The representative genera are Thermotoga, Geotoga, Fervidobacterium, etc.Phylum Bill:Thermodesulfobacteria:This phylum contains one class (Thermodesulfobacteria) and only two genera, Thermodesulfobacterium and Thermodesulfatator. The bacteria are anaerobic, thermophilic, and sulfate-reducing.Phylum BIV:Dienococcus-Thermus:The phylum contains one class (Dienococci).
The representative genera are Dienococcus, Thermus, Marinithermus, etc. The bacteria are gram-positive and extraordinarily radiation resistant.Phylum BVI:Chloroflexi:The phylum Chloroflexi consists of two classes (Chloroflexi and Anaerolieae). Many members of this phylum are gram-negative and are called green nonsulfur bacteria. The important genera are Chloroflexus, Oscillochloris, Herpetosiphon and Anaerolinea.Phylum BVII:Thermomicrobia:The phylum contains one class (Thermomicrobia) and is represented by a single genus, Thermomicrobium. Thermomicrobium is an aerobic thermophilic chemotroph possessing unusual lipids that contain 1, 2-dialcohols instead of glycerol, and have neither ester nor ether linkages.This is in contrast to the lipids of Bacteria and Eukarya that contain fatty acids esterified to glucose. Also, the cells of Thermomicrobium differ from those of Bacteria in that they lack peptidoglycan in their cell walls.Phylum B VIII:Nitrospirae:The phylum consists of one class (Nitrospira) and genera like Nitrospira and Leptospirillum.Phylum BIX:Deferribacteres:The phylum Deferribacteres contains one class (Deferribacteres) and genera such as Deferribacter, Denitrovibrio, etc.Phylum BX:Cyanobacteria:The phylum Cyanobacteria consists of a single class (Cyanobacteria) divided into five subsections.
The taxonomic position of the cyanobacteria is left open in Bergey s Manual. The cyanobacteria are oxygenic phototrophs and show a distant relationship to gram-positive bacteria.These organisms were the first oxygen-evolving phototrophs on Earth and were responsible for the conversion of the anoxic atmosphere of our planet to oxic. Genera belonging to this phylum are mentioned as “form genus” in the Manual because the latter refers to a group of cyanobaceria with very characteristic morphology found worldwide but not all isolates of such a type may actually fit into the same genus.The important “form genera” are Microcytis, Cyanocytis, Lyngbya, Oscillatoria, Spirulina, Anabaena, Nostoc, Scytonema, Calothrix, Tolypothrix, etc.Phylum B XI. Chlorobi:Only one class (Chlorobia) constitutes the phylum.
The representative genera are Chlorobium, Pelodictyon, Chlorobaculum, etc. ADVERTISEMENTS:Phylum B XIX:Acidobacteria:The phylum contains only one class (Acidobacteria) represented by three genera named Acidobacterium, Geothrix and Holophaga.Phylum B XX:Bacteroidetes:The phylum is divided into three classes (Bacteroides, Flavobacteria, and Sphingobacteria) exemplified by genera like Bacteroides, Flavobacterium, Flexibacter, Cytophaga, Toxothrix, etc. Flexibacter and Cytophaga are gliding bacteria and are ecologically significant.Phylum B XXI:Fusobacteria:The phylum contains one class (Fusobacteria) with genera like Fusobacterium, Leptotrichia, and Cetobacterium.
Fusobacterium is filamentous and occurs in the oral cavity of humans.Phylum B XXII:Verrucomicrobia:This phylum consists of a single class (Verrucomicrobiae) and genera such as Verrucomicrobium, Prosthecobacter, and Xiphinematobacter. Members form cytoplasmic appendages called prosthecae and divide symmetricaly.Phylum B XXIII:Dictyoglomus:The phylum is represented by a single class (Dictyoglomi) consisting of a single genes named Dictyogomus.
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