6 doctors weighed in:
How long does it take a urinary tract infection to reach the kidneys?
6 doctors weighed in

Dr. Tarek Naguib
Internal Medicine - Nephrology & Dialysis
3 doctors agree
In brief: Variable
It depends on the nature of the bacteria, the persons immunity, the persons anatomy of the bladder and the ureters, and the persence of absence of stones.
Of course, the trend of the symptoms of infection may predict if getting worse. Also, loin pain and fever will suggest kidney involvement.

In brief: Variable
It depends on the nature of the bacteria, the persons immunity, the persons anatomy of the bladder and the ureters, and the persence of absence of stones.
Of course, the trend of the symptoms of infection may predict if getting worse. Also, loin pain and fever will suggest kidney involvement.
Dr. Tarek Naguib
Dr. Tarek Naguib
Thank
Dr. George Klauber
Pediatrics - Urology
2 doctors agree
In brief: Instantly ->few days
Bacteria can reach the kidneys almost instantly if the subject has vesico-ureteral reflux (urine backs up from bladder), or can take hours to days depending upon the bacteria.
Some bacteria have tiny hair like projections (cilia) and can crawl through bladder vales and work their way up to the kidney. Sign of infection reaching the kidneys is when you develop back or flank pain.

In brief: Instantly ->few days
Bacteria can reach the kidneys almost instantly if the subject has vesico-ureteral reflux (urine backs up from bladder), or can take hours to days depending upon the bacteria.
Some bacteria have tiny hair like projections (cilia) and can crawl through bladder vales and work their way up to the kidney. Sign of infection reaching the kidneys is when you develop back or flank pain.
Dr. George Klauber
Dr. George Klauber
Thank
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