Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Cats Get Bitten by Mosquitos? Vet-Reviewed Risks & Preventions

Macro photo of a mosquito on a leaf

Pesky mosquitos can ruin a peaceful summer evening. As you swat and scratch your way through a swarm of these pesky insects, you might envy your pets’ protective fur coats. But is your kitty truly safe, or can cats get bitten by mosquitos?

Not only can cats get bitten by mosquitos, but they can also be infected with diseases passed on by the insects. In this article, we’ll discuss why mosquito bites can be uncomfortable and dangerous for your cat. We’ll also learn the best ways to protect your cat from these pests.

divider 3 paws

How Mosquitoes Bite Cats

While a cat’s fur provides some protection from mosquitoes, areas with thin coat coverage are vulnerable to bites, such as the ears and nose. Just as they do with humans, the mosquito spears the cat’s skin with its sharp mouth called a proboscis.

While sucking blood, the mosquito injects saliva into the cat’s body, causing them to react with itching and a bump. Outdoor cats are more likely to encounter mosquitos, but indoor cats aren’t completely safe either. Mosquitos can easily enter the house and feast on its inhabitants, including the family cat.

divider 1 paws

The Dangers of Mosquito Bites for Cats

Like with dogs, the primary danger of mosquito bites for cats is developing heartworms.

sleeping cat bitten by mosquito on its nose
Image by: Irina Soboleva S, Shutterstock

Heartworms

What Are Heartworms?

Heartworms (Dirofilaria immitis) are parasitic worms that infest and damage the pulmonary arteries and hearts of infected cats. Mosquitos are the source of infection and the secondary host of these parasites. The insects become infested with immature worms known as microfilariae, which feed on an animal with heartworms.

The worms continue to develop in the mosquito until they are passed to a new host through a bite. After the young heartworms enter the bloodstream of a cat or dog, they migrate to the walls of the pulmonary arteries and the heart, where they finish their maturation cycle into the adult Dirofilaria immitis and begin reproducing microfilariae.

Heartworms grow 3–14 inches long, posing a life-threatening risk to their host. The worms can clog the blood flow from the heart or cause a deadly allergic reaction.

Cats & Heartworms

Dog owners are typically much more aware of the danger of heartworms because dogs are at higher risk of infection. Cats are believed to be somewhat resistant to the parasites, but recent research suggests that feline heartworm infections occur more often than previously thought.

About 1/3 of infections occur in indoor cats, which should serve as a wake-up call to those who think their pets are safe because they don’t go outdoors. Heartworm disease is hard to confirm in cats because available diagnostic tests do not catch every infection. The signs are also quite variable, and some severely infected cats are found dead without displaying any previous signs. Common signs of heartworms in cats include:

  • Coughing
  • Trouble breathing
  • Weight loss
  • Vomiting
  • Lethargy
  • Collapse
  • Fast heart rate
  • Neurological signs (incoordination or loss of balance)

Unlike with dogs, there are no suitable treatments for heartworms in cats. The few available treatments pose a significant risk to the cat. Because of that, vets recommend that cats receive heartworm-preventative medication, just like dogs.

Preventing an infection is much safer, more successful, and more cost-effective than attempting to treat heartworms in a cat.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

Preventative wellness PGV mention keep cat healthy Preventative wellness PGV mention keep cat healthy mobile

divider 3 paws

Preventing Mosquito Bites in Cats

Unfortunately, most products used to repel mosquitos in humans are toxic to cats. These include bug sprays with DEET, citronella, and many essential oils. Because cats groom themselves, they can quickly ingest the products applied to their coat with dangerous results.

Some dog flea and tick preventatives also repel mosquitos, but they are not meant for cats and can be toxic to them. Never use products labeled exclusively for dogs on your cat.

applying flea treatment to cat
Image by: Csaba Deli, Shutterstock

Preventing mosquitoes in your home and yard will also help keep your cat safe. Removing any source of standing water—necessary for the insects to reproduce—in your yard is one of the most effective ways to limit mosquitos.

