english: Basically, the massive use of antibiotics around the world has imposed such large selection pressure on bacteria that resistance is now a problem, because we've now selected for just the resistant bacteria.
non_english: Suštinski, velika upotreba antibiotika širom sveta je bakterijama nametnula  tako oštru selekciju da je danas problem otpornost, jer smo sada selektovali samo otporne bakterije.