How long does it take a urinary tract infection to reach the kidneys?

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.
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.

Related Questions

Could you tell me how long it takes your urinary tract infection to reach the kidneys?

Kidney infection. Kidney infection (pyelonephritis) generally causes fever, chills and very significant flank pain. One generally feels "sick". Bladder infection (cystitis) rarely causes systemic symptoms. Discomfort in the pelvic area and irritative voiding symptoms are typical. In general, a bladder infection should not ascend to the kidneys unless there is an anatomic abnormality with the ureters. (reflux). Read more...

Will my kidneys hurt when I have a urinary tract infection?

Sometimes. Your kidneys will not hurt with an uncomplicated urinary tract infection, which just effects the bladder. But if the infection backs up into the kidneys and infects the kidney, this is called pyelonephritis, which usually causes the kidneys to hurt. This is a more serious infection, and requires a longer course of antibiotics. Read more...

What to do if I have some pain in my kidneys and I also have a urinary tract infection. Is that what causing it?

Need evaluation.. If you have a uti, and now have developed kidney pain, then you might have a kidney infection +/- kidney stones. You need to be seen immediately because sometimes this requires hospitalization to treat. Read more...

I want to know what is the difference in symptoms of urinary tract infection and kidney stones?

Can be similar. Flank pain, blood in the urine, frequent urination and pain when urinating can all be cause by both of these problems. Typically, however, back, flank or groin pain predominates with kidney stones and pain during urination dominates in uti. Read more...

How do you know if you have a kidney infection or a urinary tract infection?

UTI. Kidney infections are more serious and cause fever, chills, flank pain and cloudy urine classically. Bladder infections usually cause urinary frequency and burning and at times there can be blood in the urine. Cultures are done to document infection and identify the offending organism. Read more...

What are the differences between a urinary tract infection and a kidney infection? What symptoms are different?

UTI. "uti" includes all types of infections in the urinary tract. Cystitis is specifically a term describing inflammation of the bladder. Most often cystitis, although quit irritating, does not cause systemic symptoms such as fever, body aches etc. Pyelonephritis (also a uti) on the other hand is an infection of the kidney causing significant systemic symptoms. Read more...