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Parasitic ulcerative ventriculitis in mallards (Anas platyrhynchos)
1Veterinary Research Laboratory, Montana State University, Bozeman 59717.
Journal of Wildlife Diseases
|October 1, 1987
Summary
Natural infections of Streptocara nematodes caused severe illness and death in mallard ducks at Red Rock Lakes National Refuge. The study identified Streptocara crassicauda and Streptocara incognita as the causative agents in affected waterfowl.
Area of Science:
- Veterinary Parasitology
- Avian Pathology
- Wildlife Health
Background:
- Nematode infections can significantly impact wild bird populations.
- Gastrointestinal parasites are a common cause of morbidity and mortality in waterfowl.
- Understanding specific parasite burdens is crucial for wildlife disease management.
Purpose of the Study:
- To report the diagnosis of natural infections of Streptocara nematodes in mallards.
- To document the pathological effects and clinical outcomes associated with these infections.
- To identify the specific species of Streptocara involved.
Main Methods:
- Necropsy of four infected mallard ducks (Anas platyrhynchos).
- Identification of nematode parasites.
- Histopathological examination of lesions in the gizzard and proventriculus.
Main Results:
- Natural infections of Streptocara crassicauda and Streptocara incognita were diagnosed in four mallards.
- Lesions were observed at the gizzard-proventriculus junction.
- Infections led to debilitation, emaciation, and death in the affected birds.
Conclusions:
- Streptocara crassicauda and Streptocara incognita can cause severe disease in mallards.
- Gastrointestinal lesions associated with these nematodes are detrimental to waterfowl health.
- These findings highlight the importance of parasite surveillance in wild bird populations.