Urinary tract infections (UTIs) are not common in cats.Both sudden and chronic urinary tract infections are caused by bacterial infections. The bacteria involved in UTIs usually come from either the gastrointestinal tract or lower down the urinary/reproductive tract.
This said, urinary tract infection is a common cause of FLUTD in cats (especially females) older than 10 years of age. Cats in this age group are at risk of other health issues, like kidney disease and diabetes, which can cause changes to the urine that support infection.
Urinary Tract Infection (UTI). Cats get UTIs when there is a bacterial infection in their bladder or urethra. Your vet will need a urine sample to diagnose this condition. Uroliths (Urinary Stones).

A urinary tract infection (UTI) in a cat is always feline lower urinary tract disease (FLUTD), but FLUTD can also present as sterile cystitis, crystals, stones, etc.
A urinary tract infection in a cat typically happens when bacteria gets into any part of the urinary system and cause an infection. The urinary system includes the kidneys, both ureter tubes, the bladder, the urethra and the genitalia in both male and female cats.

Moving forward, it's essential to keep these visual contexts in mind when discussing Male Cat Urinary Tract Infection Age Related.
Urinary tract infections (commonly known as UTIs) are relatively rare in cats, but they can occur if bacteria manages to reach their bladder via the urethra. Most UTIs in cats can be treated with a simple course of antibiotics.
A urinary tract infection, or UTI, occurs in cats when disease-causing bacteria infiltrate and overcome the bodys immune defenses and then multiply within the urinary tract.

VCA Animal Hospitals Urinary Tract Infections (UTIs) in Cats.