Which type of bacteria is characterized as round?

Cocci are a type of bacteria that are characterized by their round shape. This spherical form can exist as single cells, in pairs (diplococci), chains (streptococci), or clusters (staphylococci). The classification of bacteria by their shape is fundamental to microbiology and helps in identifying and categorizing different types of bacteria based on their morphology.

In contrast, bacilli refer to rod-shaped bacteria, vibrio are comma-shaped, and spirochetes are known for their spiral shape. Understanding these shapes is essential for microbiologists when identifying bacterial species and determining their potential effects on health and sanitation practices.