> do not cause disease in healthy people, with the exception of Staphylococcus aureus I'm no biologist, but surely as with (most?) bacteria that depends on whe

> do not cause disease in healthy people, with the exception of Staphylococcus aureus I'm no biologist, but surely as with (most?) bacteria that depends on whether your immune system is regularly exposed to it or not, right? Cursory search tells me: > Staphylococcus aureus [...] is a usual member of the microbiota of the body, frequently found in the upper respiratory tract and on the skin. [...] Although S. aureus usually acts as a commensal of the human microbiota, it can also become an opportunistic pathogen, being a common cause of skin infections including abscesses --- https://en.wikipedia.org/wiki/Staphylococcus_aureus https://en.wikipedia.org/wiki/Staphylococcus_aureus > An opportunistic infection is an infection caused by pathogens [...] that take advantage of an opportunity not normally available. These opportunities can stem from a variety of sources, such as a weakened immune system --- https://en.wikipedia.org/wiki/Opportunistic_infection https://en.wikipedia.org/wiki/Opportunistic_infection Wonder how it's an exception.