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Home › Health › Microbes › Bacteria › Bergey’s Classification of Bacteria

Bergey’s Classification of Bacteria

Classification of bacteria according to Bergey’s Manual [Bergey’s Manual of Systematic Bacteriology. 1st edition. 4 vols. (1984)]

  1. Gram-negative Bacteria of medical and commercial importance: (1984)
    Spirochetes, spiral and curved, aerobic and facultatively aerobic rods, obligate anaerobes, aerobic and anaerobic cocci, sulfate and sulfur-reducing, rickettsias, clamydias, mycoplasmas

  2. Gram-positive Bacteria of medical and commercial importance: (1986)
    Cocci, endospore-forming and nonsporing rods, mycobacteria, nonfilamentous actinomycetes

Kingdom Procaryotae

Divisions

  1. Gracilicutes
    Procaryotes with thin cell walls, implying a gram-negative type cell wall

  2. Firmicutes
    Procaryotes with thick and strong skin, indicating a gram-positive type cell wall

  3. Tenericutes
    Procaryotes of a pliable and soft nature, indicating the lack of a rigid cell wall

  4. Mendosicutes
    Procaryotes that lack conventional peptidoglycan (archaeobacteria)
    Spirochetes

      Spirochaetales

        Spirochaetaceae

          Borrelia
          Cristispira
          Spirochaeta
          Treponema
        Leptospiraceae

          Leptospira
      Other: Hindgut Spirochetes of Termites and Cryptocercus punctulatus (wood-eating cockroach)
    Aerobic/Microaerophilic, Motile, Helical/Vibrioid Gram-Negative Bacteria

        Alteromonas
        Aquaspirillum
        Azospirillum
        Bdellovibrio
        Campylobacter
        Cellvibrio
        Halovibrio
        Helicobacter
        Herbaspirillum
        Marinomonas
        Micavibrio
        Oceanospirillum
        Spirillum
        Sporospirillum
        Vampirovibrio
    Nonmotile (or rarely), Gram-Negative Curved Bacteria

      Spirosomaceae

        Flectobacillus
        Runella
        Spirosoma

      Other Genera

        Ancyclobacter
        Brachyarcus
        Cyclobacterium
        Meniscus
        Microcyclus
        Pelosigma

    Gram-Negative Aerobic Rods and Cocci

      Pseudomonadaceae

        Frateuria
        Pseudomonas
        Xanthomonas
        Zooglea

      Azotobacteriaceae

        Azomonas
        Azotobacter

      Rhizobiaceae

        Agrobacterium
        Bradyrhizobium
        Phyllobacterium
        Rhizobium

      Methylococcaceae

        Methylococcus
        Methylomonas

      Acetobacteraceae

        Acetobacter
        Gluconobacter

      Halobacteriaceae

        Halobacterium
        Halococcus

      Legionellaceae

        Legionella

      Neisseriaceae

        Acinetobacter Kingella
        Moraxella
        Neisseria

      Other Genera

        Acidiphilium
        Acidomonas
        Acidothermus
        Afipia
        Agromonas
        Alcaligenes
        Alteromonas
        Aminobacter
        Aquaspirillum
        Azorhizobium
        Beijerinckia
        Bordetella
        Brucella
        Chromohalobacter
        Chryseomonas
        Comoamonas
        Cupriavidas
        Deleya
        Derxia
        Ensifer
        Erythrobacter
        Flavimonas
        Flavobacterium
        Francisella
        Halomonas
        Hydrogenophaga
        Janthinobacterium
        Lampropedia
        Marinobacter
        Marinomonas
        Mesophilobacter
        Methylobacillus
        Methylobacterium
        Methylophaga
        Methylophilus
        Methylovorus
        Morococcus
        Oceanospirillum
        Oligella
        Paracoccus
        Phenylobacterium
        Psychrobacter
        Rhizobacter
        Roseobacter
        Rugamonas
        Serpens
        Sinorhizobium
        Sphingobacterium
        Thermoleophilum
        Thermomicrobium
        Thermus
        Variovorax
        Volcaniella
        Weeksella
        Xanthobacter
        Xylella
        Xylophilus
        Zoogloea

