What are pus-forming bacteria that grow in clusters called?

The correct answer is Staphylococci, which refers to a group of pus-forming bacteria that charactersitically grow in clusters resembling bunches of grapes. This clustering is a key identifying trait of Staphylococci. They are known for being opportunistic pathogens that can cause a variety of infections ranging from mild to severe, including skin infections like boils, pneumonia, and even food poisoning.

In contrast, Streptococci, another type of bacteria, typically grow in chains rather than clusters and are known for different infections, such as strep throat. Diplococci are bacteria that appear in pairs and are associated with conditions like pneumonia. Bacilli refer to rod-shaped bacteria, which are also classified separately based on their shape and arrangement. Each of these alternatives has distinct morphological characteristics and pathogenic behaviors that set them apart from Staphylococci.