Cats are susceptible to various parasitic infections that can significantly impact their health and well-being. Recognizing cat parasites and their transmission methods, symptoms, preventive measures, and treatment options is essential for every cat owner. This article delves into the most common cat parasites affecting felines, including both internal and external types, and provides valuable insights on how to protect our feline companions from these harmful organisms. By understanding the threats posed by cat parasites, owners can take proactive steps to ensure the health and longevity of their beloved pets.
Types of Parasites in Cats
1. Internal Parasites (Endoparasites)
Internal parasites live inside a cat’s body, primarily in the intestines, blood, or other organs. If left untreated, these parasites can lead to severe health complications.
Roundworms (Toxocara cati, Toxascaris leonina)
- These are among the most common intestinal parasites found in cats.
- Kittens often acquire them through their mother’s milk.
- Symptoms include vomiting, diarrhea, bloated stomach, and weight loss.
- Diagnosis is made through fecal examination.
- Treatment involves deworming medications like pyrantel pamoate or fenbendazole.
Hookworms (Ancylostoma tubaeforme, Ancylostoma braziliense)
- Hookworms attach to the intestinal lining and feed on the cat’s blood, leading to anemia.
- Cats get infected by ingesting larvae from contaminated environments or skin penetration.
- Symptoms include dark, tarry stools, anemia, weakness, and weight loss.
- Treatment includes anthelmintics like moxidectin and milbemycin.
Tapeworms (Dipylidium caninum, Taenia spp.)
- Cats become infected by ingesting infected fleas or rodents.
- Tapeworm segments, resembling grains of rice, may be seen near the cat’s anus or in feces.
- Symptoms are usually mild but may include anal irritation, weight loss, and vomiting.
- Treatment involves praziquantel-based dewormers and flea control.
Giardia (Giardia duodenalis)
- A microscopic protozoan parasite that causes severe diarrhea in cats.
- Infection occurs through contaminated food, water, or fecal matter.
- Diagnosis is made via fecal tests.
- Treated with metronidazole or fenbendazole.
Toxoplasmosis (Toxoplasma gondii)
- A zoonotic protozoan infection that affects both cats and humans.
- Cats acquire it by eating infected prey or raw meat.
- Symptoms in cats are rare but may include fever, lethargy, and respiratory distress.
- Prevention includes keeping cats indoors and avoiding raw diets.

2. External Parasites (Ectoparasites)
External parasites affect a cat’s skin, ears, and fur, causing irritation and potential disease transmission.
Fleas (Ctenocephalides felis)
- The most common external parasite in cats.
- Causes severe itching, hair loss, flea allergy dermatitis (FAD), and anemia in kittens.
- Can transmit tapeworms and Bartonella (cat scratch disease).
- Prevention and treatment involve topical or oral flea preventatives like selamectin, fluralaner, or imidacloprid.
Ticks (Ixodes spp., Rhipicephalus spp.)
- Ticks attach to a cat’s skin and feed on blood.
- Can transmit serious diseases such as hemobartonellosis and Lyme disease.
- Prevention involves tick collars, topical treatments, and regular tick checks.
Ear Mites (Otodectes cynotis)
- Highly contagious mites that infest a cat’s ear canal.
- Causes intense ear scratching, head shaking, and dark ear discharge resembling coffee grounds.
- Treated with topical medications like selamectin or ivermectin.
Lice (Felicola subrostratus)
- A rare ectoparasite in cats, usually affecting those in poor health.
- Causes itching, hair matting, and skin infections.
- Treatment includes topical insecticides like fipronil or lime sulfur dips.
3. Mange (Notoedres cati – Feline Scabies)
- A severe skin condition caused by mites.
- Symptoms include intense itching, crusty skin, and hair loss.
- Highly contagious among cats.
- Treatment involves medications like selamectin or ivermectin.
How Cats Get Infected with Parasites
Cats can acquire parasites through multiple routes:
- Ingesting contaminated food or water.
- Contact with infected animals.
- Flea and tick bites.
- Exposure to contaminated soil, grass, or feces.
Symptoms of Parasitic Infections in Cats
The symptoms of parasites vary but may include:
- Diarrhea and vomiting.
- Weight loss and malnutrition.
- Anemia and weakness.
- Scratching, hair loss, and skin irritation.
- Swollen abdomen (in severe worm infestations).
Diagnosis and Treatment of Parasites in Cats
Veterinarians diagnose parasitic infections through:
- Fecal tests – Identifies intestinal parasites.
- Skin scrapings – Detects mange mites.
- Blood tests – Identifies blood parasites like heartworms.
- Physical examination – Checks for fleas, ticks, and lice.
Treatment options include:
- Dewormers (anthelmintics) for internal parasites.
- Topical or oral flea and tick preventatives.
- Antiprotozoal medications for protozoan infections.
Prevention of Parasitic Infections in Cats
Prevention is the best way to keep cats parasite-free. Effective methods include:
- Routine deworming and vet check-ups.
- Monthly flea and tick prevention.
- Keeping litter boxes and bedding clean.
- Avoiding raw food diets and outdoor hunting.
Conclusion
Parasites pose serious health risks to cats and their owners. Understanding the types of parasites, their symptoms, prevention, and treatment is crucial for feline health. Regular veterinary visits and preventive care ensure a long and healthy life for our beloved feline companions.