Commercial pest control is another option, but ensure your exterminator knows you have cats so they can take all necessary precautions. Several mosquito-repelling herbs like basil, rosemary, and lemon balm are safe for cats. You can plant them in a garden or grow them in pots to discourage mosquitos from staying in your yard.

divider 2 cats

Conclusion

Mosquitos bite humans and cats, both indoors and outside. Mosquito bites will not only make your cat scratch but could also put them at risk of developing life-threatening heartworm disease. Keeping your cat on a heartworm preventative will keep them safe from these mosquito-borne parasites. Because most mosquito repellents are toxic to cats, concentrate on preventing mosquitoes in the environment instead. Check with your vet before applying any new product to your cat.


Featured Image: Satheesh Cholakkal, Pexels

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Tortoiseshell Cat vs. Calico: How to Spot the Difference (With Pictures)

The gorgeous housecat can harbor so many different colors, patterns, and textures when it comes to its fur. Certain coat types can cause...

What Does It Mean When a Black Cat Crosses Your Path? Myths Unveiled

The sight of a black cat on a dark night can cause shivers to run up one’s spine. Black cats often appear in...

5 Vet-Verified Reasons Why Cats Need a Scratching Post

A scratching post may seem like an unnecessary purchase for your cat, but this cat-friendly item is actually critical for your cat’s comfort,...

Are There Cat Hemp Treats? Vet-Verified Health & Safety Facts

With hemp products becoming more and more popular, pet owners worldwide are increasingly wondering if hemp-based products can be offered to cats. The...

More related

How to Switch to Eco-friendly Cat Litter: 6 Steps to Make the Change

Let’s face it: As much as we adore our cats, dealing with cat litter is not anyone’s idea of a good time! Not...

Is It Better to Have Two Cats (or More)? Vet-Verified Factors to Consider & Tips

Cats are some of the most misunderstood animals. Many ideas people have about them are anecdotal or based on folklore. We know that...

Can Cats Eat Cool Whip? Vet-Approved Nutritional Facts & Safety Tips

If your cat accidentally snacks on some cool whip, then they will likely be fine. Cool whip is not toxic for cats and...

Siamese Kittens for Sale in North Carolina: Breeders List 2026

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

Keep reading

Will Cats Get Along With Ferrets? How They Can Coexist

If you are a cat parent but want to introduce a ferret into your family, you’re probably wondering if the two will get along. These animals are similar and have complementary temperaments, which is why they can technically get along....

Cats and ferret get along

How to Retrain a Cat to Use a Litter Box: 13 Vet-Approved Tips

Inappropriate elimination can be difficult to deal with, resulting in ruined belongings and strained relations between cats and their favorite people. It’s one of the most commonly reported behavioral problems in cats. Litter box issues are often caused by stress,...

Ginger cat in blue litter box

How to Play With Your Cat: 10 Vet-Approved Tips & Ideas

Playing with your cat is a great way to pass the time, get a few laughs, and build a close bond with your feline friend. Not only that, but it’s also necessary to keep your cat happy. Each cat finds...

woman-playing-with-her-cat

Why Does My Cat Hunt? Vet-Approved Behavior Science & Information

If you make sure your cat is always well-fed and has plenty of toys, it can be frustrating to find that they still want to hunt. Whether that’s catching something in your backyard or stalking the dog, most cats can’t...

Black Oriental Shorthair in the grass

My Cat Is a Scaredy Cat: 5 Tips to Make Them Feel More Secure

Cats can be apprehensive for all sorts of reasons. If you share your home with a scaredy-cat, finding a neutral ground and saving space for them could be pretty complicated. Certain environmental factors will stimulate different cats. Some might be...

scared British blue-point cat hiding under the bed

How Long Do Cats Live? Feline Lifespan Facts Explained (Vet Approved)

We’ve all heard that cats have nine lives. But how much of that is actually true? Do cats seem to escape brushes with death regularly? If the cat lives an expected average of years, how long is that usually? According...

Silver Tabby Norwegian Forest Cat

Can Cats Eat Peanut Butter? Vet-Reviewed Facts & FAQ

Peanut butter is a snack loved by humans and dogs alike, but is this sweet, nutty treat something you should share with your cat? As delicious as PB is, this food should not be added to your cat’s treat rotation....

Can Cats Eat Peanut Butter

Is Alstroemeria Toxic to Cats? Vet-Approved Advice

If your cat just ate some of your Peruvian Lily or rubbed on the petals you may be panicking. Although The ASPCA lists Peruvian Lily, also known as Alstroemeria, as safe for cats, dogs, and even horses, it is listed...

Catster_Is Alstroemeria Toxic to Cats

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.