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<p>There are approximately ten times as many bacterial cells as human cells in the human body, with large numbers of bacteria on the skin and in the digestive tract.<sup class="reference" id="_ref-3">[5]</sup> Although the vast majority of these bacteria are rendered harmless or beneficial by the protective effects of the immune system, a few pathogenic bacteria cause infectious diseases, including cholera, syphilis, anthrax, leprosy and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people a year, mostly in sub-Saharan Africa.<sup class="reference" id="_ref-4">[6]</sup> In developed countries, antibiotics are used to treat bacterial infections and in various agricultural processes, so antibiotic resistance is becoming common. In industry, bacteria are important in processes such as wastewater treatment, the production of cheese and yoghurt, and the manufacture of antibiotics and other chemicals.<sup class="reference" id="_ref-5">[7]</sup></p>
<p>Bacteria are prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term <em>bacteria</em> traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotic life consists of two very different groups of organisms that evolved independently from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.<sup class="reference" id="_ref-6">[8]</sup></p>
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<h2><span class="mw-headline">History of bacteriology</span></h2>
<p>The existence of microorganisms was hypothesized during the late Middle Ages. In <em>The Canon of Medicine</em> (1020), Abū Alī ibn Sīnā (Avicenna) stated that bodily secretions are contaminated by "foul foreign earthly bodies" before a person becomes infected, but he did not view these bodies as primary causes of disease. When the Black Death bubonic plague reached al-Andalus in the 14th century, Ibn Khatima and Ibn al-Khatib wrote of infectious diseases being caused by "contagious entities" that enter the human body.<sup class="reference" id="_ref-7">[9]</sup><sup class="reference" id="_ref-8">[10]</sup> These early ideas about the contagious nature of some diseases were speculative in nature and not based around any science, however; they became more popular in Europe during the Renaissance, particularly through the writing of Girolamo Fracastoro.<sup class="reference" id="_ref-9">[11]</sup></p>
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<div class="thumbinner" style="WIDTH: 242px"><img class="thumbimage" height="275" alt="Antonie van Leeuwenhoek, the first person to observe bacteria using a microscope." width="240" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Antoni_van_Leeuwenhoek.png/240px-Antoni_van_Leeuwenhoek.png" width="240" border="0" />
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Antonie van Leeuwenhoek, the first person to observe bacteria using a microscope.</div>
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<h2><span class="mw-headline">Morphology</span></h2>
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<div class="thumbinner" style="WIDTH: 362px"><img class="thumbimage" height="333" alt="Bacteria display a large diversity of cell morphologies and arrangements." width="360" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Bacterial_morphology_diagram.svg/360px-Bacterial_morphology_diagram.svg.png" width="360" border="0" />
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Bacteria display a large diversity of cell morphologies and arrangements.</div>
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<p>Many bacterial species exist simply as single cells, others associate in characteristic patterns: <em>Neisseria</em> form diploids (pairs), <em>Streptococcus</em> form chains, and <em>Staphylococcus</em> group together in "bunch of grapes" clusters. Bacteria can also be elongated to form filaments, for example the Actinobacteria. Filamentous bacteria are often surrounded by a sheath that contains many individual cells; certain types, such as species of the genus <em>Nocardia</em>, even form complex, branched filaments, similar in appearance to fungal mycelia.<sup class="reference" id="_ref-35">[39]</sup></p>
