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Visceral Larva Migrans
Medical Questions » Visceral Larva Migrans
| Name: Visceral Larva Migrans |
| Also known as: Ocular Larva Migrans |
| Internal infestation by the larvae of a roundworm (nematode). |
Causes of Visceral Larva Migrans
Dogs infected by the roundworm (Toxocara cants) pass worm eggs out with their faeces to contaminate the soil. Eggs swallowed by humans (often children) hatch into larvae which penetrate through the gut wall into the bloodstream by which they are carried to a variety of organs, particularly the lungs, liver, brain and eye (ocular larva migrans). |
Symptoms of Visceral Larva Migrans
Very variable, depending on which organ the larvae are carried to, and the number of larvae present. Usually include fever, tiredness, loss of appetite and weight loss. Organ specific symptoms include cough, wheeze, rash, large liver and spleen, visual disturbances, seizures and behavioral disorders. |
Tests for Visceral Larva Migrans
There is a specific blood test to detect the presence of the larvae, and other blood tests show significant reactive changes. Chest X-rays may show lung inflammation. Masses of larvae in the eye can be seen by looking through the pupil with an ophthalmoscope (magnifying light). |
Treatment for Visceral Larva Migrans
Medication is available to destroy the larvae, and steroids are used to reduce inflammation.
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Complications of Visceral Larva Migrans of its treatment
Heart infestation and pneumonia may lead to death. |
Likely Outcome of Visceral Larva Migrans
Larvae cannot develop into worms in humans, and die off naturally after several months, but permanent organ damage may occur. Treatment of eye disease is unsatisfactory. |
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