Actinobacteria Aquificae Chlamydiae Bacteroidetes/Chlorobi Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Lentisphaerae Nitrospirae Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Verrucomicrobia
Bacteria (singular: bacterium) are unicellular microorganisms. They are typically a few micrometres long and have many shapes including curved rods, spheres, rods, and spirals. The study of bacteria is bacteriology, a branch of microbiology. Bacteria are ubiquitous in every habitat on Earth, growing in soil, acidic hot springs, radioactive waste,





Bacteria in the human body
Bioaerosol
Extremophiles
Transgenic bacteria
Biotechnology
Denitrification
Desulforudis audaxviator
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Madigan, Michael and Martinko, John. Brock Biology of Microorganisms. 11th ed. Prentice Hall, 2005. ISBN 0-13-144329-1
Holt, John. G. Bergey's Manual of Determinative Bacteriology. 9th ed. Baltimore, Maryland: Williams and Wilkins, 1994. ISBN 0-683-00603-7
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Tortora, Gerard; Funke, Berdell; Case, Christine. Microbiology: An Introduction. 8th ed. Benjamin Cummings, 2003. ISBN 0-8053-7614-3
Bacterial Nomenclature Up-To-Date from DSMZ
The largest bacteria
Tree of Life: Eubacteria
Videos of bacteria swimming and tumbling, use of optical tweezers and other videos.
Planet of the Bacteria by Stephen Jay Gould
On-line text book on bacteriology
Animated guide to bacterial cell structure.