AscaridoideaAscaridida InfectionsRaccoonsAscaris suumAscariasisAscaridiasisLarva MigransToxocaraCentral Nervous System HelminthiasisAscarisAscaris lumbricoidesAscaridiaProcyonidaeToxocariasisHelminthiasis, AnimalNematode InfectionsParasite Egg CountToxocara canisEgg YolkPetsAnthelminticsHelminthsDNA, HelminthParasitic Diseases, AnimalNematodaOvumIntestinal Diseases, ParasiticEgg ProteinsAntibodies, HelminthEgg ShellEgg WhiteCaenorhabditis elegansFecesEgg HypersensitivityOvipositionFertilizationSperm-Ovum InteractionsZygoteEgg Proteins, DietaryVitelline MembraneSpermatozoaOocytesSchistosoma mansoniNesting BehaviorEchinodermataChickensOogenesisClutch SizeOviparityUrochordataReproductionZona PellucidaSchistosomiasis mansoniHymenopteraParthenogenesisXenopusLarvaXenopus laevisEmbryo, NonmammalianStarfish