Toxocariasis of the central nervous system: With report of two cases.

Toxocariasis is a parasitic infection caused by the roundworms Toxocara canis or Toxocara cati, mostly due to accidental ingestion of embryonated eggs. Clinical manifestations vary and are classified according to the organs affected. Central nervous system involvement is an unusual complication. Here, we report two cases with neurological manifestations, in which there was cerebrospinal fluid (CSF) eosinophilia with marked blood eosinophilia and a positive serology for Toxocara both in serum and CSF. Improvement of signs and symptoms after specific treatment was observed in the two cases.