Bacteria of different shapes, computer illustration showing three main shapes of bacteria - spherical (cocci), for example, Staphylococcus aureus; rod-like, for example, Mycobacterium tuberculosis; and spiral, for example, Campylobacter jejuni.

- Image ID: PA6G9X

Bacteria of different shapes, computer illustration showing three main shapes of bacteria - spherical (cocci), for example, Staphylococcus aureus; rod-like, for example, Mycobacterium tuberculosis; and spiral, for example, Campylobacter jejuni.

Science Photo Library / Alamy Stock Photo

Image ID: PA6G9X