Which form of pathogenic bacteria is characterized as short and rod-shaped?

The correct answer is bacilli, which refers to rod-shaped bacteria. Their long and cylindrical structure allows them to inhabit various environments and contribute to a range of pathogenic activities. Understanding the shape and classification of bacteria is crucial in fields such as microbiology and sanitation, as it impacts how infections are treated and controlled.

Cocci are spherical-shaped bacteria and do not provide the same geometric characteristics as bacilli. Spirilla are spiral-shaped, making them distinct from the rod-like structure of bacilli. Vibrio refers to comma-shaped bacteria, which also differ significantly from the typical rod shape. Each type of bacteria has unique implications for their behavior, treatment, and role in sanitation practices, highlighting the importance of accurate identification in controlling infections.