Micrococci are spherical bacteria that commonly inhabit the human skin and mucous membranes. These bacteria are also found in soil, water, and dairy products. There are several synonyms for the term Micrococci, which include staphylococci, streptococci, and cocci. Staphylococci are grape-like clusters of bacteria that are often found on the skin and in the nasal passages. Streptococci are chains of bacteria that cause infections such as strep throat and skin infections. Cocci refer to any bacteria that have a spherical shape. Micrococci are an important part of the normal human microbiome, but they can also cause infections if they enter the bloodstream or other parts of the body.