Pathology: Myocarditis by nematodes infection, presumably Sarconema eurycerca, in a wild whooper swan (Cygnus cygnus) in Korea

  • WOO Gye-Hyeong
    Laboratory of Pathology, Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service
  • JEAN Young-Hwa
    Laboratory of Pathology, Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service
  • BAK Eun-Jung
    Hospital Specialization Research Center, College of Medicine, Hallym University
  • KANG Seungwon
    Laboratory of Parasitology, Bacteriology Division, National Veterinary Research and Quarantine Service
  • ROH In-Soon
    Laboratory of Pathology, Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service
  • LEE Kyung-Hyun
    Laboratory of Pathology, Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service
  • HWANG Eui-Kyung
    Department of Animal Science, College of Life Science and Natural Resources, Sangji University
  • LEE O-Soo
    Laboratory of Pathology, Animal Disease Diagnostic Center, National Veterinary Research and Quarantine Service

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  • Myocarditis by Nematodes Infection, Presumably Sarconema eurycerca, in a wild whooper swan (Cygnus cygnus) in Korea

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A dead whooper swan was found in an area of cropland near a stream and was submitted to the National Veterinary Research and Quarantine Service (NVRQS) in Korea. The affected animal was in relatively good condition. Grossly, the heart was enlarged and had pale and dark red stripes. A white, elongate parasite was seen on the cut surface of the heart. Histopathologically, severe lymphohistiocytic inflammation, myocardial necrosis, many adult heart worms and microfilariae were observed in the myocardium. Hemorrhage, lymphocytic inflammation, mineralization, and myocardial degeneration were also seen around the adult worms. No bacteria or viruses were isolated from the affected bird. The pathological findings indicate that the whooper swan was infected with nematodes, presumably Sarconema eurycerca, resulting in non-suppurative myocarditis.<br>

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