Pathological and microbiological features of Aeromonas salmonicida infection in the American eel (Anguilla rostrata).

DOI Web Site 1 Citations
  • NOGA Edward J.
    Department of Companion Animal and Special Species Medicine,College of Veterinary Medicine, North Carolina State University
  • BERKHOFF Herman A.
    Department of Microbiology, Pathology and Parasitology,College of Veterinary Medicine, North Carolina State University

Bibliographic Information

Other Title
  • アメリカウナギのAeromonas salmonicida感染症の病理学的ならびに微生物学的特徴
  • アメリカウナギのAeromonas salmonicida感染症の病理学的ならびに微生物学的特徴〔英文〕
  • アメリカ ウナギ ノ Aeromonas salmonicida カンセンショ

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Abstract

An ulcerative skin disease which is very similar clinically to that reported in Japanese eel (Anguilla japonica) has caused morbidity in both wild and cultured populations of American eel (A. rostrata) in North Carolina, USA. Lesions appear to begin as localized, depigmented foci which spread to form large patches of necrotic skin up to 16 cm2 in area. The depigmented patches detach at the dermo-epidermal junction, forming large ulcers that expose underlying muscle. The infection commonly affects the head, producing cranial swelling and corneal edema. A mild to severe, primarily mononuclear infiltrate is seen, most prominently in large ulcers. Many lesions had extensive collagen deposition, which contributed to the tissue swelling. Culture of skin lesions in various stages of development revealed the consistent presence of bacterial isolates that were biochemically and immunologically identified as Aeromonas salmonicida. This agent was the predominant organism by colony type in 17 of 20 skin cultures and usually appeared to constitute over 90% of the colonies present. Kidney samples were free of infection.

Journal

  • Fish Pathology

    Fish Pathology 25 (3), 127-132, 1990

    The Japanese Society of Fish Pathology

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