Histopathological findings in wild Nutrias (Myocastor coypus) with Capillaria hepatica infection

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  • HONG Il-Hwa
    Institute of Animal Medicine, Gyeongsang National University, Jinju, Republic of Korea Department of Veterinary Pathology, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • KANG Sun-Young
    Laboratory of Veterinary Surgery and Behavior, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • KIM Jong-Hyun
    Institute of Animal Medicine, Gyeongsang National University, Jinju, Republic of Korea Department of Veterinary Parasitology, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • SEOK Seong-Hoon
    Laboratory of Veterinary Surgery and Behavior, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • LEE Seong-Kyu
    Nakdong River Basin Environmental Office, Ministry of Environment, Changwon, Republic of Korea
  • HONG Seong-Jin
    Nakdong River Basin Environmental Office, Ministry of Environment, Changwon, Republic of Korea
  • LEE Seung-Yong
    Laboratory of Veterinary Surgery and Behavior, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • PARK Se-Jin
    Laboratory of Veterinary Surgery and Behavior, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • KONG Joo-Yeon
    Department of Veterinary Pathology, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
  • YEON Seong-Chan
    Institute of Animal Medicine, Gyeongsang National University, Jinju, Republic of Korea Laboratory of Veterinary Surgery and Behavior, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea

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  • Histopathological findings in wild Nutrias (<i>Myocastor coypus</i>) with <i>Capillaria hepatica</i> infection

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<p>Capillaria hepatica is a zoonotic nematode that uses rodents and other mammals as hosts, especially rats and mice, and causes hepatic granuloma and eventually fibrosis/cirrhosis. However, C. hepatica infection in nutria, a large semiaquatic rodent, has rarely been reported, and histopathologic features of the infection have not been described in detail. We conducted necropsy on 36 wild nutrias. Some animals were found to have milky spots, parasitic eggs and worms within hepatic microgranuloma involving central calcification with cell debris, macrophages, eosinophils and multinucleated giant cells (MGCs). Interestingly, the eggs were closely surrounded by MGCs and appeared to be destroyed without inducing further chronic changes. Based on microscopical examination, C. hepatica infection was diagnosed, and we describe its histopathological characteristics in wild nutrias.</p>

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