Toxocara canisToxocaraToxocariasisToxoplasmaLarva Migrans, VisceralAntibodies, HelminthAscariasisEhrlichia canisToxoplasmosisEye Infections, ParasiticAntigens, HelminthCentral Nervous System HelminthiasisDog DiseasesToxoplasmosis, AnimalDogsEosinophiliaHelminthiasis, AnimalParasite Egg CountSeroepidemiologic StudiesParasitic Diseases, AnimalIntestinal Diseases, ParasiticLarvaAscaris suumDirofilaria immitisAlbendazoleZoonosesAnthelminticsDNA, HelminthSoilHelminth ProteinsEnzyme-Linked Immunosorbent Assay