Why are the bacteria that cause hospital-acquired infections resistant to many antibiotics, and why don't hospital acquired infections exist elsewhere ?
The infections that are caused in hospitals are usually a result of bacteria that are resistant to multiple antibiotics making them difficult to treat, but why are the bacteria resistant to all these antibiotics? I realize that a lot of antibiotics are used in hospitals but the question that comes to my head whenever I read this is "So?". To make my misconception clearer, I will use MRSA as an example . I mean , for the Staphylococcus aureus bacterium to become resistant , the antibiotic has to be used on it , so how can the antibiotics used to treat different infections in difference people act as a selection pressure for Staphylococcus aureus ( the Bacteria that causes MRSA )?