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			== Bacterial cellular morphologies gallery ==
			<gallery>
			File:Bacterial morphology diagram.svg\|Bacterial morphology diagram
			File:Arrangement of cocci bacteria en.svg\|Arrangement of cocci bacteria
			File:Staphylococcus aureus Gram.jpg\|Staphylococcus aureus Gram stain
			File:Cocci arrangement.png\|Cocci arrangement
			File:Coxiella burnetii 01.JPG\|Coxiella burnetii
			File:ARS Campylobacter jejuni.jpg\|Campylobacter jejuni
			File:Treponema pallidum.jpg\|Treponema pallidum
			</gallery>

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'''Bacterial Cellular Morphologies'''

[[Bacterial cellular morphologies]] refer to the various shapes and structural forms of [[bacteria]]. Bacteria are single-celled [[microorganisms]] that come in a variety of shapes and sizes. The three most common shapes are [[coccus]] (spherical), [[bacillus]] (rod-shaped), and [[spirillum]] (spiral).

==Coccus==

[[Coccus]] bacteria are spherical in shape. They can exist as single cells or can group together in pairs ([[diplococci]]), chains ([[streptococci]]), or clusters ([[staphylococci]]). Examples of coccus bacteria include ''[[Staphylococcus aureus]]'' and ''[[Streptococcus pneumoniae]]''.

==Bacillus==

[[Bacillus]] bacteria are rod-shaped. They can exist as single cells, in pairs ([[diplobacilli]]), or in chains ([[streptobacilli]]). Examples of bacillus bacteria include ''[[Escherichia coli]]'' and ''[[Bacillus anthracis]]''.

==Spirillum==

[[Spirillum]] bacteria are spiral-shaped. They are usually found in stagnant water and in the human body. Examples of spirillum bacteria include ''[[Spirillum minus]]'' and ''[[Campylobacter jejuni]]''.

==Other Morphologies==

In addition to the three most common shapes, bacteria can also take on other morphologies. For example, [[vibrio]] bacteria are comma-shaped, [[spirochete]] bacteria are long and tightly coiled, and [[pleomorphic]] bacteria can change their shape in response to their environment.

==Importance of Bacterial Morphology==

The shape of a bacterium can influence its [[pathogenicity]], its ability to survive in different environments, and its mode of movement. For example, spiral-shaped bacteria can move more easily through viscous environments, such as mucus, than rod-shaped or spherical bacteria.

==See Also==

* [[Microbiology]]
* [[Bacteriology]]
* [[Cell biology]]

==References==

<references />

[[Category:Bacteriology]]
[[Category:Microbiology]]
[[Category:Cell biology]]

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Bacterial cellular morphologies - Revision history

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