DESCRIPTION OF THE MAJOR CATEGORIES & GROUPS OF BACTERIA
I. Gram-negative eubacteria that have cell walls
Group 1: The spirochetes Treponema
Borrelia
Leptospira
Group 2: Aerobic/microaerophilic, motile helical/vibroid gramnegative
bacteria
Campylobacter
Helicobacter
Spirillum
Group 3: Nonmotile (or rarely motile) curved bacteria None
Group 4: Gram-negative aerobic/microaerophilic rods and cocci Alcaligenes
Bordetella
Brucella
Francisella
Legionella
Moraxella
Neisseria
Pseudomonas
Rochalimaea
Bacteroides (some species)
Group 5: Facultatively anaerobic gram-negative rods Escherichia (and related coliform
bacteria)
Klebsiella
Proteus
Providencia
Salmonella
Shigella
Yersinia
Vibrio
Haemophilus
Pasteurella
Group 6: Gram-negative, anaerobic, straight, curved, and helical
rods
Bacteroides
Fusobacterium
Prevotella
Group 7: Dissimilatory sulfate- or sulfur-reducing bacteria None
Group 8: Anaerobic gram-negative cocci None
Group 9: The rickettsiae and chlamydiae Rickettsia
Coxiella
Chlamydia
Carlos S. - Bacterias Table
Group 10: Anoxygenic phototrophic bacteria None
Group 11: Oxygenic phototrophic bacteria None
Group 12: Aerobic chemolithotrophic bacteria and assorted
organisms
None
Group 13: Budding or appendaged bacteria None
Group 14: Sheathed bacteria None
Group 15: Nonphotosynthetic, nonfruiting gliding bacteria Capnocytophaga
Group 16: Fruiting gliding bacteria: the myxobacteria None
II. Gram-positive bacteria that have cell walls
Group 17: Gram-positive cocci Enterococcus
Peptostreptococcus
Staphylococcus
Streptococcus
Group 18: Endospore-forming gram-positive rods and cocci Bacillus
Clostridium
Group 19: Regular, nonsporing gram-positive rods Erysepelothrix
Listeria
Group 20: Irregular, nonsporing gram-positive rods Actinomyces
Corynebacterium
Mobiluncus
Group 21: The mycobacteria Mycobacterium
Groups 22–29: Actinomycetes Nocardia
Streptomyces
Rhodococcus
III. Cell wall-less eubacteria: The mycoplasmas or mollicutes
Group 30: Mycoplasmas Mycoplasma
Ureaplasma
IV. Archaebacteria
Group 31: The methanogens None
Group 32: Archaeal sulfate reducers None
Group 33: Extremely halophilic archaebacteria None
Group 34: Cell wall-less archaebacteria None
Group 35: Extremely thermophilic and hyperthermophilic sulfur
metabolizers
None
Carlos S. - Bacterias Table