Human toxocariasis is the disease caused by infection of zoonotic roundworms Toxocara canis and T. cati, whose definitive hosts are dogs and cats, respectively. Humans become infected by ingesting either embryonated eggs from soil or raw vegetables. Toxocara larval migration in the body can cause four clinical syndromes, namely visceral larva migrans, ocular larva migrans, and covert/common toxocariasis. These are frequently associated with fever, abdominal pain, cough, wheeze, and hepatomegaly. Ocular larva migrans can lead to visual loss.
