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An experimental study on the effects of polymorphiasis in common eider ducklings
T Hollmén1, J T Lehtonen, S Sankari
1Faculty of Veterinary Medicine, Department of Basic Veterinary Sciences, University of Helsinki, Finland. tuula.hollmen@helsinki.fi
Journal of Wildlife Diseases
|September 9, 1999
Summary
Common eider ducklings infected with acanthocephalans showed slower weight gain and reduced serum protein levels. Parasitic infection impacted overall health, despite no mortality observed in the study.
Area of Science:
- Veterinary Parasitology
- Avian Health
- Wildlife Ecology
Background:
- Acanthocephalans are parasitic worms that can infect various animal hosts.
- Gammarus spp. are intermediate hosts for acanthocephalans, including Polymorphus minutus.
- Understanding host-parasite interactions is crucial for wildlife health management.
Purpose of the Study:
- To investigate the effects of experimental Polymorphus minutus infection on common eider ducklings.
- To assess the impact of parasitic infection on duckling growth and physiological parameters.
- To examine the pathological changes associated with acanthocephalan attachment in the duckling intestine.
Main Methods:
- Eight common eider ducklings were experimentally infected with Polymorphus minutus via infected Gammarus spp.
- A control group of seven ducklings received uninfected Gammarus spp.
- Serum biochemical parameters and parasite burden were analyzed after a 2-week study period.
Main Results:
- Infected ducklings exhibited slower weight gain compared to controls.
- Mean serum concentrations of total protein, albumin, beta-globulin, gamma-globulin, fructosamine, and creatine kinase were lower in infected ducklings.
- An average of 21 acanthocephalans were found attached to the posterior small intestine mucosa, eliciting a mixed inflammatory response.
Conclusions:
- Experimental Polymorphus minutus infection negatively impacts the growth and physiological status of common eider ducklings.
- Acanthocephalan infection can lead to reduced protein synthesis and altered metabolic markers.
- The findings highlight the pathogenic potential of acanthocephalans in avian hosts and the importance of intermediate host control.