Intestinal worms are the most common health issue in cats, yet they often go unnoticed until symptoms become serious. These parasites can affect cats of all ages, whether they are indoor or outdoor pets. Worm infestations can cause poor coat condition, digestive problems, weight loss, and even more severe health complications if left untreated. As a pet parent, understanding the causes, symptoms, and treatment options is essential for keeping your feline friend happy and healthy.

In this blog, we’ll walk you through everything you need to know about intestinal worms in cats — from types and transmission to prevention and treatment.

What Are Intestinal Worms in Cats?

Intestinal worms are internal parasites that feed on blood or nutrients in your cat’s digestive system. Depending on the type and infestation level, these parasites have the potential to trigger a range of health problems, from mild discomfort to serious conditions. Understanding the different types of intestinal worms can help you identify the risks and choose the right treatment.

Here are the most common types of intestinal worms found in cats:

1. Roundworms (Toxocara cati and Toxascaris leonina)

Roundworms are the most widespread intestinal parasite in cats, especially in kittens. They look like thin strands of spaghetti and can reach a few inches long. Cats typically contract roundworms by ingesting infected prey (like rodents), contaminated soil, or feces. Kittens can also acquire them through their mother’s milk.

Symptoms:

• Swollen belly
• Diarrhea or constipation
• Poor coat condition
• Vomiting (sometimes with worms visible)
• Stunted growth in kittens

Risks: Roundworms are zoonotic and can infect humans, especially children, potentially causing visceral larva migrans.

2. Tapeworms (Dipylidium caninum, Taenia spp.)

Tapeworms are flat, segmented worms that attach to the cat’s intestines. They are usually transmitted when a cat ingests an infected flea or rodent. You may see rice-like segments of tapeworms near your cat’s anus or in their feces.

Symptoms:

• Itching or scooting around the rear
• Visible worm segments in feces
• Vomiting
• Weight loss in severe cases

Prevention Tip: Controlling fleas is essential in preventing tapeworm infections.

3. Hookworms (Ancylostoma tubaeforme)

Hookworms are thin and small worms that attach to the intestinal wall and feed on your cat’s blood. They are more dangerous than other worms, especially in kittens, as they can cause severe anemia. Cats become infected through the ingestion of larvae or skin penetration.

Symptoms:

• Pale gums
• Weakness or fatigue
• Bloody or dark stools
• Diarrhea
• Weight loss

Risks: Hookworms can also infect humans through skin contact, especially when walking barefoot on contaminated soil.

4. Whipworms (Trichuris felis)

Whipworms are relatively rare in cats but can still cause problems. They reside in the large intestine and are whip-like in shape. In most cases, cats become infected by consuming contaminated food or water.

Symptoms:

• Chronic diarrhea
• Weight loss
• Mucus in the stool
• Inflammation of the colon

Though not commonly seen in all areas, Whipworms may still be a concern in specific environments where conditions support their survival.

5. Stomach Worms (Ollulanus tricuspis)

These lesser-known parasites live in the stomach lining. They are often spread when cats ingest vomit containing the worms, and they are more common in multi-cat environments.

Symptoms:

• Chronic vomiting
• Loss of appetite
• Weight loss
• Diagnosis is usually done by examining the vomit rather than the feces.

How Do Cats Get Worms?

Cats can become infected in various ways:

• Ingesting fleas or rodents carrying worm larvae.
• Grooming contaminated fur or surfaces.
• Consuming infected raw meat or prey.
• Contact with feces from infected animals.
• Transmitted through the mother’s milk to kittens.

Even indoor cats are not entirely safe, especially if they live in multi-pet households or environments with flea infestations.

Symptoms of Worms in Cats

While some cats may show no signs, others may display clear symptoms. Watch out for the following:

• Visible worms or segments in feces or around the anus
• Diarrhea or soft stools
• Vomiting (sometimes with worms present)
• Weight loss despite normal appetite
• Bloated or distended belly
• Dull or dry coat
• Excessive licking or Scooting of the anal area
• Lethargy or decreased activity

If you observe any of these signs, consult a veterinarian for a proper diagnosis.

Diagnosing Intestinal Worms in Cats

Veterinarians typically diagnose worms through a fecal test, examining a sample of your cat’s stool under a microscope to detect parasite eggs or larvae. In some cases, physical symptoms like visible worms in vomit or stool can also lead to a diagnosis.

Treatment Options for Intestinal Worms in Cats

Luckily, intestinal worms in cats are treatable. Your vet may recommend:

• Deworming medications (available as tablets, topical solutions, or injections)
• Flea control products to prevent tapeworm reinfection
• Follow-up treatments to ensure all parasites and larvae are eliminated

Never attempt to self-medicate your cat without professional advice. Using the wrong treatment or giving an improper dose can harm your pet’s health.

Can Humans Get Worms from Cats?

Yes, some cat worms—such as roundworms and hookworms—are zoonotic, meaning they can infect humans. Young children and individuals with weakened immune systems face a greater risk of infection. Good hygiene, including washing hands after cleaning the litter box or playing with pets, is essential.

How to Prevent Intestinal Worms in Cats

Prevention is always better than a cure. Here’s how you can protect your cat:

• Regular deworming as recommended by your vet (usually every 3 months)
• Monthly flea treatments to stop the cycle of tapeworm infections
• Maintain clean litter boxes and dispose of feces promptly
• Avoid feeding raw or undercooked meat
• Keep your cat safely indoors or monitor any outdoor activity to reduce exposure to potential risks.
• Regular vet check-ups and stool tests

When to See the Vet

Schedule a vet visit immediately if your cat shows any signs of a worm infection. Prompt detection and timely treatment can help avoid serious complications and support a smoother, quicker recovery. Even if your cat appears healthy, regular wellness exams and preventive care are key to long-term health.

Final Thoughts

Intestinal worms in cats are more common than many pet owners realize. You can keep your feline companion free from these pesky parasites with the right care, awareness, and preventive steps. Whether you have a playful kitten or a senior cat, staying informed about intestinal worms is crucial to their health and well-being.

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