What are the different types of staph bacteria?

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.

Staphylococcus aureus (S. aureus)

  • 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.