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<div class="thumbinner" style="WIDTH: 312px"><img class="thumbimage" height="252" alt="The range of sizes shown by prokaryotes, relative to those of other organisms and biomolecules" width="310" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Relative_scale.svg/310px-Relative_scale.svg.png" width="310" border="0" />
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The range of sizes shown by prokaryotes, relative to those of other organisms and biomolecules</div>
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<dl><dd><em>Further information: Bacterial cell structure</em> </dd></dl>
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<div class="thumbinner" style="WIDTH: 322px"><img class="thumbimage" height="177" alt="Diagram of the cellular structure of a typical bacterial cell" width="320" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Prokaryote_cell_diagram.svg/320px-Prokaryote_cell_diagram.svg.png" width="320" border="0" />
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Diagram of the cellular structure of a typical bacterial cell</div>
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<p>In many bacteria an S-layer of rigidly arrayed protein molecules covers the outside of the cell.<sup class="reference" id="_ref-55">[63]</sup> This layer provides chemical and physical protection for the cell surface and can act as a macromolecular diffusion barrier. S-layers have diverse but mostly poorly understood functions, but are known to act as virulence factors in <em>Campylobacter</em> and contain surface enzymes in <em>Bacillus stearothermophilus</em>.<sup class="reference" id="_ref-56">[64]</sup></p>
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<div class="thumbinner" style="WIDTH: 252px"><img class="thumbimage" height="167" alt="Helicobacter pylori electron micrograph, showing multiple flagella on the cell surface" width="250" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/EMpylori.jpg/250px-EMpylori.jpg" width="250" border="0" />
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<em>Helicobacter pylori</em> electron micrograph, showing multiple flagella on the cell surface</div>
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<dl><dd><em>Further information: Endospores</em> </dd></dl>
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<div class="thumbinner" style="WIDTH: 252px"><img class="thumbimage" height="169" alt="Bacillus anthracis (stained purple) growing in cerebrospinal fluid" width="250" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/7/79/Gram_Stain_Anthrax.jpg/250px-Gram_Stain_Anthrax.jpg" width="250" border="0" />
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<em>Bacillus anthracis</em> (stained purple) growing in cerebrospinal fluid</div>
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<dl><dd><em>Further information: Microbial metabolism</em> </dd></dl>
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<div class="thumbinner" style="WIDTH: 187px"><img class="thumbimage" height="160" alt="Filaments of photosynthetic cyanobacteria" width="185" border="0" src="http://upload.wikimedia.org/wikipedia/en/f/fe/Bluegreen_algae.jpg" width="185" border="0" />
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Filaments of photosynthetic cyanobacteria</div>
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<p>Unlike multicellular organisms, increases in the size of bacteria (cell growth) and their reproduction by cell division are tightly linked in unicellular organisms. Bacteria grow to a fixed size and then reproduce through binary fission, a form of asexual reproduction.<sup class="reference" id="_ref-79">[87]</sup> Under optimal conditions, bacteria can grow and divide extremely rapidly, and bacterial populations can double as quickly as every 9.8 minutes.<sup class="reference" id="_ref-80">[88]</sup> In cell division, two identical clone daughter cells are produced. Some bacteria, while still reproducing asexually, form more complex reproductive structures that facilitate the dispersal of the newly formed daughter cells. Examples include fruiting body formation by <em>Myxobacteria</em> and arial hyphae formation by <em>Streptomyces</em>, or budding. Budding involves a cell forming a protrusion that breaks away and produces a daughter cell.</p>
