What type of bacteria are streptococci?

Streptococci are classified as spherical bacteria that typically appear in chains or pairs, resembling a string of beads when viewed under a microscope. This distinctive arrangement is due to their method of cell division; they divide in one plane and remain attached, resulting in their characteristic chain-like formation. Streptococci can be important in medical contexts, as some species are known to be pus-forming and can lead to various infections. Understanding the arrangement and shape of bacterial cells is crucial in microbiology and helps in identifying pathogens responsible for different infections.

The other types listed represent different bacterial formations or characteristics that do not pertain to streptococci. For example, bacteria that are arranged in clusters are typically staphylococci, while rod-shaped bacteria can refer to bacilli, and spiral-shaped bacteria include spirilla. Recognizing these distinctions is important for proper bacterial classification and treatment.