    Facultatively Anaerobic Gram-Negative Rods

      Enterobacteriaceae

        Arsenophonus
        Budvicia
        Buttiauxella
        Cedecea
        Citrobacter
        Edwardsiella
        Enterobacter
        Erwinia
        Escherichia
        Ewingella
        Hafnia
        Klebsiella
        Kluyvera
        Leclercia
        Leminorella
        Moellerella
        Morganella
        Obesumbacterium
        Pantoea
        Pragia
        Proteus
        Providencia
        Rahnella
        Salmonella
        Serratia
        Shigella
        Tatumella
        Xenorhabdus
        Yersinia
        Yokenella

      Vibrionaceae

        Aeromonas
        Enhydrobacter
        Photobacterium
        Plesiomonas
        Vibrio

      Pasturellaceae

        Actinobacillus
        Haemophilus
        Pasteurella

      Other Genera

        Calymmatobacterium
        Cardiobacterium
        Cedecea
        Eikenella
        Gardnerella
        (has thin, gram-positive walls but stains as negative)
        Kluyvera
        Obesumbacterium
        Rahnella
        Streptobacillus
        Tatumella
        XenorhabdusChromobacterium
        Zymomonas

    Gram-Negative Anaerobic, Straight, Curved, and Helical Rods

      Bacteroidaceae

        Acetivibrio
        Acetoanaerobium
        Acetofilamentum
        Acetogenium
        Acetomicrobium
        Acetothermus
        Acidaminobacter
        Anaerobiospirillum
        Anaerorhabdus
        Anaerovibrio
        Bacteroides
        Butyrivibrio
        (has thin, gram-positive walls but stains as negative)
        Centipeda
        Fervidobacterium
        Fibrobacter
        Fusobacterium
        Haloanaerobium
        Halobacteroides
        Ilyobacter
        Lachnospira
        (has thin, gram-positive walls but stains as negative)
        Leptotrichia
        Malonomonas
        Megamonas
        Mitsuokella
        Oxalobacter
        Pectinatus
        Pelobacter
        Porphyromonas
        Prevotella
        Propionigenium
        Propionispira
        Rikenella
        Roseburia
        Ruminobacter
        Sebaldella
        Selenomonas
        Sporomusa
        Succinimonas
        Succinivibrio
        Syntrophobacter
        Syntrophosmonas
        Thermobacteroides
        Thermospipho
        Thermotoga
        Tissierella
        Wolinella
        Zymophilus

      Dissimulatory Sulfate- or Sulfur-Reducing Bacteria

        Desulfobacter
        Desulfobacterium
        Desulfobulbus
        Desulfococcus
        Desulfomicrobium
        Desulfomonas
        Desulfomonile
        Desulfonema
        Desulfosarcina
        Desulfotomaculum
        (also endospore-forming)
        Desulfovibrio
        Desulfurella
        Desulfuromonas
        Thermodesulfobacterium

      Anaerobic Gram-Negaitve Cocci

        Veillonellaceae

          Acidaminococcus
          Megasphaera
          Syntrophococcus
          Veillonella
    Rickettsias and Chlamydias

      Rickettsiales

        Rickettsiaceae

          Cowdria
          Coxiella
          Ehrlichia
          Neorickettsia
          Rickettsia
          Rickettsiella
          Rochalimaea
          Wolbachia

        Bartonellaceae

          Bartonella
          Grahamella

        Anaplasmataceae

          Aegyptianella
          Anaplasma
          Eperythrozoon
          Haemobartonella

      Chlamydiales

        Chlamydiaceae

          Chlamydia

    Mycoplasmas

      Mycoplasmataceae

        Mycoplasma
        Ureaplasma

      Acholeplasmataceae

        Acholeplasma

      Spiroplasmataceae

        Spiroplasma

      Other Genera

        Anaeroplasma
        Asteroleplasma
        Thermoplasma

    Endosymbionts

      Endosymbionts of Protozoa

        Caedibacter
        Holospora
        Lyticum
        Pseudocaedibacter
        Tectibacter

      Endosymbionts of Insects (blood sucking, plant sap-sucking, cellulose and stored grain feeders, and insects feeding on complex diets)

