What type of bacteria is characterized by forming clusters similar to a bunch of grapes?

The correct answer, which identifies bacteria that form clusters resembling a bunch of grapes, is Staphylococci. This type of bacteria is distinguished by their unique arrangement, where they cluster together in groups that can appear similar to clusters of grapes. This characteristic is a defining feature of Staphylococci, which are spherical and typically arranged in irregular clusters.

Staphylococci are also known to include species that can be pathogenic, such as Staphylococcus aureus, which is responsible for various infections. Understanding the arrangement of different bacteria is crucial in microbiology, as it aids in identification and understanding their behavior in clinical settings.

The other choices represent different bacterial forms or microorganisms that do not have this clustered characteristic. Streptococci, for example, are known for forming chains rather than clusters. Bacilli are rod-shaped bacteria and do not cluster in a grape-like formation, while viruses are fundamentally different from bacteria, being much smaller and requiring a host to replicate. This understanding is essential for anyone studying microbiology or working in fields related to health and safety, including lash specialty practices.