Final answer:
Bacterial pyoderma is a skin infection associated with S. aureus that causes pus formation and can progress from folliculitis to more severe conditions like furuncles or carbuncles.
Step-by-step explanation:
Bacterial pyoderma is a purulent skin infection often associated with S. aureus and is found on the skin where there has been a breach such as a cut or wound. This infection can cause pus formation due to the production of leukocidins by certain strains of S. aureus, which kill white blood cells. The initial symptoms of pyoderma may start as folliculitis but can progress to more severe conditions such as furuncles or even deeper abscesses known as carbuncles.