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<div class="thumbinner" style="WIDTH: 302px"><img class="thumbimage" height="277" alt="A growing colony of Escherichia coli cells." width="300" border="0" src="http://upload.wikimedia.org/wikipedia/en/thumb/0/06/Growing_colony_of_E._coli.jpg/300px-Growing_colony_of_E._coli.jpg" width="300" border="0" />
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A growing colony of <em>Escherichia coli</em> cells.<sup class="reference" id="_ref-81">[89]</sup></div>
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<dl><dd><em>Further information: Chemotaxis, Flagella, Pilus</em> </dd></dl>
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<div class="thumbinner" style="WIDTH: 252px"><img class="thumbimage" height="294" alt="The different arrangements of bacterial flagella: A-Monotrichous; B-Lophotrichous; C-Amphitrichous; D-Peritrichous;" width="250" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Flagella.png/250px-Flagella.png" width="250" border="0" />
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The different arrangements of bacterial flagella: A-Monotrichous; B-Lophotrichous; C-Amphitrichous; D-Peritrichous;</div>
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<h2><span class="mw-headline">Classification and identification</span></h2>
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<div class="thumbinner" style="WIDTH: 202px"><img class="thumbimage" height="150" alt="Streptococcus mutans visualized with a Gram stain" width="200" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Streptococcus_mutans_Gram.jpg/200px-Streptococcus_mutans_Gram.jpg" width="200" border="0" />
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<em>Streptococcus mutans</em> visualized with a Gram stain</div>
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<p>Identification of bacteria in the laboratory is particularly relevant in medicine, where the correct treatment is determined by the bacterial species causing an infection. Consequently, the need to identify human pathogens was a major impetus for the development of techniques to identify bacteria.</p>
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<div class="thumbinner" style="WIDTH: 402px"><img class="thumbimage" height="264" alt="Phylogenetic tree showing the incredible diversity of bacteria, compared to other organisms. Eukaryotes are colored red, archaea green and bacteria blue." width="400" border="0" src="http://upload.wikimedia.org/wikipedia/en/thumb/7/78/Collapsed_tree_labels_simplified.png/400px-Collapsed_tree_labels_simplified.png" width="400" border="0" />
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Phylogenetic tree showing the incredible diversity of bacteria, compared to other organisms.<sup class="reference" id="_ref-107">[119]</sup> Eukaryotes are colored red, archaea green and bacteria blue.</div>
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<dl><dd><em>Further information: Bacteria and human health, Pathogen</em> </dd></dl>
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<div class="thumbinner" style="WIDTH: 252px"><img class="thumbimage" height="210" alt="Color-enhanced scanning electron micrograph showing Salmonella typhimurium (red) invading cultured human cells" width="250" border="0" src="http://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/SalmonellaNIAID.jpg/250px-SalmonellaNIAID.jpg" width="250" border="0" />
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Color-enhanced scanning electron micrograph showing <em>Salmonella typhimurium</em> (red) invading cultured human cells</div>
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<div class="references-small" style="-moz-column-count: 2; -webkit-column-count: 2; column-count: 2">
<ol class="references">
<li id="_note-0"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-0">^</a></strong> <cite style="FONT-STYLE: normal">Fredrickson J, Zachara J, Balkwill D, <em>et al</em> (2004). "<a class="external text" title="http://aem.asm.org/cgi/content/full/70/7/4230?view=long&pmid=15240306" rel="nofollow" href="http://aem.asm.org/cgi/content/full/70/7/4230?view=long&pmid=15240306" rel="nofollow">Geomicrobiology of high-level nuclear waste-contaminated vadose sediments at the Hanford site, Washington state</a>". <em>Appl Environ Microbiol</em> <strong>70</strong> (7): 4230–41. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/15240306" href="http://www.ncbi.nlm.nih.gov/pubmed/15240306">PMID 15240306</a>.