A parasitic infection caused by toxocara. Humans are infected by the larvae of toxocara canis and toxocara cati from dogs and cats respectively. Most cases remain asymptomatic. The parasites may affect the eye, causing diminished vision, or other major organs, causing hepatomegaly, eosinophilia, wheezing, and coughing.
Infection by round worms of the genus toxocara, usually found in wild and domesticated cats and dogs and foxes, except for the larvae, which may produce visceral and ocular larva migrans in man.