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"Rash" Skin Disease of Rainbow Trout

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Title: "Rash" Skin Disease of Rainbow Trout
Other Titles: ニジマスの皮膚炎「ラッシュ」
Authors: Kfoury, Jose Roberto, Jr.1 Browse this author
Okamoto, Nobuaki2 Browse this author →KAKEN DB
Tanaka, Makoto3 Browse this author
Yoshimizu, Mamoru4 Browse this author →KAKEN DB
LaPatra, Scott E.5 Browse this author
Maita, Masashi6 Browse this author →KAKEN DB
Authors(alt): Kfoury, Jose Roberto1
岡本, 信明2
田中, 真3
吉水, 守4
LaPatra, Scott E.5
舞田, 正志6
Keywords: Rash
Skin disease
Rainbow trout
Issue Date: 15-Dec-1996
Publisher: 日本魚病学会
Journal Title: 魚病研究
Journal Title(alt): Fish pathology
Volume: 31
Issue: 4
Start Page: 197
End Page: 201
Publisher DOI: 10.3147/jsfp.31.197
Abstract: "Rash", a subchronic, debilitating and non-fatal inflammatory skin disease has been found in cultured rainbow trout (Oncorhynchus mykiss) in several areas of Japan over the past five years. This condition was observed from small fish (11cm in body length) to mature-size animals, however, most of the affected fish were market size (in Japan, 20cm/120g). Morbidity sometimes reaches as high as 48% and causes a significant economic impact, since those fish loose commercial value. A self-limited clinical course and healing of the lesion could be observed after 6 to 8 weeks. "Rash" signs included the presence of bright red, non-raised, ulcerated or not, defined to petechial scattered lesions on the ventral and/or lateral surfaces of the fish. Histopathological features included a subchronic focal to non-focal, non-suppurative dermatitis with various degrees of ulceration and an extensive mononuclear inflammatory infiltration. "Rash" etiology still remains unknown.
本病は, 亜慢性, 非致死性の炎症性皮膚炎で, 約5年前からニジマス主産地で見られるようになった。本病は, 幼魚から成魚にまで見られているが, 最も発病率の高いのは120g前後の市場サイズの魚である。出荷時の被害率が48%に及んだことがある。本病の病因は未だ不明である。本病は自然治癒する。罹病魚は腹部や体側に, 発赤や潰瘍, 広範囲にわたる点状出血を呈する。病理組織では, 亜慢性の非化膿性皮膚炎像を示し, 広範囲にわたる単核性細胞の炎症性浸潤を特徴とする。本病を「ラッシュ」と仮称する。
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 吉水 守

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