Toxocara canisToxocaraToxocariasisLarva Migrans, VisceralAscariasisStrongyloideaAscaris suumAncylostomaAntibodies, HelminthLarvaEhrlichia canisEye Infections, ParasiticAntigens, HelminthCentral Nervous System HelminthiasisDog DiseasesDogsEosinophiliaHelminthiasis, AnimalParasite Egg CountParasitic Diseases, AnimalDirofilaria immitisSeroepidemiologic StudiesIntestinal Diseases, ParasiticAlbendazoleAnthelminticsZoonosesDNA, HelminthHelminth ProteinsSoil