Examples include spirillium, which are thick, durable spirals and spirochetes, which are slender and flexible. Spiral – These are simply spiral-shaped bacteria. For example, diplobacilli refer to two bacilli next to each other, while streptobacilli refers to chains of bacilli. For instance, diplococci refer to pairs of cocci, streptococci refer to chains and staphylococci refers to clusters of cocci.īacilli – These are rod-shaped bacteria and just like cocci they can be found on their own or grouped. They are named cocci due to their spherical shape, although they commonly appear in groups. There are a wide variety of different shapes, yet the three main types are cocci, bacilli, and spiral.Ĭocci – These are the most common type of bacteria. This mainly involves looking at their shape and size. Upon viewing the bacteria under the microscope, you will be able to identify the bacteria based on a wide variety of physical characteristics. Begin with a low magnification and gradually increase to observe greater detail.
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