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Urinary Tract Infections in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

If the condition worsens / symptoms persist, consult a veterinarian.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition

Urinary tract infections in cats are conditions caused by the invasion of bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. or other microorganisms into the urinary tract, which can lead to inflammation and discomfort during urination.

Can Occur with the Following Diseases:

Basics and possible causes

Urinary tract infections in cats are often the result of bacterial infections that occur when bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. ascend through the urethra into the bladder. These bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. often originate from the cat’s feces or environment. The urinary tract consists of the kidneys, ureters, bladder, and urethra, with the bladder being most commonly affected.

One of the most common causes of urinary tract infections in cats is the presence of struvite crystals or stones that form in the bladder. These crystals form due to an excessively high concentration of certain minerals in the urine and can irritate the mucous membrane of the urinary tract, which in turn promotes infections.

Another common reason for urinary tract infections is stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being.. StressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can negatively affect the cat’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. and lead to increased susceptibility to infections. Changes in the environment, such as moving or new pets, can triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. and increase the risk of urinary tract infections.

Certain breeds, such as Persian cats and British Shorthairs, are genetically more susceptible to urinary tract diseases. Age also plays a role, as older cats are more frequently affected by urinary tract infections. Overweight and insufficient water intake are additional risk factors.

Typical accompanying symptoms

Frequent urination: Cats with urinary tract infections urinate more often than normal because the inflammation of the bladder causes constant urinary urgency.
Painful urination: The cat may experience pain when urinating, which may be expressed by meowing or twitching during the toilet visit.
Blood in the urine: A visible sign of a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is the presence of blood in the urine, which often causes a reddish discoloration of the urine.
Uncleanliness: Cats who are normally house-trained may start urinating outside the litter box, which may indicate a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..
Altered drinking behavior: Increased thirst or decreased water intake can be accompanying symptoms of a urinary tract infection.
General malaise: Cats may appear lethargic, suffer from loss of appetite, or feel unwell, which indicates inflammation in the body.

When to see a vet?

Eskalation: ORANGE in case of fever, weight loss, , flank pain, vomiting, or deterioration of general condition.

It is important to see a veterinarian as quickly as possible if a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is suspected, as untreated infections can lead to serious complications such as kidney infections. If the cat shows pain during urination, blood is present in the urine, or it urinates very frequently and in small amounts, a veterinarian should be consulted immediately.

Another sign of the need for a veterinary visit is if the cat has difficulty urinating at all, which may indicate a serious urinary tract blockage. In such cases, there is an urgent need for action, as a blockage can be life-threatening.

If the cat appears apathetic, refuses to eat or drink, or shows persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. vomiting, these are also alarm signals that require an immediate veterinary visit.

Symptom recognition for the pet owner and veterinary diagnostic procedure

For pet owners, it is important to recognize the symptoms of a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. early. Careful observation of the cat’s behavior, especially during litter box use, can provide important clues. Abnormalities such as frequent visits to the litter box, increased licking in the genital area, or changes in urine should not be ignored.

At the veterinarian, diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is usually made through a combination of medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits., physical examination, and specific tests. A urine test helps determine the presence of bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., blood, or crystals in the urine. In some cases, X-rays or ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. examinations may also be necessary to identify stones or structural abnormalities.

A thorough examination by the veterinarian is crucial to determine the cause of the symptoms and initiate appropriate treatment. It may also be necessary to perform a urine culture to identify the specific pathogenA pathogen is a microorganism or virus that can cause disease in its host. Pathogens include bacteria, viruses, fungi, and parasites. and select the appropriate antibiotic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions..

What the pet owner can do and professional therapy options

As a pet owner, you can take several measures to relieve your cat’s discomfort and support healing. Make sure your cat always has access to fresh water to flush the urinary tract and reduce the concentration of minerals in the urine.

Switching to a special diet for cats with urinary tract diseases can also be helpful. These diets are designed to regulate the pH value of urine and prevent the formation of crystals. Your veterinarian can recommend the appropriate diet.

StressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. reduction is another important aspect. Provide a calm environment and avoid changes that could stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. your cat. Regular playtime and sufficient retreat options can help reduce stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being..

Avoid treating the symptoms yourself without consulting a veterinarian, as this can lead to worsening of the condition. It is important to consistently follow the prescribed treatment and administer all medications as directed.

If your cat’s condition does not improve or worsens despite the measures taken, do not hesitate to visit the veterinarian again to adjust the treatment or carry out further examinations.