</cite> </li> <li id="_note-1"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-1">^</a></strong> <cite style="FONT-STYLE: normal">Whitman W, Coleman D, Wiebe W (1998). "<a class="external text" title="http://www.pnas.org/cgi/content/full/95/12/6578" rel="nofollow" href="http://www.pnas.org/cgi/content/full/95/12/6578" rel="nofollow">Prokaryotes: the unseen majority</a>". <em>Proc Natl Acad Sci U S A</em> <strong>95</strong> (12): 6578–83. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/9618454" href="http://www.ncbi.nlm.nih.gov/pubmed/9618454">PMID 9618454</a>.</cite> </li> <li id="_note-2"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-2">^</a></strong> <cite style="FONT-STYLE: normal">Whitman W, Coleman D, Wiebe W (1998). "<a class="external text" title="http://www.pnas.org/cgi/content/full/95/12/6578" rel="nofollow" href="http://www.pnas.org/cgi/content/full/95/12/6578" rel="nofollow">>Prokaryotes: the unseen majority</a>". <em>Proc Natl Acad Sci U S A</em> <strong>95</strong> (12): 6578–83. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/9618454" href="http://www.ncbi.nlm.nih.gov/pubmed/9618454">PMID 9618454</a>.</cite> </li> <li id="_note-Rappe">^ <a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-Rappe_0"><sup><em><strong>a</strong></em></sup></a> <a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-Rappe_1"><sup><em><strong>b</strong></em></sup></a> <cite style="FONT-STYLE: normal">Rappé MS, Giovannoni SJ (2003). "The uncultured microbial majority". <em>Annu. Rev. Microbiol.</em> <strong>57</strong>: 369-94. <a title="Digital object identifier" href="http://en.wikipedia.org/wiki/Digital_object_identifier">doi</a>:<a class="external text" title="http://dx.doi.org/10.1146/annurev.micro.57.030502.090759" rel="nofollow" href="http://dx.doi.org/10.1146/annurev.micro.57.030502.090759" rel="nofollow">10.1146/annurev.micro.57.030502.090759</a>. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/14527284" href="http://www.ncbi.nlm.nih.gov/pubmed/14527284">PMID 14527284</a>.</cite> </li> <li id="_note-3"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-3">^</a></strong> <cite style="FONT-STYLE: normal">Sears CL (2005). "A dynamic partnership: celebrating our gut flora". <em>Anaerobe</em> <strong>11</strong> (5): 247-51. <a title="Digital object identifier" href="http://en.wikipedia.org/wiki/Digital_object_identifier">doi</a>:<a class="external text" title="http://dx.doi.org/10.1016/j.anaerobe.2005.05.001" rel="nofollow" href="http://dx.doi.org/10.1016/j.anaerobe.2005.05.001" rel="nofollow">10.1016/j.anaerobe.2005.05.001</a>. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/16701579" href="http://www.ncbi.nlm.nih.gov/pubmed/16701579">PMID 16701579</a>.</cite> </li> <li id="_note-4"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-4">^</a></strong> <a class="external text" title="http://www.who.int/healthinfo/bodgbd2002revised/en/index.html" rel="nofollow" href="http://www.who.int/healthinfo/bodgbd2002revised/en/index.html" rel="nofollow">2002 WHO mortality data</a>. Retrieved on <a title="2007" href="http://en.wikipedia.org/wiki/2007">2007</a>-<a title="January 20" href="http://en.wikipedia.org/wiki/January_20">01-20</a>. </li>
<li id="_note-5"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-5">^</a></strong> <cite style="FONT-STYLE: normal">Ishige T, Honda K, Shimizu S (2005). "Whole organism biocatalysis". <em>Curr Opin Chem Biol</em> <strong>9</strong> (2): 174–80. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/15811802" href="http://www.ncbi.nlm.nih.gov/pubmed/15811802">PMID 15811802</a>.</cite> </li>
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<li id="_note-126"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-126">^</a></strong> <cite style="FONT-STYLE: normal">Hagedorn S, Kaphammer B (1994). "Microbial biocatalysis in the generation of flavor and fragrance chemicals". <em>Annu. Rev. Microbiol.</em> <strong>48</strong>: 773-800. <a title="Digital object identifier" href="http://en.wikipedia.org/wiki/Digital_object_identifier">doi</a>:<a class="external text" title="http://dx.doi.org/10.1146/annurev.mi.48.100194.004013" rel="nofollow" href="http://dx.doi.org/10.1146/annurev.mi.48.100194.004013" rel="nofollow">10.1146/annurev.mi.48.100194.004013</a>. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/7826026" href="http://www.ncbi.nlm.nih.gov/pubmed/7826026">PMID 7826026</a>.</cite> </li>
