Staphylococcus

Gram positive catalase positive oxidase negative cocci The Staph organisms are typically skin flora on organisms. This also means they will cover most surfaces on the planet. It's because of this nature that sterile plate technique is so important. Staph aureus has a slightly yellow coloration compared to other members of the genus. It is usually present in the nasal passages of animals.

Staphylococcus epidermidis is one of the most common organisms. It is able to be isolated from almost every surface. Staph organisms typically form small, regular colonies completely opaque to light.