Outlook on current research

Research on urinary tract infections in cats has made significant progress in recent years. Scientists are increasingly focusing on the role of bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. and other microorganisms in the development and worsening of these infections. Recent studies show that not only well-known bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease. such as Escherichia coli, but also less familiar bacterial species could play a role. These findings could lead to new treatment approaches that go beyond traditional antibiotics.

Another research focus is on the genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. of cats to urinary tract infections. Scientists are trying to determine whether certain breeds or genetic characteristics show a higher susceptibility to these conditions. InitialInitial means beginning or at the start. In medicine, it can refer to the first symptoms of a disease or the first phase of a treatment process. results suggest that there are genetic markers that correlate with an increased risk of urinary tract infections. This could lead to preventive measures based on genetic testing in the future.

The role of diet and lifestyle is also being intensively studied. There is evidence that certain food compositions can increase or decrease the risk of urinary tract infections. Researchers are investigating how dietary adjustments can help promote urinary tract health. In particular, the importance of water intake and the pH valueThe pH value is a measure of the acidity or alkalinity of an aqueous solution. It ranges from 0 to 14, with a pH value of 7 being considered neutral, values below 7 acidic, and values above 7 alkaline. of urine are in focus. InitialInitial means beginning or at the start. In medicine, it can refer to the first symptoms of a disease or the first phase of a treatment process. studies show that increased water intake and adjustment of urine pH valueThe pH value is a measure of the acidity or alkalinity of an aqueous solution. It ranges from 0 to 14, with a pH value of 7 being considered neutral, values below 7 acidic, and values above 7 alkaline. through diet could potentially have protective effects.

In behavioral research, scientists are investigating how stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. and environmental factors contribute to the development of urinary tract infections. It has been found that stressed cats are more susceptible to urinary problems due to changes in their environment or lack of stimulation. Researchers are developing strategies to improve the living conditions of cats and thus reduce stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., which in turn could decrease the risk of urinary tract infections.

Innovative diagnostic methods are also an important aspect of current research. The use of non-invasive techniques for early detection of urinary tract infections is being intensively researched. This includes new urine tests that measure specific biomarkers for infections. These tests could enable faster and more accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. in the future and thus improve treatment outcomes.

Overall, research shows that a holistic approach is required to effectively combat urinary tract infections in cats. Through the interaction of geneticsGenetics is the science of genes, heredity, and the variation of organisms. It studies how genetic information is passed from generation to generation and how it influences the development, appearance, and behavior of living things., diet, environment, and innovative diagnostic methods, better preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. and treatment strategies can be developed in the long term.

Frequently asked questions

What are the most common symptoms of a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. in cats? Common symptoms include frequent urination, pain when urinating, blood in the urine, uncleanliness, and excessive licking in the genital area.
How can I tell if my cat has a urinary tract infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.? Watch for behavioral changes such as frequent urination in small amounts, signs of pain or discomfort during urination, and changes in urine color. A visit to the veterinarian is necessary to make an accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients..
Can urinary tract infections in cats heal on their own? In some cases, mild infections may resolve on their own, but it is important to seek veterinary diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment, as untreated infections can lead to more serious health problems.
What causes urinary tract infections in cats? Urinary tract infections can be caused by bacteriaBacteria are microscopic, single-celled organisms that exist in almost every environment on Earth. Some types of bacteria are beneficial or even essential to life, while others can cause disease., viruses, fungi, or parasites. StressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., overweight, and insufficient water intake can also be risk factors.
How are urinary tract infections in cats treated? Treatment typically includes antibiotics to fight the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., pain medication to relieve discomfort, and possibly dietary adjustments to promote urinary health.
Can urinary tract infections in cats be prevented? Yes, urinary tract infections can be reduced through a balanced diet, adequate water intake, and minimizing stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being.. Regular veterinary check-ups are also important.
Is it possible for my cat to have recurrentRecurrent refers to a disease that repeatedly returns or worsens after a temporary remission or improvement. urinary tract infections despite treatment? Yes, some cats can be susceptible to recurrentRecurrent refers to a disease that repeatedly returns or worsens after a temporary remission or improvement. infections. In such cases, a long-term management strategy is required, which may include special diets or medications.
What role does nutrition play in preventing urinary tract infections? A balanced diet specifically developed for urinary tract health can reduce the risk of infections. Such diets promote the proper pH balance and increase water intake.
Can stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. in cats triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. urinary tract infections? Yes, stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can weaken the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. and lead to behavioral changes that increase the risk of urinary tract infections. A stress-free environment can help minimize the risk.
How important is water intake in preventing urinary tract infections? Adequate water intake is crucial, as it helps flush the urinary tract and prevent the formation of crystals or stones that can promote infections.