Heartworms are a serious problem for cats. While the worms themselves are not visible to the naked eye, they can cause severe damage to the cat’s heart and lungs. The good news is that there are many treatment options available for cats with heartworm disease. But how long can a cat live with heartworms?

The answer depends on a few different factors, including how long it took for your cat to be diagnosed with heartworms and how quickly you treat your cat for the infection.

It’s important to remember that there is no cure for heartworm disease. All treatments only manage symptoms and slow down the progression of the infection so that your pet has more time to live without suffering from complications related to heartworm disease.

How Long Can A Cat Live With Heartworms

If you’re wondering how long your cat can live with heartworms, you have come to the right place. Read on to learn about the signs, treatment options, and prevention. Heartworms are very serious – your cat could die within a few months if not treated promptly.


Heartworm infection in cats is a serious disease. If not treated, the larvae can invade the heart and lungs, causing devastating damage. A cat that becomes infected with heartworms may show no symptoms until the worms reach adulthood. The disease is also associated with a range of other symptoms, including increased inflammation of the heart and lungs, an increased respiratory rate, and decreased appetite. In severe cases, a cat may become blind or collapse.

If the disease is severe, cats may need to be hospitalized to receive antibiotics, supportive care, and therapy. If the worms are in the heart, surgery may be necessary to remove them. However, the best treatment for heartworm disease is prevention. A heartworm preventative, given monthly, can prevent new heartworm infections in your cat.

Fortunately, there are many options available for treating heartworm in your cat. A veterinarian can recommend the right medication for your feline. There are also heartworm preventatives, which can be given orally once per month. If your cat is showing symptoms, call a veterinarian immediately. Your veterinarian has examined them and will have the most up-to-date knowledge of your cat’s health history.

Although heartworm in cats is often difficult to detect, veterinarians can test your cat’s blood for heartworms with an antigen test. This test is most effective after your cat has been infected by an infected mosquito. However, the test is not 100% accurate. Your veterinarian may also do an ultrasound or x-ray to confirm the presence of heartworms.

In general, cats can live for up to three months after heartworm treatment. However, the American Heartworm Society reports that adult heartworms usually do not survive long in cats and are only present in one to three adult worms. Although cats do not have adult heartworms, they can still have a high number of baby worms, which can cause serious damage to your cat.

Cats are susceptible to heartworm disease if they spend a lot of time outdoors, but even indoor cats can be infected with heartworms. In fact, one in four cats diagnosed with heartworm disease lives indoors. According to the Companion Animal Parasite Council, heartworm disease has been reported in cats in all 50 states.


Cats can get heartworms, and they can have many of the same symptoms as dogs do. However, prevention is key and there are many ways to protect your cat from the disease. Heartworm-preventative medications are available for purchase from veterinarians and can be given orally or applied topically. Some of these medications also contain ingredients that can fight intestinal parasites.

While the incidence of heartworm infection in cats is much lower than in dogs, it can still occur. Even if your cat lives indoors, exposure to mosquitoes can result in infection. The best way to protect your cat from this disease is to prevent your cat from contracting mosquitoes. Fortunately, heartworm prevention products are available for kittens as young as six weeks of age. In addition, you should give heartworm prevention products to your pet year-round.

Although heartworm symptoms in cats are often subtle, they can become very dramatic if left untreated. Some cats show no symptoms at all, while others develop a cough, dark urine, and a swollen abdomen. In extreme cases, your cat may even die of heartworms before you notice anything. If you notice these symptoms in your pet, it is important to seek medical attention.

Heartworm disease in cats occurs when mosquitoes pierce a cat’s skin, picking up heartworm larvae from an infected dog. Once inside, the heartworm larvae thrive in the cat’s body for eight months. The larvae live in the cat’s muscles and subcutaneous tissues. When they reach the lungs, the cat experiences a severe inflammatory reaction that seeks to destroy the worms. This causes the cat to develop asthma-like symptoms, as well as labored breathing and vomiting.

Cats that spend lots of time outdoors or are often outdoors are more susceptible to developing heartworm disease than indoor cats. Cats that have a lot of contact with the environment should get regular diagnostic heartworm tests to make sure they are not infected. Cats with chronic heartworm disease can have several years of varying symptoms before they show any obvious signs. The signs of heartworm disease include vomiting, enlarged liver, and coughing.

