When a rod-shaped bacterium is short and plump it is called a: coccobacillus and if it is gently curved it is called a: vibrio.
Bacteria display a huge variety in shape, size, as well as arrangement of colonies. The three common shapes seen in bacteria are:-
- Coccus: It is used to describe bacterial cells that are spherical or round in shape. They can be perfect spheres or oval or bean-shaped.
- Bacillus: It is used to describe a bacterial cell which is cylindrical or rod-shaped. However, a rod which is short and plump is called a coccobacillus ,whereas it is termed as a vibrio if it is gently curved.
- Spirillum: It is used to refer to a bacterial cell possessing the shape of a spiral cylinder.
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