What is a feature of Staphylococci bacteria?

Staphylococci bacteria are characterized by their growth pattern, which indeed resembles a cluster, similar to grapes. This clustering trait is a defining feature of Staphylococcus species. In addition, staphylococci are known for their potential to cause various infections, including abscesses, which are localized collections of pus that can occur in the body due to their pathogenic nature. This aligns with the understanding that while some bacteria can be beneficial, staphylococci are often associated with infections due to their ability to produce toxins and evade the immune system.

The other options describe traits that are not accurate for Staphylococci. For example, while some bacteria might be harmless, the clustering nature and association with conditions like abscesses clearly highlight the pathogenic aspects of Staphylococci. Similarly, the reference to chains and being beneficial pertains more accurately to other bacterial groups, like Streptococci, while the mention of being elongated and non-pus forming does not accurately represent Staphylococci characteristics. Hence, focusing on the cluster growth and their capability to cause abscesses is crucial to understanding their role in microbiology.