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.

How Do Cats Get Worms? Vet Reviewed Causes, Signs & Prevention

sick ginger cat

Finding worms in your favorite feline’s poop or around their butt is never pleasant. But it is not uncommon for our pets to come down with parasites, such as worms, even if your cat is strictly an indoor pet. But how do cats get worms in the first place? There are a handful of ways for cats to catch worms (and a few worms they can get), and it’s essential to know these so you can reduce the risk of transmission to yourself or other pets in the home.

The most common ways a cat can get worms is by mosquitoes, or by eating infected feces, mice, or fleas. Knowing how to treat worms is vital, so you can get your feline feeling healthy again. In this article, we’ll discuss how your cat can get worms, what signs to look for, and how to treat and prevent them.

divider 3 paws

The 4 Worm Types in Cats and How They Are Caught

Cats can get a few types of worms, and some are more common than others1.

1. Tapeworms

Tapeworms
Image Credit: Rattiya Thongdumhyu, Shutterstock

Tapeworms are common in cats. They’re long and flat with segmented sections and live in a cat’s small intestines. Tapeworms look like grains of rice when you find them in feces or around a cat’s rectum. Taenia taeniaeformis is the most common form of tapeworm and is passed to cats when they eat an infected flea.


2. Heartworms

You give your cat heartworm prevention medicine to protect them, but unlike for dogs, there isn’t an effective cure if they’re infected. Heartworms can be fatal because they cause damage to the lungs and heart.

The good news is that felines are more resistant to worms than canines, but cats can still get them. The heartworm is usually passed to cats by mosquitoes; mosquitoes drink from an infected animal and then carry the heartworm larvae to the next animal they attack.


3. Roundworms

cats roundworms
Image Credit: Todorean-Gabriel, Shutterstock

Roundworms are comprised of three species; Toxocara canis is the most common (and the one that can spread to people). However, Toxocara cati is a roundworm species that can be passed to kittens from their mothers via milk. However, most roundworms are acquired by eating feces containing roundworm eggs.

Lungworms are another less common roundworm a cat can get. As the name indicates, they are found in the lungs and lower respiratory tract. They start in the intestines but then make their way to the lungs. They are commonly undiagnosed because some signs of an infection resemble those of a regular respiratory condition.

Eyeworms are less common than other roundworms on this list, and as the name suggests, they affect the eye. The white worms are long but small enough to move across the eye’s surface and hide in tear ducts. They can cloud the cornea and cause watery, itchy eyes. They’re transmitted by flies depositing larvae in the eye.


4. Hookworms

Hookworms are also fairly common in some countries and environments. The most common hookworms in cats are Ancylostoma. The worms burrow into the intestinal lining, causing gastrointestinal issues such as bleeding and weight loss. They are typically caught when cats eat infected feces or animals (like mice). The worms can also be passed to a cat if their skin is penetrated.

divider 3 paws

Signs of Worms in Cats

If your cat has worms of any kind, they may show signs, but some are easier to spot than others. Signs of lungworm are the most difficult to detect since they resemble several respiratory conditions.

But if worms are present, you should see one or several of the following:
  • Worms in feces
  • Bloody feces
  • Worms around the anus
  • Vomiting
  • Diarrhea
  • Coughing
  • Lethargy
  • Weight loss
  • Loss of appetite
  • Anemia
  • Pot-belly
  • Dull coat

divider 3 paws

Treatment and Prevention of Worms in Cats

Luckily, worms are treatable in cats, and there are ways you can prevent them from occurring in the first place.

Treatment

As soon as you suspect your cat has worms, take them to the vet for a proper diagnosis. Once the worm has been determined, your vet can prescribe deworming medication that is either injectable or oral.

Giving your cat home remedies for worms is inadvisable since they may be ineffective. Worms that aren’t treated can, in some cases, lead to a fatal outcome.

cat getting a shot from a vet
Image Credit: Kachalkina Veronika, Shutterstock

Prevention

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!

PangoVet_Mention-in-Content for PangoVet2 save money

Of course, an ounce of prevention is worth a pound of cure, so working to prevent worms from infecting your cat is always preferable!

