Syngamiasis in juvenile American robins (Turdus migratorius), with a note on the prevalence of other fecal parasites.

Of 105 juvenile American robins (Turdus migratorius L.) examined for fecal parasites, 77.1% were infected with one or more species of endoparasite. Syngamus sp. was the most commonly encountered parasite, found in 57.1% of the birds. There was a significant association between the presence of Syngamus sp. eggs in feces and signs of respiratory-tract disease. A single oral dose of fenbendazole (100 mg/kg of body weight) eliminated Syngamus sp. infection from all of 18 birds treated, yet 10 of 16 untreated controls apparently were "self-cured" over the 12-day period of observation.