Skip to content

Parásitos

Thelazia (eyeworm)

Thin white worms that live on the surface of the eye and beneath the eyelids. They are transmitted by flies. They are spreading in the UK.

Moderate🐕 Dogs🐈 Cats Zoonosis

Symptoms to watch for

  • Watery eyes and discharge
  • Conjunctivitis, red eye
  • Discomfort: the animal rubs its eye
  • Sometimes the thin worms can be seen moving over the eye
  • Risk of corneal ulcers

Causes

The Thelazia worm, transmitted by flies that feed on eye secretions. Spreading in certain areas.

Diagnosis

The vet examines the eye and can often see the worms directly.

Treatment

Removal of the worms and a specific antiparasitic (some common antiparasitics cover it). Treatment of the associated conjunctivitis.

Prevention

An antiparasitic that covers Thelazia in at-risk areas, plus fly control.

When should you see the vet?

See the vet if there is persistent conjunctivitis with watery eyes, especially if you see something moving in the eye.

WetAi guides you and takes you to the vet; it does not diagnose.

Notice: this information is for general guidance and educational purposes only. It does NOT replace diagnosis or treatment by a registered veterinary surgeon. If you notice any symptoms, always consult a professional. Wallapets accepts no responsibility for the use of this information without veterinary supervision.