ToxocariasisToxocaraToxocara canisLarva Migrans, VisceralAntibodies, HelminthEye Infections, ParasiticCentral Nervous System HelminthiasisLarva MigransAscariasisAntigens, HelminthSeroepidemiologic StudiesThiabendazoleEosinophiliaPicaDisease SusceptibilityChild, AbandonedEnzyme-Linked Immunosorbent AssayAnthelminticsAlbendazoleAscaris lumbricoidesChoroid HemorrhageFood ParasitologyDogsArgentinaImmunoglobulin GGenetic Predisposition to Disease