<li id="_note-127"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-127">^</a></strong> <cite style="FONT-STYLE: normal">Cohen Y (2002). "Bioremediation of oil by marine microbial mats". <em>Int Microbiol</em> <strong>5</strong> (4): 189–93. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/12497184" href="http://www.ncbi.nlm.nih.gov/pubmed/12497184">PMID 12497184</a>.</cite> </li>
<li id="_note-128"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-128">^</a></strong> <cite style="FONT-STYLE: normal">Neves LC, Miyamura TT, Moraes DA, Penna TC, Converti A (2006). "Biofiltration methods for the removal of phenolic residues". <em>Appl. Biochem. Biotechnol.</em> <strong>129-132</strong>: 130-52. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/16915636" href="http://www.ncbi.nlm.nih.gov/pubmed/16915636">PMID 16915636</a>.</cite> </li>
<li id="_note-131"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-131">^</a></strong> <cite style="FONT-STYLE: normal">Bozsik A (2006). "Susceptibility of adult Coccinella septempunctata (Coleoptera: Coccinellidae) to insecticides with different modes of action". <em>Pest Manag Sci</em> <strong>62</strong> (7): 651–4. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/16649191" href="http://www.ncbi.nlm.nih.gov/pubmed/16649191">PMID 16649191</a>.</cite> </li>
<li id="_note-132"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-132">^</a></strong> <cite style="FONT-STYLE: normal">Chattopadhyay A, Bhatnagar N, Bhatnagar R (2004). "Bacterial insecticidal toxins". <em>Crit Rev Microbiol</em> <strong>30</strong> (1): 33–54. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/15116762" href="http://www.ncbi.nlm.nih.gov/pubmed/15116762">PMID 15116762</a>.</cite> </li>
<li id="_note-133"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-133">^</a></strong> <cite style="FONT-STYLE: normal">Serres M, Gopal S, Nahum L, Liang P, Gaasterland T, Riley M (2001). "<a class="external text" title="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=11574054" rel="nofollow" href="http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=11574054" rel="nofollow">A functional update of the Escherichia coli K-12 genome</a>". <em>Genome Biol</em> <strong>2</strong> (9): RESEARCH0035. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/11574054" href="http://www.ncbi.nlm.nih.gov/pubmed/11574054">PMID 11574054</a>.</cite> </li>
<li id="_note-134"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-134">^</a></strong> <cite style="FONT-STYLE: normal">Almaas E, Kovács B, Vicsek T, Oltvai Z, Barabási A (2004). "Global organization of metabolic fluxes in the bacterium Escherichia coli". <em>Nature</em> <strong>427</strong> (6977): 839–43. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/14985762" href="http://www.ncbi.nlm.nih.gov/pubmed/14985762">PMID 14985762</a>.</cite> </li>
<li id="_note-135"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-135">^</a></strong> <cite style="FONT-STYLE: normal">Reed JL, Vo TD, Schilling CH, Palsson BO (2003). "An expanded genome-scale model of Escherichia coli K-12 (iJR904 GSM/GPR)". <em>Genome Biol.</em> <strong>4</strong> (9): R54. <a title="Digital object identifier" href="http://en.wikipedia.org/wiki/Digital_object_identifier">doi</a>:<a class="external text" title="http://dx.doi.org/10.1186/gb-2003-4-9-r54" rel="nofollow" href="http://dx.doi.org/10.1186/gb-2003-4-9-r54" rel="nofollow">10.1186/gb-2003-4-9-r54</a>. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/12952533" href="http://www.ncbi.nlm.nih.gov/pubmed/12952533">PMID 12952533</a>.</cite> </li>
<li id="_note-136"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-136">^</a></strong> <cite style="FONT-STYLE: normal">Walsh G (2005). "Therapeutic insulins and their large-scale manufacture". <em>Appl Microbiol Biotechnol</em> <strong>67</strong> (2): 151–9. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/15580495" href="http://www.ncbi.nlm.nih.gov/pubmed/15580495">PMID 15580495</a>.</cite> </li>
<li id="_note-137"><strong><a title="" href="http://en.wikipedia.org/wiki/Bacteria#_ref-137">^</a></strong> <cite style="FONT-STYLE: normal">Graumann K, Premstaller A (2006). "Manufacturing of recombinant therapeutic proteins in microbial systems". <em>Biotechnol J</em> <strong>1</strong> (2): 164–86. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/16892246" href="http://www.ncbi.nlm.nih.gov/pubmed/16892246">PMID 16892246</a>.</cite> </li>
