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You might think heartworms only affect dogs. But here’s an important fact: cats can get heartworms too. While it’s less common than in dogs, heartworm disease can be serious for our feline friends. Let’s explore what you need to know to keep your cat safe.
What Are Heartworms?
Heartworms are parasites caused by Dirofilaria immitis. These worms can grow quite large – males reach 5-6 inches and females can grow 10-12 inches long. They live in the heart and lungs, which is why they’re so dangerous.
How Do Cats Get Heartworms?
The only way cats get heartworms is through mosquito bites. When a mosquito bites an infected dog, it picks up baby heartworms called microfilaria. These babies grow inside the mosquito and become larvae. When that same mosquito bites your cat, it passes along these larvae.
It’s important to know that dogs are the main host for heartworms. Cats are what we call “atypical hosts,” which means heartworms don’t develop as easily in cats as they do in dogs.
Signs Your Cat Might Have Heartworms
Heartworms in cats usually cause breathing problems. Watch for these signs:
- Coughing or wheezing
- Difficulty breathing
- Fast breathing
- Vomiting (not related to eating)
- Loss of appetite
- Weight loss
- Lethargy or weakness
Some cats might not show any signs at all. Others might have sudden, severe breathing problems or even collapse.
How Heartworms Affect Cats Differently
Cats handle heartworm infections differently than dogs. Most cats have fewer worms, and the worms don’t live as long. However, even a small number of heartworms can cause serious lung damage in cats. Sometimes, cats can have severe reactions when the worms die naturally.
Prevention
The good news is that heartworms can be easily prevented. Several preventatives are available for cats. These preventatives should be given even to indoor cats. Remember, mosquitoes can get inside homes. Talk to your veterinarian about adopting an appropriate preventative strategy. Your vet can recommend the right medication and schedule based on your cat’s specific needs and your local risk factors.
Testing and Treatment
Unlike dogs, there isn’t a simple blood test to diagnose heartworms in cats. Your vet might use different tests and X-rays to check for heartworms.
Treatment is also different for cats. There’s no approved medication to kill adult heartworms in cats like there is for dogs. Instead, treatment focuses on managing symptoms and supporting your cat’s health while the worms die naturally. Remember prevention is much easier and safer than treatment when it comes to heartworms in cats.
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Animal Wellness is North America’s top natural health and lifestyle magazine for dogs and cats, with a readership of over one million every year. AW features articles by some of the most renowned experts in the pet industry, with topics ranging from diet and health related issues, to articles on training, fitness and emotional well being.
