Can Spirillum Be Singular?

Spirilla (singular, Spirillum) are a group of bacteria characterized by a corkscrew (spiral) appearance. They are Gram-negative bacteria and are characterized by motile structures known as flagella.

Is Spirillum singular or plural?

A spirillum (plural spirilla) is a rigid spiral bacterium that is Gram-negative and frequently has external amphitrichous or lophotrichous flagella.

Is Spirillum unicellular or multicellular?

These single-celled animals are microscopic in size.