A veterinarian can diagnose heartworm disease by performing blood tests and a chest X-ray. He may also look for specific worm proteins in the heart and pulmonary vessels, which indicate the presence of adult heartworms. The diagnosis is not as easy as it is for dogs, but veterinarians can usually tell if a cat has heartworm disease based on its symptoms. The treatment for adult heartworm disease is aimed at reducing the severity of damage to the cat’s heart and respiratory system. Treatments may include anti-inflammatory drugs and corticosteroids.


Diagnosis of heartworms in a cat is based on clinical signs and tests for antigens and antibodies. A positive blood test may not necessarily mean the animal has an active infection since antibodies are produced over time. Despite this, current guidelines recommend a combination of antigen and antibody testing, clinical signs, and chest x-rays for the diagnosis of HARD in cats. However, some cats may not have any clinical signs of the infection, and some may die suddenly without any symptoms.

Diagnosis of heartworms in a cat is a complex process, and no test is 100 percent reliable. A veterinarian will look at the cat’s medical history, physical exam findings, chest x-rays, and general blood work to confirm the diagnosis. Moreover, the vet will run specific blood tests to check for antibodies and antigens in adult heartworms. The vet may also perform an echocardiogram to detect adult heartworms or other problems. An echocardiogram is a noninvasive way of detecting adult worms in the heart, and it can detect enlarged pulmonary arteries or other heart-related defects.

If a cat exhibits any signs of heartworm disease, treatment may include hospitalization for a course of aggressive supportive treatment. This treatment includes medications to support the heart, IV fluids, and antibiotic therapy. In severe cases, surgical removal of the worms may be necessary. Cats should always be tested for heartworm disease annually to ensure that they are not susceptible to it again.

The symptoms of heartworms in cats are similar to those of heartworm in dogs but are often more severe. Cats have smaller hearts than dogs, and any damage caused by heartworms is serious. In severe cases, cats can die. A positive heartworm antibody test will be a sign that a cat has an active heartworm infection.

Heartworm infection is caused by the bite of a mosquito. The larvae enter the cat’s bloodstream and migrate over several months until they reach the lungs and the right side of the heart. About six months after the initial invasion, adult heartworms can begin to reproduce. After eight months, the adult heartworm will start to produce a fresh crop of microfilariae, which live in the blood for one month. Cats with heartworms often die suddenly.


Prevention of heartworms in cats is crucial for maintaining your feline friend’s health. Although cats do not carry the same heartworm burden as dogs, even one or two heartworms can be life-threatening. To ensure your feline friend is free from heartworm disease, you need to regularly check your cat’s stool for the presence of parasites.

Cats and dogs develop heartworms when mosquitoes bite them. These mosquitoes carry the microscopic larvae, called microfilaria, which grow to be adult heartworms. These larvae then pass into a new host through a mosquito bite wound. They can live for up to 5 to 7 years in dogs and two or three years in cats. While prevention is vital, a heartworm infestation is usually not fatal until your pet reaches adulthood.

Heartworm disease is an insidious disease that can cause a fatal response in otherwise healthy cats. Transmission seasons are unpredictable, so prevention is crucial for ensuring your feline companion’s health. Once your feline friend has been infected, there is no way to cure the disease. A vet’s visit will provide you with all the information you need to know about how to protect your pet from heartworm infection.

Cats that spend a lot of time outdoors are at a higher risk for heartworm disease. Even indoor cats are not immune. In fact, according to the Companion Animal Parasite Council, one out of four indoor cats is infected with heartworm. Prevention of heartworms is the most effective method to protect your cat from this deadly disease.

The first step in preventing heartworms in cats is to test your cat’s blood. An antibody test is a diagnostic tool that can detect heartworms but cannot determine if your cat is infected. A positive test will confirm the presence of adult heartworms in 10% to 20% of cats.

Despite its low prevalence, feline heartworm disease is still an extremely dangerous disease. The worm’s larvae are able to enter the lungs, which can result in heart failure in cats. Thankfully, the prevalence of this disease is significantly lower than canine heartworm disease. Indoor cats are especially susceptible to infection, as mosquitoes thrive outside and can enter the house. While there are currently no medications available for killing adult heartworms in cats, there are several preventative measures you can take to reduce the risk of infection.

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