        Blattabacterium

      Endosymbionts of Fungi and Invertebrates other than Arthropods (Fungi, Sponges, Coelenterates, Helminthes, Annelids, Marine worms and mollusks)
      Endosymbionts of Protozoa, ciliates, flagellates, and amoebas

        Caedibacter
        Holospora
        Lyticum
        Pseudocaedibacter
        Tectibacter

    Gram-Positive Cocci

      Aerobic, Catalase-Positive Genera

        Deinobacter
        Deinococcus
        Marinococcus
        Micrococcus
        Planococcus
        Saccharococcus
        Staphylococcus
        Stomatococcus

      Aerotolerant, Catalase-Negative Genera

        Aerococcus Enterococcus
        Gemella
        Lactococcus
        Leuconostoc
        Melissococcus
        Pediococcus
        Streptococcus
        (Pyogenic Hemolytic Streptococci, Oral Streptococci, Enterococci, Lactic Acid Streptococci, Anaerobic Streptococci)
        Trichococcus
        Vagococcus

      Anaerobic, Catalase-Negative Genera

        Coprococcus
        Peptococcus
        Peptostreptococcus
        Ruminococcus
        Sarcina

    Endospore-Forming Gram-Positive Rods and Cocci

        Amphibacillus
        Bacillus
        Clostridium
        Desulfotomaculum
        (also dissimilatory sulfate reducer)
        Oscillospira
        Sporolactobacillus
        Sporosarcina
        Sulfidobacillus
        Syntrophospora

    Regular, Nonsporing Gram-Positive Rods

        Brochothrix
        Carnobacterium
        Caryophanon
        Erysipelothrix
        Kurthia
        Lactobacillus
        Listeria
        Renibacterium

    Irregular, Nonsporing Gram-Positive Rods

        Acetobacterium
        Acetogenium
        Actinomyces
        Aeromicrobium
        Agromyces
        Arachnia
        Arcanobacterium
        Arthrobacter
        Aureobacterium
        Bifidobacterium
        Brachybacterium
        Brevibacterium
        Butyrivibrio
        (has thin, gram-positive walls, but stains as negative)
        Caseobacter
        Cellulomonas
        Clavibacter
        Coriobacterium
        Corynebacterium
        Curtobacterium
        Dermabacter
        Eubacterium
        Exigouibacterium
        Falcivibrio
        Gardnerella
        (has thin, gram-positive walls but stains as negative)
        Jonesia
        Lachnospira
        (has thin, gram-positive walls but stains as negative)
        Microbacterium
        Mobiluncus
        Pimelobacter
        Propionibacterium
        Rarobacter
        Rothia
        Rubrobacter
        Sphaerobacter
        Terrabacter
        Thermoanaerobacter

    Mycobacteria

      Mycobacteriaceae

        Mycobacterium

    Nocardioforms

        Intrasporangium
        Micropolyspora
        Nocardia
        Nocardioides
        Oerskovia
        Promicromonospora
        Pseudonocardia
        Rhodococcus
        Saccharopolyspora

    Anoxygenic Phototrophic Bacteria

      Purple Sulfur Bacteria: Internal Sulfur Granules

        Chromatiaceae

          Amoebobacter
          Chromatium
          Lamprobacter
          Lamprocystis
          Thiocapsa
          Thiocystis
          Thiodictyon
          Thiopedia
          Thiospirillum
      Purple Sulfur Bacteria: External Sulfur Granules

        Ectothiorhodospiraceae

          Ectothiorhodopsin
          Ectothiorhodospira
      Purple Nonsulfur Bacteria

          Rhodobacter
          Rhodyclus
          Rhodomicrobium
          Rhodopila
          Rhodopseudomonas
          Rhodospirillum
      Green Nonsulfur Bacteria

          Heliobacillus
          Heliobacterium
      Green Sulfur Bacteria

          Anacalochloris
          Chlorobium
          Chloroherpeton
          Pelodictyon
          Prosthecochloris
      Multicellular Filamentous Green Bacteria

          Chloroflexus
          Chloronema
          Heliothrix
          Oscillochloris
      Anaerobic Chemotrophic Bacteria