<li><cite class="book" style="FONT-STYLE: normal">Martinko JM, Madigan MT (2005). <em>Brock Biology of Microorganisms</em>, 11th ed., Englewood Cliffs, N.J: Prentice Hall. <a class="internal" href="http://en.wikipedia.org/w/index.php?title=Special:Booksources&isbn=0131443291">ISBN 0-13-144329-1</a>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Brock+Biology+of+Microorganisms&rft.au=Martinko+JM%2C+Madigan+MT&rft.edition=11th+ed.&rft.pub=Prentice+Hall&rft.place=Englewood+Cliffs%2C+N.J&rft.isbn=0-13-144329-1"> </span> </li>
<li><cite class="book" style="FONT-STYLE: normal">Holt JC, Bergey DH (1994). <em>Bergey's manual of determinative bacteriology</em>, 9th ed., Baltimore: Williams & Wilkins. <a class="internal" href="http://en.wikipedia.org/w/index.php?title=Special:Booksources&isbn=0683006037">ISBN 0-683-00603-7</a>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Bergey%27s+manual+of+determinative+bacteriology&rft.au=Holt+JC%2C+Bergey+DH&rft.edition=9th+ed.&rft.pub=Williams+%26+Wilkins&rft.place=Baltimore&rft.isbn=0-683-00603-7"> </span> </li>
<li><cite style="FONT-STYLE: normal">Hugenholtz P, Goebel BM, Pace NR (1998). "<a class="external text" title="http://jb.asm.org/cgi/content/full/180/18/4765?view=full&pmid=9733676" rel="nofollow" href="http://jb.asm.org/cgi/content/full/180/18/4765?view=full&pmid=9733676" rel="nofollow">Impact of culture-independent studies on the emerging phylogenetic view of bacterial diversity</a>". <em>J Bacteriol</em> <strong>180</strong> (18): 4765–74. <a class="external" title="http://www.ncbi.nlm.nih.gov/pubmed/9733676" href="http://www.ncbi.nlm.nih.gov/pubmed/9733676">PMID 9733676</a>.</cite> </li>
<li><cite class="book" style="FONT-STYLE: normal">Funke BR, Tortora GJ, Case CL (2004). <em>Microbiology: an introduction</em>, 8th ed,, San Francisco: Benjamin Cummings. <a class="internal" href="http://en.wikipedia.org/w/index.php?title=Special:Booksources&isbn=0805376143">ISBN 0-8053-7614-3</a>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Microbiology%3A+an+introduction&rft.au=Funke+BR%2C+Tortora+GJ%2C+Case+CL&rft.edition=8th+ed%2C&rft.pub=Benjamin+Cummings&rft.place=San+Francisco&rft.isbn=0-8053-7614-3"> </span> </li>
</ul>
<p><a id="External_links" name="External_links"></a></p>
<h2><span class="mw-headline">External links</span></h2>
<p><a class="external text" title="http://www.dsmz.de/bactnom/bactname.htm" rel="nofollow" href="http://www.dsmz.de/bactnom/bactname.htm" rel="nofollow">Bacterial Nomenclature Up-To-Date from DSMZ</a> </p>
<ul>
<li><a class="external text" title="http://www.sciencenews.org/pages/sn_arc99/4_17_99/fob5.htm" rel="nofollow" href="http://www.sciencenews.org/pages/sn_arc99/4_17_99/fob5.htm" rel="nofollow">The largest bacteria</a> </li> <li><a class="external text" title="http://tolweb.org/tree?group=Eubacteria&contgroup=Life_on_Earth" rel="nofollow" href="http://tolweb.org/tree?group=Eubacteria&contgroup=Life_on_Earth" rel="nofollow">Tree of Life: Eubacteria</a> </li> <li><a class="external text" title="http://www.rowland.harvard.edu/labs/bacteria/index_movies.html" rel="nofollow" href="http://www.rowland.harvard.edu/labs/bacteria/index_movies.html" rel="nofollow">Videos</a> of bacteria swimming and tumbling, use of optical tweezers and other videos. </li> <li><a class="external text" title="http://www.stephenjaygould.org/library/gould_bacteria.html" rel="nofollow" href="http://www.stephenjaygould.org/library/gould_bacteria.html" rel="nofollow">Planet of the Bacteria</a> by <a title="Stephen Jay Gould" href="http://en.wikipedia.org/wiki/Stephen_Jay_Gould">Stephen Jay Gould</a> </li> <li><a class="external text" title="http://www.textbookofbacteriology.net/" rel="nofollow" href="http://www.textbookofbacteriology.net/" rel="nofollow">On-line text book on bacteriology</a> </li> <li><a class="external text" title="http://www.blackwellpublishing.com/trun/artwork/Animations/Overview/overview.html" rel="nofollow" href="http://www.blackwellpublishing.com/trun/artwork/Animations/Overview/overview.html" rel="nofollow">Animated guide to bacterial cell structure.</a> </li>
</ul>
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