Which type of bacteria forms in clusters and is associated with pus formation?

Staphylococci are a type of bacteria that typically form in clusters, resembling bunches of grapes when viewed under a microscope. This clustering characteristic is significant in identifying the bacteria. Staphylococci are known to be associated with various infections, including those that produce pus, because they can cause abscesses and other purulent infections. Conditions such as skin infections, pneumonia, and sepsis can arise from staphylococcal infections, indicating their pathogenic potential.

In contrast, streptococci, which form in chains or pairs, are linked to different types of infections and do not typically produce pus in the same way. Escherichia coli is a type of bacteria primarily found in the intestines and is not associated with cluster formation or pus. Bacillus refers to a genus of rod-shaped bacteria that can be found in various environments and does not exhibit the clustering characteristic typical of staphylococci. Therefore, identifying staphylococci is crucial for recognizing potential infections that may lead to pus formation.