Table: Common Helminths of Poultry - Merck Veterinary Manual

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Common Helminths of Poultry

Parasite	Host	Intermediate Host or Life Cycle	Organ Infected	Pathogenicity
*Nematodes*
Amidostomum anseri	Duck, goose, pigeon	Direct	Gizzard	Severe
Ascaridia dissimilis	Turkey	Direct	Small intestine	Moderate
Ascaridia galli	Chicken, turkey, duck, quail	Direct	Small intestine	Moderate
Capillaria caudinflata	Chicken, turkey, duck, game birds, pigeon	Earthworms	Small intestine	Moderate to severe
Capillaria contorta	Chicken, turkey, duck, game birds	None or earthworms	Mouth, esophagus, crop	Severe
Capillaria obsignata	Chicken, turkey, goose, pigeon, quail	Direct	Small intestine, ceca	Severe
Cheilospirura hamulosa	Chicken, turkey, game birds	Grasshoppers, beetles	Gizzard	Moderate
Cyathostoma bronchialis	Turkey, duck	Direct or earthworm	Trachea	Severe
Cyrnea colini	Turkey, game birds	Cockroaches	Proventriculus	Mild
Dispharynx nasuta	Chicken, turkey, game birds, pigeon	Sowbugs	Proventriculus	Moderate to severe
Gongylonema ingluvicola	Chicken, game birds	Beetles, cockroaches	Crop, esophagus, proventriculus	Mild
Heterakis gallinarum	Chicken, turkey, duck, game birds	Direct	Ceca	Mild, but transmits agent of histomoniasis
Heterakis isolonche	Quail, duck, pheasant	Direct	Ceca	Severe
Ornithostrongylus quadriradiatus	Pigeon, dove	Direct	Small intestine	Severe
Oxyspirura mansoni	Chicken, turkey, guinea fowl, quail	Cockroaches	Eye	Moderate
Strongyloides avium	Chicken, turkey, quail, goose	Direct	Ceca	Moderate
Subulura brumpti	Chicken, turkey, duck, game birds	Earwigs, grasshoppers, beetles, cockroaches	Ceca	Mild
Syngamus trachea	Chicken, turkey, pheasant, quail	None or earthworm	Trachea	Severe
Tetrameres americana	Chicken, turkey, duck, game birds, pigeon	Grasshoppers, cockroaches	Proventriculus	Moderate to severe
Trichostrongylus tenuis	Chicken, turkey, duck, game birds, pigeon	Direct	Ceca	Severe
*Cestodes*
Choanotaenia infundibulum	Chicken	House flies	Upper intestine	Moderate
Davainea proglottina	Chicken	Slugs, snails	Duodenum	Severe
Metroliasthes lucida	Turkey	Grasshoppers	Intestine	Unknown
Raillietina cesticillus	Chicken	Beetles	Duodenum, jejunum	Mild
Raillietina echinobothrida	Chicken	Ants	Lower intestine	Severe, nodules
Raillietina tetragona	Chicken	Ants	Lower intestine	Severe

Merck Manual

Common Helminths of Poultry