Classification of bacteria helps scientists, medical microbiologists, and epidemiologists recognize different bacterial species and understand the effects of similar species. The following article will cover a scientific flowchart that will help you understand the different groups of bacteria clearly.
What drew me towards becoming a microbiologist was the world of unseen organisms. There are millions and millions of these microscopic organisms around and even within us. For a common man, there may not be much difference between a bacterium and a virus. Bacteria are unicellular microorganisms that come in different shapes. There are different kinds of bacteria, like beneficial bacteria as well as pathogenic bacteria. Beneficial bacteria help in fermentation of food and drink, making antibiotics, killing pests, and even digestion of food. Pathogenic bacteria, on the other hand, are the main reason for diseases. To be able to differentiate between the helpful and harmful bacteria, scientists have come up with a scientific classification of these organisms.
Classification of Bacteria of Medical Importance
The classification helps in identification of organisms according to groups. These groups contain organisms that share common characteristics and traits from other organisms in a different group. The classification of bacteria of medical importance has been carried out according to the ‘Gram reaction’ all these years. Gram reaction is a medical staining test named after Christian Gram who came up with the process in 1884. He found out that these organisms have the ability to retain the crystal violet iodine complex after treating them with organic solvents like alcohol and acetone.
Organisms that are Gram-positive retain the stain color and look purple or blue-black under bright field microbiology. Those that cannot retain the dye complex need to be stained with a counterstain like carbol fuchsin and are called Gram-negative bacteria. Along with the Gram reaction, scientists also use the shape of bacteria to classify them. There are different types of bacteria shapes, like cocci (round), bacilli (stick or rod-shaped), or spiral.
Scientific Classification of Bacteria Based on Bergy’s Manual
Bergy’s Manual of Systematic Bacteriology is like the Holy Testament for microbiologists. This manual is the guiding light to identify bacterial species and understanding their characteristics. The manual was first published by David Hendricks Bergy in 1923, and helped in the classification based on their structure and functional characteristics. The following table contains the classification of bacteria by shape and function according to the Bergy’s Manual.
| Kingdom Prokaryotae Division II -Bacteria | Medically Important Bacterial Group | Classification by Shape and Function |
| Part 1 | Phototrophic bacteria | These are aquatic bacteria that can produce carbohydrates from CO2 with the help of photosynthetic pigments |
| Part 2 | Gliding bacteria | These are rods that can move by gliding in a layer of slime; these may form complex fruiting bodies |
| Part 3 | Sheathed bacteria | These are rods that are surrounded by a sheath of iron or manganese oxides; some of these rods have flagella for movement. |
| Part 4 | Budding and/or appendages bacteria | This is diverse group of rods that can reproduce by forming buds or appendages |
| Part 5 | Spirochetes | These are slender, helically-coiled bacteria that move by rotation or flexion of the cell |
| Part 6 | Spiral and curved bacteria | These are helically curved rods that can move with a corkscrew-like motion |
| Part 7 | Gram-negative aerobic rods and cocci | These are rods and spheres that are aerobic Gram-negative bacteria |
| Part 8 | Gram-negative facultatively anaerobic rods | These are rods that are Gram-negative and can survive in the absence of oxygen |
| Part 9 | Gram-negative anaerobic rods | These are rods that are strictly anaerobic Gram-negative organisms |
| Part 10 | Gram-negative cocci and coccobacilli | These are spheres that are Gram-negative bacteria |
| Part 11 | Gram-negative anaerobic cocci | These are spheres that are strictly anaerobic Gram-negative organisms |
| Part 12 | Chemolithotrophic bacteria | These bacteria use nitrogen, sulfur, and iron compounds for their energy and structural components |
| Part 13 | Methane-producing bacteria | These are rods and spheres that obtain energy from carbohydrates forming methane as an end product |
| Part 14 | Gram-positive cocci | These are spheres facultative Gram-positive organisms |
| Part 15 | Endospore-forming rods and cocci | These are rods and spheres that can form endospores during their life cycles |
| Part 16 | Gram-positive as porogenous rods | These are rod-shaped bacteria that do not form spores and give Gram-positive porogenous rods |
| Part 17 | Actinomycetes and related organisms | This is a very large group of aerobic and anaerobic rods |
| Part 18 | The rickettsia | These are small rod-shaped bacteria that are transmitted by arthropods, and can multiply only within a host cell that also includes chlamydiae |
| Part 19 | The mycoplasmas | These are very small, multi-shaped bacteria that lack a true cell wall |
Classification of Bacteria Flowchart
The following is a flowchart that contains names of most of the bacterial species under the specific groups according to their Gram reaction.