There are several ways to go about this, including:
  • Not having more than one cat per litter box
  • Regular worm/heartworm treatment
  • Deworming treatments for kittens until the age of six months
  • Yearly vet visit for a check-up
  • Using tick and flea prevention on your pet
  • Preventing rodents from infesting your home

divider 3 paws

Final Thoughts

It’s not fun for anyone when your cat has worms! Now that you know the types of worms your pet can come into contact with and how they come into contact with them in the first place, you should have an easier time preventing your feline friend from getting worms. However, if prevention doesn’t work, your vet can treat your cat with deworming medication. Here’s to happy, healthy kitties!


Featured Image Credit: Jumpstory

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

Ocelot vs Savannah Cat: How Are They Different? (With Pictures)

The Ocelot and Savannah Cat share several similarities; both cats have a black spotted coat and a tan color. Both are very energetic...

Can Young Cats Develop Diabetes? Our Vet Explains Signs, Treatment & FAQ

Diabetes is a complex metabolism condition affecting many animals, including cats. With estimates reaching 1% of the cat population 1, it’s easy to...

How to Shave a Cat’s Bum: 6 Vet-Approved Steps

If you’re starting to notice an unpleasant odor following your cat, and if you’re starting to see unpleasant remnants in their nether regions,...

10 Best Soft-Sided Cat Carriers in 2025 – Reviews & Top Picks

Traveling with your cat can be a lot of work, especially if it’s an escape artist. Whether you want to hike with your...

More related

10 Ways to Entertain Your Cat While He’s Home Alone

As much as you may want to, you can’t spend every waking moment with your cat. After all, someone has to work to...

8 Winter Cat Grooming Tips to Help Kitty Through the Cold Months

There’s something so magical about autumn. The weather turns crisp, and there are many glorious leaf colors! However, winter is just around the...

Cat Lymph Nodes: Vet-Verified Health Facts, Guide & Diagram

Lymph nodes are present in humans and cats, but most of us are not aware of their existence unless there’s a problem. They...

Can Cats Eat Just Wet Food? Vet-Reviewed Facts & FAQ

Cats are curious creatures known for their unique personalities, occasional mischievous behavior, and dietary needs. As such, there is a lot of debate...

Keep reading

Can Cats Eat Mustard? Vet-Verified Risks & Precautions

A cat sneaking a taste of the turkey sandwich you accidentally left on the counter can seem harmless until you consider everything that might be in it. While many toppings like lettuce or mayo may be safe for cats to...

Catster_Can Cats Eat Mustard_v1_Dec 4 2024

8 Best Cat Foods for Healthy Skin & Coats in 2025: Reviews & Top Picks

We all want our felines to be happy and healthy. However, sometimes they have problems with their skin and coat. It may be due to skin sensitivities or food allergies. Often, it is difficult to treat, and flare-ups are common....

Devon Rex tabby cat eating wet tuna food

How Tight Should a Cat Collar Be? Vet-Approved Sizing & Tips

Choosing the right collar for your cat is vital to keep them safe, but once you’ve got their shiny new collar, how tight should it be? This is a question that many cat owners ask. In brief, you should be...

cat collar

Tiki Cat – Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary With so many different brands on the market, it can be tough to figure out which type of cat food to invest in for your feline family member. If you’re like most pet owners, choosing a quality food...

Tiki Cat Food Review

Can Cats Eat Flaxseeds? Vet-Approved Nutritional Facts & FAQ

Cats are carnivores, and in the wild, they would not give plant-based foods a second thought. Instead, they would focus on hunting down small animals to get protein and other nutrients. As domesticated animals, cats rely on us to make...

Can Cats Eat Flaxseeds

How Often Should You Wash a Cat’s Bed: Vet-Reviewed Tips & Tricks

Just like you should wash your bedding every week or two, the same is true for your cat’s bedding. Ideally, you’ll want to wash it once a week, but if they don’t spend all that much time using it, you...

Cat near a Washing Machine

How to Teach a Cat to Sit: Step-by-Step Guide

When you think of behavior training for a pet, you typically think of dogs. However, despite their well-known stubborn and independent streaks, it’s completely possible to train a cat to sit. It’s going to take persistence and timing, but if...

cat obediently sitting on the floor

Hookworms in Cats: Vet Reviewed Causes, Signs & Care

Your cat has just been diagnosed with hookworms, and you’re curious about where they got them, how you are supposed to care for your cat, and how to prevent them from getting hookworms again in the future. Well, hookworms are...

Abyssinian cat check by vet