AscariasisAscaris lumbricoidesAscarisAscaridiaAnthelminticsPrince Edward IslandBiliary Tract DiseasesIntestinal Diseases, ParasiticParasite Egg CountSenna ExtractHookworm InfectionsHelminthiasisAscaris suumMebendazoleCholangiopancreatography, Magnetic ResonanceToxocara canisBile Duct DiseasesAntibodies, HelminthParasitic DiseasesAppendixSphincterotomy, EndoscopicTrichuriasisAlbendazoleMalabsorption SyndromesAntigens, HelminthFecesCholangitisIntestinal ObstructionCholangiopancreatography, Endoscopic Retrograde