Fleas in cats
Also known as Flea infestation, Ctenocephalides felis.
The most common external parasite in cats, indoor cats included. As well as itching, fleas transmit tapeworms and bacteria, and in kittens they can cause anaemia.
- System
- Parasites
- Is it urgent?
- Not usually
- Spreads to other cats
- Yes
- Spreads to people
- Very rarely
- Typical cost in Spain
- Parasite treatment, €8–20 a month per animal.
They pass to other animals and bite people; through fleas, a cat can transmit Bartonella (cat scratch disease).
Symptoms
- Scratching and licking
- Black specks in the coat
- Small scabs
- Pale gums in heavily infested kittens
- Rice-like grains near the anus (tapeworm)
Causes
Fleas brought in by other animals or on clothing; most of the life cycle takes place in the home, not on the cat.
How it is diagnosed
A flea comb over damp paper.
Treatment
A cat-specific parasite treatment for every animal, and cleaning the home for several weeks.
No doses, on purpose: any medicine must be prescribed by your vet for your cat.
Prognosis
Very good.
Prevention
Parasite treatment all year round. Never dog spot-ons: many contain permethrin, which is toxic to cats.
Frequently asked questions
Are fleas contagious?
To other cats: yes. To people: very rarely. They pass to other animals and bite people; through fleas, a cat can transmit Bartonella (cat scratch disease).
Can fleas be cured?
Very good. A cat-specific parasite treatment for every animal, and cleaning the home for several weeks.
How much does it cost to treat fleas?
As a guide for Spain in 2026: Parasite treatment, €8–20 a month per animal. Prices vary a lot between clinics and cities, and out-of-hours emergencies cost more.
How can fleas be prevented?
Parasite treatment all year round. Never dog spot-ons: many contain permethrin, which is toxic to cats.
More in parasites
Educational content from Michipedia. It does not replace diagnosis or treatment by a vet: if you have any doubt about your cat's health, ask. Costs are a guide for Spain in 2026.