Toxocariasis is a rare infection caused by roundworm parasites. It's spread from animals to humans through contact with infected faeces. Roundworm parasites are most commonly found in cats, dogs and foxes, and usually affect young children.Human toxocariasis is caused by migration of the larvae of Toxocara canis (dog roundworm) and less frequently of T. cati (cat roundworm) through the human tissues. Toxocara are nematode parasites of animals.
If your eye is affected by toxocariasis, anthelmintics aren't used, but steroid medication (corticosteroids) may be required to suppress inflammation. Surgery may also be needed – for example, if you develop retinal detachment.In the Netherlands, about 599cases of Toxocara infection are reported in humans each year. Almost 13 % of the Netherlands population is infected with Toxocara.