We present a case of cerebral vasculitis and suspicious retinal vasculitis of a thirty-five- year old, HIV-negative woman. Toxocara canis is a ubiquitous parasite found worldwide. She can only complete lifecycle in dogs, and humans are accidental hosts. Among the neurological and neuropsychological disturbances produced by Toxocara infection, in humans, the most representative are meningitis, encephalitis, myelitis and cerebral vasculitis. Predominant symptoms were trembling and tingling in the left side of the body, tremor of the hands and weakness of the extremities, more to the left, fever and visual disturbance. MR imaging of the brain showed obliterative endarteritis to the left. Visual acuity was impaired, the optic nerve was swollen and macula was thickened. Antibodies to Toxocara canis were detected by ELISA test. Antiparasitic therapy with corticosteroids has led to the reduction of symptoms and clinical findings.

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