ToxocariasisToxocaraToxocara canisAbdominal PainLarva Migrans, VisceralAntibodies, HelminthEye Infections, ParasiticCentral Nervous System HelminthiasisLarva MigransAscariasisPainAntigens, HelminthEosinophiliaSeroepidemiologic StudiesThiabendazolePicaChild, AbandonedEnzyme-Linked Immunosorbent AssayAnthelminticsAlbendazoleChronic PainPain ManagementAbdomen, AcuteAscaris lumbricoidesChoroid HemorrhageFood ParasitologyPain ThresholdPain, PostoperativeDogsPain MeasurementBack PainPain, IntractableLow Back PainArgentinaImmunoglobulin G