From harmless skin bacteria to dreaded pathogens
The bacterium Staphylococcus epidermidisis primarily a harmless microbe found on the skin and in the noses of humans. Yet some strains of this species can cause infections – in catheters, artificial joints, heart valves, and in the bloodstream – which are difficult to treat. These bacteria are often resistant to a particularly effective antibiotic, methicillin, and are among the most feared germs in hospitals.
https://www.gesundheitsindustrie-bw.de/en/article/press-release/harmless-skin-bacteria-dreaded-pathogens