Common Types of Staphylococcal Bacteria

Staphylococcus epidermidis (S. epidermidis)

S. epidermidis is the most common species of bacteria found on the skin and mucous membranes (protective membranes that line inner tissues and secrete mucus).
Although S. epidermidis is usually harmless, individuals with a weakened immune system are at risk for developing an infection.
It is the recognized pathogen that is responsible for the majority of infections involving intravenous (IV) lines, indwelling catheters, and prosthesis.

It is estimated that approximately 10-30% of the general population are carriers of S. aureus. About 48% of people with eczema are carriers.
The nostrils are considered to be the primary colonization site by S. aureus.
S. aureus and Streptococcus pyogenes are the most common pathogens causing superficial skin infections.
S. aureus can survive on dry surfaces and has the potential to cause a wide variety of infections in humans, either by direct invasion or through toxin production.