So, if you’ve noticed your best friend acting strangely or showing even the subtlest signs of discomfort, worms might be the problem. 

In this guide, we’ll show you the basics. From the types of worms cats can expect, all the way to how to prevent them. 

What Are the Types of Worms in Cats?

Worms are parasites that live inside a cat’s body. They feed off your cat’s nutrients and can cause diseases. Along with this, they can cause irritation and organ damage, which is a severe complication. Here are the common types of worms in cats: 

Roundworms

Roundworms are the most common parasitic worms in cats. The worms themselves look like long, white, spaghetti-like parasites. They are about 3 to 5 inches long. 

These worms live in the cat’s intestines, where they steal nutrients. They are particularly prevalent in kittens, mostly because of their underdeveloped immune systems. Since they interfere with nutrient absorption, they can also get in the way of a cat’s growth and energy levels. 

Cats can get roundworms by ingesting the eggs from contaminated environments, such as soil, feces, and organic matter. They can also get them from eating infected prey, which can be a concern if your cat frequently goes outside. 

Additionally, infected mothers can pass the larvae to their kittens through their milk during nursing.

The usual symptoms of roundworms in cats are: 

• Bloated or swollen belly

• Vomiting and diarrhea

• Lethargy and weight loss

• Poor coat condition

• Visible worms in the stool

Tapeworms

Tapeworms are also a common parasite in cats. They are flat, segmented worms that attach to the walls of the small intestine. While they can grow long, the multiple segments, called proglottids, can break off. These look like grains of rice and are often seen in your cat’s feces. 

Because they reside within the cat’s small intestines, they pose a significant problem for growth and development. So, even though your cat is eating normally, they can still lose a considerable amount of weight and energy. 

Cats can get tapeworms by swallowing fleas while grooming themselves. They can also get these parasites by eating infected raw meat and prey. Mother cats can also pass tapeworms through the placenta or milk. 

The signs of a tapeworm infection in cats include:

• Small, white segments in poop or near the anus

• Scooting or licking of the rear

• Increased appetite without weight gain

• Mild gastrointestinal issues

• Restlessness and discomfort

Hookworms

Hookworms are another type of worm in cats. These are small and thin worms, just about half an inch. They attach to the cat’s intestinal lining by using their signature hook-like mouthparts. Unlike other types, these worms feed on your cat’s blood. Hookworms are also common in kittens.

Because these parasitic worms in cats feed on blood, they are extremely dangerous. When untreated, this can result in significant blood loss and anemia. 

Cats can get hookworms mainly by ingesting them in the environment. Since the eggs are shed in the feces, contaminated water, soil, and feces are huge concerns. A cat can get infected by walking into contaminated spaces and then grooming itself.

Cats can also get these parasites by consuming infected animals. Plus, hookworms can also be transmitted through the milk of their mothers.

Common signs include: 

• Pale gums or tongue

• Bloody or dark stool

• Weight loss despite normal appetite

• Weakness, low energy, and lethargy

• Poor coat condition

Whipworms

Whipworms are thin, whip-shaped worms that live in the large intestine and cecum. The cecum is essentially the area where the small and large intestines meet. 

These worms in cats cause inflammation and irritation, leading to chronic gastrointestinal issues. They aren't that prevalent compared to other cat worms, but they're still dangerous. 

The main way cats can get whipworms is by ingesting their eggs through contaminated water, feces, and soil. Also, another mode of transmission is when they groom themselves after their bodies have been exposed to these elements. 

Whipworm eggs are hardy and can survive in the environment for long periods of time, which means cleaning your home regularly will be an important preventive routine.

The signs of whipworms in cats include:

• Vomiting and discomfort

• Diarrhea with mucus or blood

• Abdominal pain

• Dehydration

• Anemia and lethargy

Lungworms

These worms in cats target the respiratory system, causing damage deep in the lung tissue, windpipe, and bronchi. Common types include Aelurostrongylus abstrusus and Capillaria aerophilus. 

Cats can get lungworms when they ingest the larvae from the environment, most commonly from hunting and eating infected prey. This includes rodents, birds, lizards, and frogs. They can also get infected by lungworms when they swallow snails, slugs, earthworms, or water that carries the parasite. 

Once the lungworms get into the cat, they travel from the intestinal tract to the bloodstream, where they settle in the lungs. This is where they develop into adults and start causing issues within.

Common signs of lungworms in cats include: 

• Persistent coughing

• Breathing problems

• Sneezing and nasal discharge

• Reduced activity and lethargy

• Poor appetite

Heartworms

Heartworms are parasitic worms in cats that look like spaghetti. While cats are often less ideal hosts compared to dogs, they can also be affected. Hearworms cause serious respiratory disease, heart failure, and even sudden death. 

Transmission begins when a mosquito bites an infected animal and picks up the larvae. Once they reach a cat and start feeding on the blood, they transmit the larva to the cat. Cats are also resistant hosts, so most worms do not survive adulthood. 

Instead, they may die in the lungs, causing heartworm-associated respiratory disease. If they survive, they reside in the heart and lungs, causing severe organ damage.

Common signs include: 

• Chronic coughing, gagging, or open-mouth breathing

• Lethargy and weight loss

• Fainting and seizures

• Intermittent vomiting

• Sudden collapse or death

Can Kittens Get Worms?

Yes, kittens can most certainly get worms, and they’re even more prone than adult cats. This is because their immune systems are still developing. Plus, they still haven’t received the routine deworming medications they need. 

Another factor is their mother. If a mother cat is infected, her kittens can get worms through the placenta or the milk itself.