Classification of Bacteria of Medical Importance that give Gram-positive Reaction
This classification was carried out in 1984 and places cocci, endospore-forming and non-sporing rods, mycobacteria, and non-filamentous actinomycetes in this group.
Classification of Bacteria of Medical Importance that give Gram-negative Reaction
This classification was carried out in 1986 and placed spirochetes, spiral and curved, aerobic bacteria and facultatively aerobic rods, obligate anaerobic bacteria, aerobic and anaerobic cocci, sulfate and sulfur-reducing, rickettsias, clamydias, and mycoplasmas in this group.
The Kingdome Prokaryotae is divided into four divisions: Gracilicutes, Firmicutes, Tenericutes, Mendosicutes (Archeabacteria).
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
Archaeobacteria
- The Methanogens
- Cell Walls With Pseudomurein
- Methanobacteriales
- Methanobacteriaceae
- Methanobacterium
- Methanobrevibacter
- Methanobacteriaceae
- Methanothermaceae
- Methanothermus
- Methanobacteriales
- Cell Walls With Pseudomurein
- Methanococcales
- Methanococcaceae
- Methanococcus
- Methanococcaceae
- Methanosarcinaceae
- Methanococcaceae
- Methanolacinia
- Methanococcoides
- Methanolobus
- Methanothrix
- Methanococcaceae
- Methanomicrobiales
- Methanomicrobiaceae
- Methanomicrobium
- Methanogenium
- Methanospirillum
- Methanoplanaceae
- Methanoplanus
- Other Genera
- Methanocorpusculum
- Methanoculleus
- Methanohalobium
- Methanohalophilus
- Methanosarcina
- Methanosphaera
- Methanomicrobiaceae
- Methanococcales
- Cell Walls With Pseudomurein
- Archaeal Sulfate Reducers
- Archaeoglobales
- Archaeoglobaceae
- Archaeoglobus
- Archaeoglobaceae
- Archaeoglobales
- Extremely Halophilic, Aerobic Archaeobacteria
- Halobacteriales
- Halobacteriaceae
- Haloarcula
- Halobacterium
- Halococcus
- Haloferax
- Natronobacterium
- Natronococcus
- Halobacteriaceae
- Halobacteriales
- 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
- Thermococcaceae
- Thermofilum
- Thermoproteus
- Thermococcaceae
- Cocci or Disc-Shaped That Oxidize H2S
- Hyperthermus
- Staphylothermus
- Thermodiscus
- Desulfurococcaceae
- Desulfurococcus
- Pyrodictium
- Thermococcales
- Thermococcaceae
- Thermococcus
- Pyrococcus
- Thermococcaceae
- Sulfolobaceae
- Cocci, Optimum Growth Below pH4
- Spirochetes
- Spirochaetales
- Spirochaetaceae
- Borrelia
- Cristispira
- Spirochaeta
- Treponema
- Leptospiraceae
- Leptospira
- Spirochaetaceae
- Other: Hindgut Spirochetes of Termites and Cryptocercus punctulatus (wood-eating cockroach)
- Spirochaetales
- 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
- Aerobic, Catalase-Positive Genera
- Endospore-Forming Gram-positive Rods and Cocci
Amphibacillus
Bacillus
Clostridium
Desulfotomaculum (also dissimilatory sulfate reducer)
Oscillospira
Sporolactobacillus
Sporosarcina
Sulfidobacillus
Syntrophospora - 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 - 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
- Spirosomaceae
- 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
- Pseudomonadaceae
- 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
- Xenorhabdus
- Chromobacterium
- Zymomonas
- Enterobacteriaceae
- 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
- Veillonellaceae
- Bacteroidaceae
- Rickettsias and Chlamydias
- Rickettsiales
