Cats of any age can have problems with their lower urinary tracts. Some cats are prone to urinary tract infections (UTIs) that go away after taking antibiotics.Urinary Tract Infection (UTI). Cats get UTIs when there is a bacterial infection in their bladder or urethra.
Causes of Urinary Tract Infections 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. If your cat is older or has other medical conditions, they are more likely to develop bacterial urinary tract problems.
Urinary Tract Infections in Cats: Understanding, Diagnosing, and Treating Feline UTIs Urinary Tract Infections (UTIs) in cats are a subset of Feline Lower Urinary Tract Disease (FLUTD), a condition that affects the bladder and urethra. While UTIs are relatively uncommonaffecting only 13% of cats with urinary symptomsthey can be painful and potentially dangerous if left untreated. This ...

The Guidelines set out a diagnostic approach to affected cats before focusing on the most common causes of LUTS: feline idiopathic cystitis (FIC), urolithiasis, urinary tract infection and urethral obstruction. The aim is to provide practitioners with practical information on these problematic conditions.
Urinary tract infections only occur in 1-3 percent of all cases of cystitis in cats and are considered a rare condition. For unknown reasons, cats who are 10 years of age and older are much more likely to have a urinary tract infection than younger cats. No specific cat breeds are prone to UTIs.

This said, urinary tract infection is a common cause of FLUTD in cats older than 10 years of age, especially females. 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.
Practical relevance: Urinary tract infection (UTI) is an important cause of feline lower urinary tract disease (FLUTD), particularly in female cats older than 10 years of age.
Urinary Tract Infections (UTIs) in Cats | VCA Animal Hospitals.