          Erythrobacter

    Oxygenic Phototrophic Bacteria

      Cyanobacteria

        Chroococcales

          Chamaespiphon
          Cyanothece
          Gloeobacter
          Gloeocapsa
          Gloethece
          Microcystis
          Myxobaktron
          Synechococcus
          Synechocystis

        Pleurocapsales

          Chroococcidiopsis
          Dermocarpa
          Dermocarpella
          Myxosarcina
          Pleurocapsa
          Xenococcus

        Oscillatoriales

          Arthrospira
          Crinalium
          Lyngbya
          Microcoleus
          Oscillatoria
          Pseudanabaena
          Spirulina
          Starria
          Trichodesmium

        Nostocales

          Nostocaceae

            Anabaena
            Aphanizomenon
            Cylindrospermum
            Nodularia
            Nostoc

          Scytonemataceae

            Scytonema

          Rivulariaceae

            Calothrix

        Stigonematales

          Chlorogloeopsis
          Fischerella
          Geitleria
          Stigonema

        Prochlorales

          Prochloraceae

            Prochloron Prochlorothrix

    Aerobic Chemolithotrophic Bacteria and Associated Organisms

      Nitrifying Bacteria

        Nitrobacteraceae
      Nitrate-oxidizing bacteria

          Nitrobacter
          Nitrococcus
          Nitrospina
          Nitrospira

      Ammonia-oxidizing bacteria

          Nitrosococcus
          Nitrosolobus
          Nitrosomonas
          Nitrosospira
          Nitrosovibrio

      Colorless sulfur-oxidizing bacteria

          Acidiphilium
          Macromonas
          Thermothrix
          Thiobacillus
          Thiobacterium
          Thiodendron
          Thiomicrospira
          Thiosphaera
          Thiospira
          Thiovulum

      Obligate Chemolithotrophic Hydrogen Bacteria

          Hydrogenobacter

      Iron- and Manganese-oxidizing and/or -Depositing Bacteria

        Siderocapsaceae

          Aquaspirillum
          Bilophococcus
          Gallionella
          (both iron-oxidizing and appendaged)
          Leptospirillum
          Metallogenium
          Naumaniella
          Ochrobium
          Siderocapsa
          Siderococcus
          Sulfobacillus

    Budding (indicated by *) and/or Appendaged Bacteria

      Prosthecate Bacteria

          Ancalomicrobium *
          Asticcacaulus
          Caulobacter
          Dichotomicrobium
          Filomicrobium
          Hirschia
          Hyphomicrobium *
          Hyphomonas *
          Labrys *
          Pedomicrobium *
          Prosthecobacter
          Prosthecomicrobium *
          Stella *
          Verrucomicrobium

        Planctomycetales

          Gemmata
          Pirelulla

      Nonprosthecate Budding Bacteria

          Angulomicrobium
          Blastobacter
          Ensifer
          Gemmiger
          Isosphaera
          Planctomyces





    Nonbudding Bacteria

        Asticcacaulis
        Caulobacter
        Gallionella
        Nevskia
        Prosthecobacter

    Morphologically Unusual Budding Bacteria (involved in iron and manganese deposition)

        Caulococcus
        Kuznezovia
        Metallogenium
        Seliberia
        Thiodendron

    Sheathed Bacteria

        Clonothrix
        Crenothrix
        Haliscominobacter
        Leptothrix
        Lieskeela
        Phragmidiothrix
        Sphaerotilus

    Nonphotosynthetic, Nonfruiting Gliding Bacteria

      Single-celled, Rod-shaped Gliding Bacteria

        Cytophagales

          Cytophagaceae

            Capnocytophaga
            Chitinophaga
            Cytophaga
            Flexibacter
            Flexithrix
            Microscilla
            Sporocytophaga
            Thermonema

        Lysobacterales

          Lysobacteriaceae

            Lysobacter

      Flattened, Filamentous Gliding Bacteria

        Simonsiellaceae

          Alysiella
          Simonsiella

      Sulfur-Oxidizing Gliding Bacteria

        Beggiatoales

          Beggiatoaceae

            Achromatium
            Beggiatoa
            Thioploca
            Thiospirillopsis
            Thiothrix