- Rickettsiaceae
- Cowdria
- Coxiella
- Ehrlichia
- Neorickettsia
- Rickettsia
- Rickettsiella
- Rochalimaea
- Wolbachia
- Bartonellaceae
- Bartonella
- Grahamella
- Anaplasmataceae
- Aegyptianella
- Anaplasma
- Eperythrozoon
- Haemobartonella
- Rickettsiaceae
- Chlamydiales
- Chlamydiaceae
- Chlamydia
- Chlamydiaceae
- Rickettsiales
- Mycoplasmas
- Mycoplasmataceae
- Mycoplasma
- Ureaplasma
- Acholeplasmataceae
- Acholeplasma
- Spiroplasmataceae
- Spiroplasma
- Other Genera
- Anaeroplasma
- Asteroleplasma
- Thermoplasma
- Mycoplasmataceae
- 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
- 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
- Endosymbionts of Protozoa
- Mycobacteria
- Mycobacteriaceae
- Mycobacterium
- Mycobacteriaceae
- 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
- Chromatiaceae
- Purple Sulfur Bacteria: External Sulfur Granules
- Ectothiorhodospiraceae
- Ectothiorhodopsin
- Ectothiorhodospira
- Ectothiorhodospiraceae
- 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
- Purple Sulfur Bacteria: Internal Sulfur Granules
- 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
- Chroococcales
- Nostocales
- Nostocaceae
- Anabaena
- Aphanizomenon
- Cylindrospermum
- Nodularia
- Nostoc
- Scytonemataceae
- Scytonema
- Rivulariaceae
- Calothrix
- Nostocaceae
- Stigonematales
- Chlorogloeopsis
- Fischerella
- Geitleria
- Stigonema
- Prochlorales
- Prochloraceae
- Prochloron
- Prochlorothrix
- Prochloraceae
- Cyanobacteria
- 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
- Siderocapsaceae
- Budding and/or Appendaged Bacteria
(Appendaged Bacteria are indicatated by *)- Prosthecate Bacteria
- Ancalomicrobium
- Asticcacaulus*
- Caulobacter*
- Dichotomicrobium*
- Filomicrobium*
- Hirschia
- Hyphomicrobium*
- Hyphomonas*
- Labrys
- Pedomicrobium
- Prosthecobacter*
- Prosthecomicrobium
- Stella
- Verrucomicrobium*
- Planctomycetales
- Gemmata
- Pirelulla
- Non prosthecate Budding Bacteria
- Angulomicrobium
- Blastobacter
- Ensifer
- Gemmiger
- Isosphaera
- Planctomyces
- Prosthecate Bacteria
- Nitrifying Bacteria
- 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
- Cytophagaceae
- Lysobacterales
- Lysobacteriaceae
- Lysobacter
- Lysobacteriaceae
- Cytophagales
- Flattened, Filamentous Gliding Bacteria
- Simonsiellaceae
- Alysiella
- Simonsiella
- Simonsiellaceae
- Sulfur-Oxidizing Gliding Bacteria
- Beggiatoales
- Beggiatoaceae
- Achromatium
- Beggiatoa
- Thioploca
- Thiospirillopsis
- Thiothrix
- Beggiatoaceae
- Beggiatoales
- The Pelonemas
- Pelonemataceae
- Achroonema
- Desmanthus
- Pelonema
- Peloploca
- Other Genera
- Agitococcus
- Desulfonema
- Herpetosiphon
- Isosphaera
- Leucothrix
- Saprospira
- Toxothrix
- Vitreoscilla
- Pelonemataceae
- Gliding, Fruiting Bacteria
- Archangiaceae
- Archangium
- Cystobacteraceae
- Cystobacter
- Melittangium
- Stigmatella
- Myxococcales
- Myxococcaceae
- Myxococcus
- Polyangiaceae
- Chondromyces
- Nannocystis
- Polyangium
- Other Genera
- Angiococcus
- Corallococcus
- Haploangium
- Sorangium
- Myxococcaceae
- Archangiaceae
You will find there are many reference journals as well as books that will provide you with further information related to scientific classification of bacteria. Hope the above paragraphs have helped solved some of your queries and doubts related to bacterial classification.