Detection of <i>Flavobacterium psychrophilum</i> in Adult Chum Salmon and Prevention of Vertical Transmission in a Hatchery

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  • シロサケ回帰親魚の細菌性冷水病原因菌<i>Flavobacterium psychrophilum</i>の保有とふ化場での垂直感染の防除
  • シロサケ回帰親魚の細菌性冷水病原因菌Flavobacterium psychrophilumの保有とふ化場での垂直感染の防除
  • シロサケ カイキ シンギョ ノ サイキンセイ ヒヤミズビョウ ゲンインキン Flavobacterium psychrophilum ノ ホユウ ト フカジョウ デ ノ スイチョク カンセン ノ ボウジョ

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Abstract

<p>Flavobacterium psychrophilum, which causes bacterial cold-water disease, was detected in the ovarian fluid of female chum salmon used for mating in a hatchery in Iwate Prefecture in 2018. ​The detection rate of F. psychrophilium in chum salmon was 0.0–91.7% in individuals captured from a river; 0.0–100.0% in individuals captured from the sea and stocked in fresh water before testing; and 21.4% in individuals captured from the sea and not stocked in fresh water. ​Pre-water-hardening disinfection of fertilized eggs was performed for 21,165 thousand eggs in the hatchery, where the average eyed-egg ratio was 92.4%. ​Intra-ovum infection was not detected in the disinfected eggs, but 23.3% of non-disinfected eggs became infected.</p>

Journal

  • Fish Pathology

    Fish Pathology 55 (2), 42-45, 2020-06-15

    The Japanese Society of Fish Pathology

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