      The Pelonemas

        Pelonemataceae

          Achroonema Desmanthus
          Pelonema
          Peloploca

        Other Genera

          Agitococcus
          Desulfonema
          Herpetosiphon
          Isosphaera
          Leucothrix
          Saprospira
          Toxothrix
          Vitreoscilla

    Gliding, Fruiting Bacteria

        Archangiaceae

          Archangium

        Cystobacteraceae

          Cystobacter
          Melittangium
          Stigmatella

      Myxococcales

        Myxococcaceae

          Myxococcus

        Polyangiaceae

          Chondromyces
          Nannocystis
          Polyangium

        Other Genera

          Angiococcus
          Corallococcus
          Haploangium
          Sorangium

Archaeobacteria (an older term for the Archaea)

    The Methanogens

      Cell Walls With Pseudomurein

        Methanobacteriales

          Methanobacteriaceae

            Methanobacterium
            Methanobrevibacter

          Methanothermaceae

            Methanothermus

      Cell Walls Without Pseudomurein

        Methanococcales

          Methanococcaceae

            Methanococcus

          Methanosarcinaceae

            Methanolacinia
            Methanococcoides
            Methanolobus
            Methanothrix

        Methanomicrobiales

          Methanomicrobiaceae

            Methanomicrobium
            Methanogenium
            Methanospirillum

          Methanoplanaceae

            Methanoplanus

          Other Genera

            Methanocorpusculum
            Methanoculleus
            Methanohalobium
            Methanohalophilus
            Methanosarcina
            Methanosphaera

    Archaeal Sulfate Reducers

      Archaeoglobales

        Archaeoglobaceae

          Archaeoglobus

    Extremely Halophilic, Aerobic Archaeobacteria

      Halobacteriales

        Halobacteriaceae

          Haloarcula
          Halobacterium
          Halococcus
          Haloferax
          Natronobacterium
          Natronococcus

    Cell Wall-Less Archaeobacteria

          Thermoplasma

    Extremely Thermophilic and Hyperthermophilic So – Metabolizers

      Cocci, Optimum Growth Below pH4

            Desulfurolobus Metallosphaera

        Sulfolobales

          Sulfolobaceae

            Acidianus
            Sulfolobus

      Rods That Use H2 as Energy Source

            Pyrobaculum

        Thermoproteales

          Thermoproteaceae

            Thermofilum
            Thermoproteus

      Cocci or Disc-Shaped That Oxidize H2S

          Hyperthermus
          Staphylothermus
          Thermodiscus
          Desulfurococcaceae

            Desulfurococcus
            Pyrodictium

        Thermococcales

          Thermococcaceae

            Thermococcus
            Pyrococcus

Actinomycetes

    Nocardioform Actinomycetes

        Actinobispora
        Actinokineospora
        Actinopolyspora
        Amycolata
        Amycolatopsis
        Faenia (Micropolyspora)
        Gordona
        Intrasporangium
        Jonesia
        Kibdelosporangium
        Nocardia
        Nocardioides
        Oerskovia
        Promicromonospora
        Pseudoamycolata
        Pseudonocardia
        Rhodococcus
        Saccharomonospora
        Saccharopolyspora
        Terrabacter
        Tsukamurella

    Actinomycetes With Multilocar Sporangia

        Dermatophilus
        Frankia
        Geodermatophilus

    Actinoplanetes

        Actinoplanes
        Ampullariella
        Catelbatospora
        Dactylosporangium
        Micromonospora
        Pilimelia

    Streptomyces and Related Genera

        Intrasporangium
        Kineosporia
        Sporichthya
        Streptomyces
        Streptoverticillium

    Maduromycetes

        Actinomadura
        Microbispora
        Microtetraspora
        Planobispora
        Planomonospora
        Spirillospora
        Streptosporangium

    Thermomonospora and Related Genera

        Actinosynnema
        Nocardiopsis
        Streptoalloteichus
        Thermomonospora

    Thermoactinomycetes

        Thermoactinomyces

    Other Actinomycete Genera

        Glycomyces
        Kibdelosporangium
        Kitasatosporia
        Saccarothrix




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