Urinary Tract Infections in Older Adults: Atypical Signs

What a UTI is

The urinary tract includes the kidneys, ureters (tubes to the bladder), bladder and urethra. Infection most often affects the lower tract (bladder, called cystitis), and can climb to the kidneys (pyelonephritis) or enter the bloodstream (urosepsis). Most infections are caused by bowel bacteria, such as E. coli, which reach the urethra from the skin around the anus and genitals, especially in women with a short urethra and in anyone with poor hygiene routines, incontinence or catheters.

Typical symptoms (when they occur)

• Burning or pain on passing urine.
• Needing to pass urine very often, or urgently.
• Passing small amounts.
• Lower abdominal or pelvic discomfort.
• Cloudy, foul-smelling or dark urine, sometimes with blood.
• New or worse leakage.

Atypical signs in older adults

In older people, and especially those with dementia, frailty or catheters, signs may be non-specific:

• New or worsening confusion, drowsiness, agitation or hallucinations (delirium); see delirium in older adults.
• Sudden change in behaviour, such as being withdrawn, irritable or restless.
• Falls or increased unsteadiness.
• Loss of appetite, nausea or vomiting.
• New or worse incontinence, or wetting the bed.
• Fever or chills, though some have no fever or even a low temperature.
• Generalised weakness, feeling unwell, or "just not right".
• Back or flank pain (a sign of kidney involvement).
• Fast heart rate, fast breathing, low blood pressure.
• Worsening of other conditions, such as diabetes control.

Because these signs have many other causes, such as chest infections, dehydration, medicine effects, constipation, pain and stroke, a doctor must examine the person. See knowing when to call the doctor.

Why urine tests need careful interpretation

• Bacteria in the urine without infection (asymptomatic bacteriuria) are very common in older adults, particularly women, people in care homes and those with catheters. They usually do not need treatment, and treating them can lead to antibiotic side effects, resistant infections and diarrhoea (such as C. difficile). Guidance from bodies such as NICE advises against treating without symptoms.
• Dipstick tests (strips that detect white cells and nitrites) are unreliable in people over about 65, and in those with catheters, since they may be positive without infection or negative with infection. Doctors use them as one piece of information, along with symptoms and examination.
• Urine culture identifies bacteria and the antibiotics that work, and is more helpful in complex cases.
• A positive result in a confused person is not proof that the UTI is the cause; other causes need to be sought.
• A good sample matters: a clean midstream sample, collected carefully, with the genital area cleaned from front to back; ask the nurse how. Contaminated samples give false results.

For these reasons, do not rely on home urine strips to decide about antibiotics, and do not push for antibiotics based on cloudy or smelly urine alone. Cloudy or smelly urine can be caused by dehydration or food.

Who is at higher risk

• Women, especially after menopause, when tissue changes alter protection.
• Men with prostate enlargement, where the bladder does not empty fully; see prostate problems and urinary symptoms in older men.
• People with catheters; see catheter care basics for families.
• People with incontinence, wearing pads for long periods.
• Diabetes, especially with high sugar.
• Bladder not emptying, from nerve problems or constipation.
• Kidney stones or abnormalities.
• Dehydration and poor fluid intake.
• Immobility and bed rest.
• Dementia, stroke and Parkinson's disease.
• Weakened immunity, from illness or medicines.
• Recent hospital stay or previous UTIs.

Prevention at home

• Drink regularly through the day, unless the doctor has restricted fluids; see hydration for older adults. Pale-yellow urine is a rough sign of good hydration.
• Do not hold urine for long; go regularly; see bladder training and timed toileting.
• Empty the bladder fully, sitting upright, taking time.
• Treat constipation; see constipation in older adults.
• Clean from front to back, and gently; see wipes and perineal hygiene done gently.
• Change wet or soiled pads promptly, and keep skin dry; see pull-ups or briefs: choosing the right product.
• Wash hands before and after personal care.
• Control diabetes; see diabetes after 60: a home care guide.
• Treat menopause-related tissue dryness where the doctor advises, since local treatment may help some women.
• Look after catheters properly; see catheter care basics for families.
• Avoid unnecessary catheters.
• Avoid perfumed products, douches and harsh soaps near the genitals.
• Do not use antibiotics "to prevent" infections unless a doctor has prescribed a particular plan.
• Cranberry products: research findings are mixed, and benefits for older adults in care appear limited; they are not a substitute for good care. Ask the doctor before using supplements, particularly if on blood thinners.
• Do not rely on remedies such as herbal tonics, alkalinising powders or "bladder wash" at home. Procedures involving the bladder, such as a bladder wash, should be done only on a nurse's or doctor's instruction.

What to do if you suspect a UTI

1. Check the person: temperature (with a reliable thermometer; see digital thermometers: choosing and using them for older people), alertness, drinking, eating, urine colour and amount, pain, breathing and pulse. 2. Call the doctor the same day for any new confusion, fever, burning, flank pain, vomiting or marked change in behaviour or incontinence. Describe the signs in plain words, including when they started, and mention catheters, diabetes and previous infections. 3. Offer fluids gently, unless restricted. 4. Collect a clean sample if the doctor asks, using a sterile container from the pharmacy or lab, following the instructions. 5. Do not start leftover antibiotics, or give someone else's. Only take antibiotics prescribed for this episode, at the dose and for the full duration the doctor states, and do not stop early without advice. Tell the doctor about allergies and other medicines. If a medicine causes side effects such as rash, vomiting or severe diarrhoea, call the doctor. 6. Watch closely and keep a record of temperature, intake and symptoms. 7. Keep the person comfortable, with rest, and manage pain as the doctor advises. 8. Prevent falls if confused or weak; see falls risk assessment at home.

Red flags: seek emergency help (call 112 or go to hospital)

• High fever with shivering (rigors), or a very low temperature.
• New confusion, drowsiness, difficulty waking or extreme agitation.
• Flank or back pain with fever.
• Vomiting and unable to keep fluids or medicines down.
• Fast breathing, fast heart rate, dizziness or fainting, cold clammy or mottled skin, very low blood pressure (possible sepsis).
• Blood in the urine with clots, or severe pain.
• No urine passed for many hours, or inability to pass urine with a swollen, painful lower abdomen (retention).
• Catheter blocked, not draining, with pain or fever.
• Seizures.
• A person who is "just not right" and getting worse.

Sepsis can develop quickly in older adults; see fever in older adults: why it can be subtle and when to call.

Recurrent infections

If infections come back repeatedly, the doctor may look for underlying causes: incomplete emptying, stones, prostate problems, diabetes, prolapse, atrophic changes, catheter issues or hygiene routines. Options may include local vaginal oestrogen for postmenopausal women, treating constipation, changing products or routines, preventive plans under medical supervision, and specialist referral.

Dignity and emotions

UTIs often follow or aggravate incontinence, and families may feel guilty. They are not a sign of neglect. Approach care with calm, practical routines; see dignity in intimate care: words, privacy and consent.

When to ask a professional

Ask a doctor or nurse to assess any new confusion, fall, fever or urinary symptom, and to decide whether treatment is needed. Ask for advice about hydration, routines and prevention. Ask a pharmacist about antibiotic safety and interactions. See a doctor if infections recur. Call 112 for the red-flag signs above.