Symptoms of covert toxocariasis include abdominal pain, a cough and headache.Visceral larva migransVisceral larva migrans develops when large numbers of parasites spread through different organs of the body, such as the lungs, liver and heart.The main symptoms of visceral larva migrans are fever, abdominal pain and shortness of breath.Ocular larva migransOcular larva migrans is the least common bu