So you get sick, go to er, get antibiotic iv.
Do they culture a urine sample & prescribe a specific antibiotic for that infection for a minimum of 14 days?
If not, then you're not getting rid of it.
You're just treating the same one long enough to feel better,
and the infection is getting stronger & stronger.
Do they retest you after taking the specific antibiotic for 14 days,
to make sure you're healed?