Dr. Gautam Banga
MBBS, MS - General Surgery, MCh - UrologyA urinary tract infection (UTI) is an infection that can affect any part of the urinary system, including the urethra, bladder, ureters, or kidneys. Most UTIs are caused by bacteria entering and multiplying in the urinary tract. The symptoms and treatment depend on which part of the urinary system is affected and whether the infection is localized or has spread.
The urinary system includes the kidneys, ureters, bladder, and urethra. A UTI develops when microorganisms, most commonly bacteria, enter the urinary tract and multiply.
UTIs can range from a relatively localized bladder infection to a more serious infection involving the kidneys or producing systemic symptoms.
A UTI can affect different parts of the urinary tract.
Urethritis refers to inflammation or infection involving the urethra, the tube through which urine leaves the body.
Symptoms may include burning during urination, irritation, or urinary discomfort.
Cystitis is inflammation of the bladder and is commonly caused by a bacterial infection.
Typical symptoms can include:
Cystitis is more common in women, but men can also develop it.
When infection involves the kidneys, it is called pyelonephritis.
Kidney infection can cause more significant symptoms such as:
A suspected kidney infection requires medical evaluation because it can become more serious than a localized bladder infection.
Most UTIs occur when bacteria enter the urinary tract and multiply. E. coli is one of the most common bacteria responsible for cystitis. It normally lives in the intestine but can enter the urinary tract and cause infection.
Other factors can increase the risk of developing a UTI, including:
Yes. Although bladder infections are more common in women, men can also develop UTIs.
In men, a UTI may sometimes be associated with an underlying urinary problem such as prostate enlargement, urinary obstruction, stones, or incomplete bladder emptying.
This is particularly important when infections repeatedly occur.
No. The location of the infection and the patient's individual risk factors matter.
A simple bladder infection can have mainly urinary symptoms, while an infection involving the kidneys or a patient with significant underlying urinary abnormalities may require a different evaluation and treatment approach.
The current EAU approach emphasizes distinguishing different types and severity of urinary infections when deciding on diagnosis and treatment.
Yes. An infection that initially involves the lower urinary tract can sometimes progress to the upper urinary tract and cause a kidney infection.
Symptoms such as fever, chills, flank or back pain, nausea, or vomiting are more concerning for an upper urinary tract infection and should not be ignored.
Not necessarily. Treatment depends on the type of urinary infection, the patient's symptoms, risk factors, and clinical evaluation.
For bacterial infections where antibiotics are appropriate, the choice should be based on the likely organism, local resistance patterns, previous culture results, and individual patient factors.
The 2026 EAU Guidelines specifically updated recommendations concerning antimicrobial treatment for cystitis.
Medical evaluation is particularly important if:
A recurrent UTI may sometimes be a sign of an underlying urinary condition that needs to be identified and treated.
At SCI International Hospital, New Delhi, Dr. Gautam Banga evaluates patients with urinary tract infections, particularly when symptoms are recurrent, persistent, associated with urinary obstruction, or accompanied by other urological problems.
The evaluation may focus on identifying the location and severity of the infection as well as possible contributing factors such as enlarged prostate, urinary stones, urethral stricture, incomplete bladder emptying, or other urinary tract abnormalities.
The goal is to treat the infection appropriately while also identifying any underlying condition that could contribute to repeated infections.
