Staphylococcus aureus and its role in skin infections

Staphylococcus aureus is a bacterium that naturally resides on the skin and in the noses of most people. While often harmless, it can cause infections if it breaches the skin barrier through cuts, abrasions, eczema, or shaving.

Risk factors for infection include skin dryness, repetitive scratching, and friction from clothing or sports. Individuals with diabetes or weakened immune systems face a higher risk. Common infections caused by this bacterium include folliculitis, furuncles (boils), abscesses, and impetigo, which is highly contagious and common among young people.