Herself - the SO - was working on bacteria resistance to antibiotics back in the mid-70s.  Even back then her group was sounding the alarm.  The ag industry countered with:

1.  It didn't exist
   
2.  If it does happen we'll invent new antibiotics

Sound familiar?  

The only broad-spectrum anti-biotic that can be used massively is Carbolic Acid.  Everything else in the  old shot locker needs to be reserved for some really nasty diseases we REALLY don't want developing resistance.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre