The Importance of Heartworm Prevention

When it comes to our beloved pets, their health and happiness are our top priorities. Heartworm disease is a serious threat that can affect both dogs and cats, and it’s crucial for pet owners to understand the importance of prevention. Imagine your furry friend, full of energy and joy, suddenly becoming lethargic and unwell due to a silent but deadly parasite. Heartworms can grow up to a foot long and live in the heart and lungs of infected animals, causing severe health issues and even death. That's why heartworm prevention isn’t just a recommendation; it’s a necessity.

Heartworm disease is not just a seasonal concern; it can affect pets year-round, depending on where you live. The lifecycle of the heartworm begins when a mosquito bites an infected animal and picks up the larvae. These larvae then develop and are transmitted to another animal through the mosquito bite. Once inside, they mature into adult worms, wreaking havoc on the heart and lungs. The best way to combat this insidious disease is through effective preventive measures that keep our pets safe.

In this article, we will explore the risks associated with heartworm disease, the symptoms to watch for, and the available treatment options should an infection occur. But most importantly, we will focus on the preventive measures that every pet owner should implement to protect their furry companions. Think of prevention as a shield that guards your pet against the dangers of heartworm disease. Why wait until it’s too late? Let’s dive into the details and ensure our pets live long, healthy lives free from the threat of heartworms.

Heartworm disease is a serious and potentially fatal condition caused by parasitic worms. This section explains how heartworms infect pets and the lifecycle of the parasite.

Recognizing the symptoms of heartworm infection is crucial for early diagnosis. This section outlines common signs to look for in dogs and cats that may indicate an infection.

Accurate diagnosis of heartworm disease involves specific testing methods. Here, we discuss the various diagnostic tests veterinarians use to confirm an infection in pets.

Blood tests are essential for diagnosing heartworm disease. This subsection explains how these tests work and what veterinarians look for in the results.

Imaging techniques like X-rays and ultrasounds can provide additional information about heartworm disease. This section describes how these tools help assess the severity of the infection.

If a pet is diagnosed with heartworm disease, treatment is necessary. This section covers the available treatment options, including medications and procedures to eliminate the parasites.

Prevention is key to avoiding heartworm disease. This section discusses effective preventive measures pet owners can take to protect their animals from infection.

Various preventive medications are available for pets. Here, we highlight the different types of heartworm preventatives and how they work to keep pets safe.

Routine veterinary visits play a vital role in heartworm prevention. This subsection emphasizes the importance of regular check-ups and testing for early detection and prevention.

As pet owners, it’s natural to have questions about heartworm prevention. Here are some common queries:

• How often should I give my pet heartworm prevention? - Most veterinarians recommend monthly heartworm preventatives year-round.
• Can indoor pets get heartworms? - Yes, even indoor pets are at risk, as mosquitoes can enter homes.
• What should I do if I miss a dose of heartworm prevention? - Contact your veterinarian for guidance on catching up.
• Are there side effects to heartworm medications? - While generally safe, some pets may experience mild side effects. Always consult your vet.

Understanding Heartworm Disease

Heartworm disease is not just a buzzword among pet owners; it’s a serious threat that can lead to severe health issues and even death in our beloved furry friends. This disease is caused by a parasitic worm known as Dirofilaria immitis, which primarily affects dogs but can also infect cats and other mammals. The lifecycle of these parasites is fascinating yet alarming, making it crucial for pet owners to understand how heartworms invade their pets.

The journey of a heartworm begins when a mosquito bites an infected animal, picking up the microscopic larvae, or microfilariae, present in the bloodstream. Once the mosquito bites another pet, it injects these larvae into the new host. Within a few months, these larvae mature into adult heartworms, which can live in the heart and lungs of the infected animal for several years. To put it simply, it’s like inviting a silent guest into your home who slowly takes over your space!

Here’s a simplified breakdown of the heartworm lifecycle:

• Stage 1: Mosquito bites an infected animal, acquiring microfilariae.
• Stage 2: Microfilariae develop into larvae within the mosquito.
• Stage 3: Mosquito bites a new host, injecting larvae.
• Stage 4: Larvae mature into adult heartworms in the new host.
• Stage 5: Adult heartworms reproduce, continuing the cycle.

Once inside the host, these adult heartworms can grow up to a foot long and can live for 5 to 7 years, wreaking havoc on the pet's health. They primarily reside in the heart and pulmonary arteries, causing inflammation and damage to the cardiovascular system. It’s like having a ticking time bomb in your pet’s heart!

As the infection progresses, the heartworms can lead to serious complications, including heart failure, lung disease, and even death if left untreated. This makes it essential for pet owners to be proactive about prevention. Understanding how heartworms operate and the risks they pose is key to keeping your pet safe. Remember, prevention is always better than cure!

To further illustrate the severity of heartworm disease, let’s take a look at some important statistics:

In conclusion, understanding heartworm disease is crucial for any pet owner. By being aware of how heartworms infect animals and the lifecycle of these parasites, you can take the necessary steps to protect your furry companions. Remember, knowledge is power, and when it comes to heartworm disease, being informed can save lives!

Symptoms of Heartworm Infection

Recognizing the symptoms of heartworm infection in your beloved pets is crucial for early diagnosis and effective treatment. Heartworm disease can be deceptive; in its early stages, pets may not show any signs at all, which is why it’s often referred to as the "silent killer." However, as the disease progresses, various symptoms can manifest, signaling that something is wrong. Understanding these signs can be the difference between a quick recovery and a serious health crisis.

One of the most common symptoms to watch for is a persistent cough. You might notice your dog or cat coughing as if they have a hairball or are trying to clear their throat. This cough occurs because the heartworms reside in the pulmonary arteries, causing inflammation and irritation. If you observe your pet coughing frequently, it’s time to consult your veterinarian.

Another alarming symptom is fatigue. If your pet seems unusually tired, reluctant to play, or appears to tire out quickly during walks or playtime, this could indicate heartworm infection. Imagine running a marathon without training—your body would feel exhausted, right? That’s how your pet feels when heartworms invade their system.

Weight loss is also a significant indicator. If your furry friend is eating normally but still losing weight, it could be a sign of heartworm disease. The parasites can interfere with your pet’s ability to absorb nutrients, leading to this concerning symptom.

In addition to these symptoms, you may notice some pets exhibiting a swollen abdomen. This condition, known as ascites, occurs when fluid accumulates in the abdominal cavity, often due to heart failure caused by heartworm disease. It’s a serious sign that requires immediate veterinary attention.

Here’s a quick summary of symptoms to keep in mind:

• Persistent cough
• Fatigue and lethargy
• Weight loss despite a good appetite
• Swollen abdomen

It’s important to note that symptoms can vary between dogs and cats. For instance, while dogs may show more pronounced respiratory signs, cats might exhibit less obvious symptoms, such as vomiting or difficulty breathing. This makes it essential for pet owners to be vigilant and proactive in monitoring their pets’ health.

If you suspect your pet may have heartworm disease, don’t wait for symptoms to worsen. Early intervention is key, and your veterinarian can perform the necessary tests to diagnose the condition accurately. Remember, heartworm disease is preventable, and recognizing the symptoms early can save your pet’s life.

Q: Can heartworm disease be transmitted to humans?
A: No, heartworm disease cannot be transmitted from pets to humans. However, it is a serious condition that affects dogs and cats, so prevention is essential.

Q: How often should my pet be tested for heartworms?
A: It’s recommended to have your pet tested at least once a year, even if they are on preventive medication. This ensures early detection and treatment if necessary.

Q: Are there any side effects of heartworm prevention medications?
A: Most pets tolerate heartworm prevention medications well. However, like any medication, there can be side effects. Always consult your veterinarian if you notice any unusual behavior after administering medication.

Q: What should I do if my pet shows symptoms of heartworm infection?
A: If you notice any symptoms, schedule an appointment with your veterinarian immediately for a thorough examination and testing.

Diagnosis and Testing

When it comes to heartworm disease, early detection can be a lifesaver for your furry friend. The journey to diagnosing this serious condition begins with a thorough examination by a veterinarian. They will typically start by gathering a detailed history of your pet’s health and lifestyle, which can provide crucial clues about potential exposure to heartworms. But how exactly do veterinarians confirm an infection? Let's dive into the various diagnostic methods used to detect heartworm disease.

One of the primary tools in diagnosing heartworm infection is a blood test. This test is designed to identify the presence of heartworm proteins, known as antigens, which are released into the bloodstream by female heartworms. The process is simple: a small sample of blood is drawn from your pet, and the lab analyzes it for these specific antigens. If the test returns positive, it indicates that your pet is infected with heartworms, and immediate action is necessary.

However, diagnosing heartworm disease isn't always straightforward. In some cases, the blood test might yield a false negative, especially if the infection is in its early stages or if your pet has a low number of worms. Therefore, veterinarians often recommend additional diagnostic methods to get a clearer picture of your pet's health. X-rays and ultrasounds are two commonly used imaging techniques that can provide valuable insights.

X-rays allow veterinarians to visualize the heart and lungs, helping them to assess whether the heartworms have caused any damage. For instance, an X-ray can reveal enlarged heart chambers or changes in the lungs that are indicative of heartworm disease. On the other hand, ultrasounds can provide a more detailed view of the heart’s structure and function, allowing for a comprehensive evaluation of how the disease is affecting your pet. This combination of blood tests and imaging techniques ensures that veterinarians can accurately diagnose heartworm disease and determine the best course of action.

To sum it up, diagnosing heartworm disease involves a multi-faceted approach that combines history-taking, blood tests, and imaging techniques. This thorough process is crucial not just for confirming an infection but also for assessing the severity of the disease, which can significantly influence treatment options. Remember, the earlier the diagnosis, the better the chances for a successful recovery for your beloved pet!

• How often should my pet be tested for heartworms? It's recommended to have your pet tested annually, especially if they are on preventive medication.
• Can heartworm disease be treated? Yes, heartworm disease can be treated, but it is crucial to catch it early to avoid serious complications.
• What are the risks of heartworm treatment? Treatment can be risky and requires careful monitoring, as the dying worms can cause complications in your pet's body.

Blood Tests

When it comes to diagnosing heartworm disease, are the cornerstone of veterinary medicine. These tests are not just a formality; they are essential for determining whether your beloved pet has been infected by these dangerous parasites. The process begins with a simple blood draw, which is often quick and relatively painless for your furry friend. But what exactly happens next?

Once the blood sample is collected, it is sent to a laboratory where veterinarians look for specific proteins released by adult female heartworms into the bloodstream. These proteins are known as antigens, and their presence indicates an active heartworm infection. The most common test used is the enzyme-linked immunosorbent assay (ELISA), which is highly sensitive and can detect even low levels of infection.

But wait, there's more! In addition to antigen tests, a veterinarian may also perform a microfilaria test. This test checks for the presence of the baby heartworms, or microfilariae, in the blood. If the initial antigen test comes back positive, the microfilaria test can help confirm the diagnosis and assess the severity of the infection.

It's essential to understand that while blood tests are incredibly effective, they do have their limitations. For instance, if a pet has been recently infected, the tests may not yield accurate results immediately. Heartworm larvae take several months to mature into adult worms, and it can take up to six months post-infection for the antigen tests to show positive results. Therefore, if you suspect your pet has been exposed to heartworms, it's crucial to consult your veterinarian promptly.

Here’s a quick summary of the key points regarding blood tests for heartworm diagnosis:

In conclusion, blood tests are a vital tool in the fight against heartworm disease. They not only help in confirming the presence of the infection but also guide veterinarians in determining the most effective treatment plan. So, if you notice any symptoms of heartworm disease in your pet or suspect they may have been exposed, don't hesitate to get them tested. Remember, early detection can save lives!

X-rays and Ultrasounds

When it comes to diagnosing heartworm disease, X-rays and ultrasounds are invaluable tools that provide a deeper insight into the health of your pet's heart and lungs. These imaging techniques allow veterinarians to visualize the physical state of the organs affected by heartworms, offering a clearer picture of the disease's severity and progression. Imagine peering into a hidden world where the unseen battles of parasitic infections unfold—this is exactly what these imaging methods accomplish.

X-rays, or radiographs, are often the first step in assessing heartworm disease. They can reveal changes in the heart's size and shape, as well as the presence of any fluid in the lungs, which may indicate a more advanced infection. The process is relatively quick and painless for your furry friend, requiring them to stand or lie down while the X-ray machine captures images. During this time, the veterinarian looks for signs such as:

• Enlarged heart chambers
• Fluid accumulation in the lungs
• Changes in the pulmonary arteries

On the other hand, ultrasounds take this a step further by providing real-time images of the heart and surrounding structures. This technique uses sound waves to create detailed images, allowing veterinarians to assess how well the heart is functioning and whether any heartworms are present. Ultrasounds are particularly useful for evaluating the severity of the infection and determining the best course of treatment. With this method, veterinarians can:

• Visualize the heart's chambers and valves
• Detect any movement of heartworms within the heart
• Assess blood flow and identify any blockages

Both X-rays and ultrasounds serve as critical components in the diagnostic process. They not only confirm the presence of heartworm disease but also help in formulating a tailored treatment plan for your pet. By utilizing these advanced imaging techniques, veterinarians can ensure that your beloved companion receives the most effective care possible, ultimately leading to a healthier, happier life.

Q: How often should my pet have X-rays or ultrasounds?
A: The frequency of X-rays or ultrasounds depends on your pet's health status and the veterinarian's recommendations. Typically, these imaging tests are conducted when heartworm disease is suspected or to monitor the condition of a pet already diagnosed with the disease.

Q: Are X-rays and ultrasounds safe for pets?
A: Yes, both procedures are considered safe for pets. X-rays involve a minimal amount of radiation, while ultrasounds are non-invasive and do not use radiation at all.

Q: Can I prevent heartworm disease with regular check-ups?
A: Regular veterinary check-ups, including diagnostic imaging when necessary, play a crucial role in early detection and prevention of heartworm disease. Always consult your veterinarian for the best preventive measures for your pet.

Treatment Options

Treating heartworm disease is a critical step in ensuring the health and longevity of your beloved pet. Once a diagnosis is confirmed, it's essential to act swiftly, as the longer heartworms remain in the body, the more damage they can cause. The treatment process can be quite intensive and may vary depending on the severity of the infection, the pet's overall health, and the veterinarian's recommendations. Generally, treatment involves a combination of medications and procedures aimed at eliminating the parasites from the pet's system.

The primary treatment for heartworm disease in dogs involves the use of a medication called melarsomine. This drug is administered through injections and is specifically designed to kill adult heartworms residing in the heart and pulmonary arteries. The treatment typically occurs in two or three doses, spaced out over several months. During this time, your veterinarian will closely monitor your pet's progress, as the dying worms can cause complications, such as blockages or inflammation.

In addition to melarsomine, pets may also be prescribed antibiotics to combat any secondary infections and to help prevent complications associated with the treatment. The most commonly used antibiotic is doxycycline, which targets a bacterium that lives symbiotically with heartworms. This step is crucial, as it reduces the risk of serious side effects during the treatment process.

For pets with severe infections or those that are experiencing significant health issues, hospitalization may be necessary. This allows for constant monitoring and supportive care, such as IV fluids and medications to manage symptoms. In some cases, surgical intervention may be required to remove large clumps of heartworms from the heart or lungs, especially in pets that are critically affected.

After the treatment is completed, it is vital to keep your pet calm and rested. Physical activity should be limited for several weeks to avoid complications, as the body needs time to recover and for the dead worms to be absorbed by the body. Regular follow-up visits to the veterinarian are essential to ensure that the heartworms have been fully eliminated and to monitor for any potential complications.

In summary, while treating heartworm disease can be challenging, it is a manageable process with the right veterinary care. The key is to catch the infection early and follow your veterinarian’s recommendations closely. Remember, prevention is always better than cure, so ensure your pet is on a heartworm prevention regimen to avoid this severe disease altogether.

• Can heartworm disease be treated in cats?
  Yes, heartworm disease can occur in cats, but treatment options are limited and differ significantly from dogs. There is no approved treatment for adult heartworms in cats, so prevention is crucial.
• How long does heartworm treatment take?
  The treatment process can take several months, depending on the severity of the infection and the response to the medication.
• What are the side effects of heartworm treatment?
  Common side effects may include lethargy, vomiting, and loss of appetite. It's essential to monitor your pet closely during treatment.

Preventive Measures

When it comes to heartworm disease, prevention is not just a good idea—it's essential! Imagine your pet as a beloved family member, and just like you wouldn't skip your annual health check, your furry friend deserves the same level of care. The best way to keep heartworms at bay is through a combination of effective preventive measures. These not only protect your pet but also provide peace of mind for you as a pet owner.

One of the most common and effective ways to prevent heartworm disease is through the use of preventive medications. These come in various forms, including monthly pills, topical treatments, and even injectable options that can last for several months. Each of these medications works by killing the heartworm larvae before they can develop into adult worms. It's like having a security system that stops intruders before they even get through the door! Here’s a quick overview of some popular preventive medications:

In addition to medication, regular veterinary check-ups play a crucial role in heartworm prevention. During these visits, your veterinarian can perform tests to check for any signs of heartworm infection and monitor your pet's overall health. Think of it as a routine tune-up for your car; just as you want to ensure your vehicle runs smoothly, you want to make sure your pet is in top shape. Regular check-ups can lead to early detection, which is vital for successful treatment should an infection occur.

Another key preventive measure is to keep your pet's environment as safe as possible. This includes minimizing their exposure to mosquitoes, the primary carriers of heartworm larvae. Here are some practical tips to reduce mosquito presence around your home:

• Eliminate standing water where mosquitoes breed.
• Use mosquito repellents designed for pets.
• Keep your yard well-trimmed and free of debris.
• Consider installing screens on windows and doors.

Lastly, education is a powerful tool in heartworm prevention. Understanding the risks and being proactive can make all the difference. As a responsible pet owner, staying informed about heartworm disease, its symptoms, and preventive measures can empower you to take the necessary steps to protect your furry friend. Remember, a little prevention goes a long way in ensuring a long, healthy life for your pet!

Q: How often should I give my pet heartworm prevention medication?
A: Most heartworm preventive medications should be administered monthly, but some options are available that require less frequent dosing. Always consult your veterinarian for the best schedule for your pet.

Q: Can indoor pets get heartworms?
A: Yes, indoor pets can still be at risk for heartworm infection, especially if mosquitoes can enter your home. It's essential to keep your pets on preventive medication year-round.

Q: What should I do if I miss a dose of heartworm prevention?
A: If you miss a dose, give it as soon as you remember. If it's close to the time for the next dose, skip the missed one and continue with your regular schedule. Contact your veterinarian for further advice.

Q: Are there any side effects of heartworm preventive medications?
A: Most pets tolerate heartworm prevention medications very well. However, some may experience mild side effects like vomiting or diarrhea. If you notice any concerning symptoms, consult your veterinarian immediately.

Medications

When it comes to heartworm prevention, medications are your pet's best friend. Think of these medications as a superhero cape that shields your furry companion from the lurking dangers of heartworm disease. There are several types of heartworm preventatives available, each designed to keep those pesky parasites at bay. The most common forms include chewable tablets, topical treatments, and injections. Each has its own unique benefits, making it essential for pet owners to choose the right one based on their pet's lifestyle and health needs.

Chewable tablets are often flavored, making them a tasty treat for pets. They’re typically administered once a month and contain active ingredients like ivermectin or milbemycin oxime. These ingredients work by killing the immature heartworm larvae, preventing them from developing into adult worms. On the other hand, topical treatments are applied directly to the skin, offering a convenient option for pets who might be picky about taking pills. They also provide a monthly dose of protection.

For those who prefer a longer-lasting solution, there are injectable preventatives available. These injections are administered by a veterinarian and can provide protection for up to six months. This option is particularly beneficial for pet owners who may forget to give monthly doses, ensuring that their pets remain protected without the hassle of remembering to administer medication every month.

Regardless of the type of medication chosen, it’s crucial to follow the veterinarian’s recommendations carefully. Missing a dose can leave your pet vulnerable to infection, so setting reminders or using a medication calendar can be helpful strategies. Additionally, regular testing for heartworms is essential, even if your pet is on preventive medication. This is because no preventive method is 100% effective. If a pet does become infected, the treatment can be more complicated and costly than prevention.

In summary, the right heartworm medication can be a game changer in keeping your pet healthy and happy. Consult with your veterinarian to determine the best option tailored to your pet's needs, lifestyle, and overall health. Remember, prevention is always better than cure!

• How often should I give my pet heartworm medication? It is generally recommended to administer heartworm medication once a month, but consult your veterinarian for specific guidance based on your pet's needs.
• Are there side effects to heartworm medications? Most pets tolerate heartworm preventatives well, but some may experience mild side effects such as vomiting or lethargy. Always monitor your pet after administering medication.
• Can indoor pets get heartworms? Yes, indoor pets are still at risk for heartworm disease, especially in areas where mosquitoes are prevalent. It’s essential to keep all pets on preventive medication.
• What should I do if I miss a dose of heartworm medication? If you miss a dose, give it as soon as you remember. If it's close to the time for the next dose, skip the missed one and continue with the regular schedule. Never double up on doses.

Regular Veterinary Check-ups

When it comes to keeping our beloved pets healthy, are absolutely essential. Just like how we go to the doctor for annual physicals, our furry friends need their own routine visits to the vet. These check-ups are the first line of defense against heartworm disease and many other health issues. During these visits, vets can perform crucial examinations and tests that help in early detection of potential problems. Think of it as a health insurance policy for your pet—one that ensures they remain happy and healthy for years to come.

One of the key benefits of these check-ups is that they allow veterinarians to assess your pet's overall health and identify any signs of heartworm infection before it becomes a serious issue. The vet can conduct a variety of tests, including blood tests and physical examinations, to look for early signs of heartworm disease. This proactive approach is essential because, as we know, early detection can be a game-changer. It’s much easier and less expensive to treat a problem when it’s caught early.

Moreover, regular visits help to establish a baseline of your pet's health. This means that if something does go wrong, your vet has a point of reference to compare against. For example, if your dog has a sudden drop in energy levels or starts coughing, your vet can look back at previous check-up records to see if there have been any changes in their health over time. This can significantly aid in diagnosis and treatment.

Another important aspect of these check-ups is the opportunity to discuss preventive measures, including heartworm prevention. Your veterinarian can recommend the most suitable preventive medications based on your pet's lifestyle, age, and health status. In addition to heartworm prevention, these visits are also a great time to talk about vaccinations, flea and tick prevention, and other health-related topics.

To sum it up, regular veterinary check-ups are not just a routine chore; they are a vital part of responsible pet ownership. By staying on top of your pet's health through these visits, you are investing in their long-term well-being. Remember, a healthy pet is a happy pet, and nothing beats the joy of seeing your furry companion thrive!

• How often should I take my pet to the vet? Most vets recommend annual check-ups for healthy pets, while older or ill pets may need to visit more frequently.
• What should I expect during a veterinary check-up? Expect a thorough examination, vaccinations, and discussions about diet, behavior, and preventive care.
• Are check-ups expensive? While there is a cost associated with veterinary visits, the investment can save you money in the long run by preventing serious health issues.
• Can I skip check-ups if my pet seems healthy? Skipping check-ups can be risky; many health issues are asymptomatic in the early stages.

Frequently Asked Questions

• What is heartworm disease?

  Heartworm disease is a serious condition caused by parasitic worms that primarily affects dogs and cats. These worms are transmitted through mosquito bites and can lead to severe health issues, including heart failure and even death if left untreated.

• How do I know if my pet has heartworms?

  Recognizing the symptoms of heartworm infection is crucial. Common signs include coughing, fatigue, weight loss, and difficulty breathing. If you notice any of these symptoms, it's essential to consult your veterinarian for proper diagnosis and testing.

• How is heartworm disease diagnosed?

  Veterinarians typically use blood tests to diagnose heartworm disease. These tests check for specific antibodies or the presence of adult heartworms in your pet's bloodstream. Additionally, imaging techniques like X-rays or ultrasounds can help assess the severity of the infection.

• What are the treatment options for heartworm disease?

  Treatment for heartworm disease usually involves a series of medications to kill the adult worms and microfilariae. In severe cases, your veterinarian may recommend more invasive procedures to remove the worms. It's crucial to follow your vet's guidance closely during this process.

• How can I prevent my pet from getting heartworm disease?

  The best way to prevent heartworm disease is through regular administration of preventive medications. These come in various forms, including chewables, topical treatments, and injections. Regular veterinary check-ups are also vital for early detection and ongoing prevention.

• Are heartworm preventatives safe for my pet?

  Yes, heartworm preventatives are generally safe for pets when used as directed. However, it's essential to consult with your veterinarian to choose the best option for your pet's specific needs and health conditions.

• How often should my pet be tested for heartworms?

  It’s recommended that pets receive a heartworm test at least once a year, even if they are on preventive medication. Regular testing helps ensure that your pet remains healthy and that the preventive measures are effective.

• Can heartworm disease affect cats?

  Yes, heartworm disease can affect cats, although it is less common than in dogs. Cats can experience severe symptoms, but they often show different signs. If you suspect your cat may have been exposed, consult a veterinarian for advice and testing.