By 2050 it is predicted that bacterial infection will be mans biggest killer overtaking cancer, heart disease, stroke etc.I've been prescribed antibiotics a number of times. I've been surprised at how complex the decision has become. Different germs respond to different antibiotics, and if they stop responding, the doctor doesn't just throw darts at a dartboard. There are specific protocols. Sometimes they have to test you to see exactly which germ is making you sick.
So I think DIY antibiotic choice is very risky, and undoubtedly contributing to the mess we are in with drug-resistant bacteria.
All due to indiscriminate antibiotic use and the inevitable development of resistance.
Imagine all bacteria acting like MRSA. Your "simple" chest infection or UTI will kill you like in the pre antibiotic era.