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KMID : 1094020090260030306
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Journal of Veterinary Clinics
2009 Volume.26 No. 3 p.306 ~ p.310
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Mass Mortality of Adult Koi Carp(Cyprinus carpio) in the Early Winter by Aeromonas hydrophila Infection
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Park Seong-Bin
Nho Seong-Won
Jang Ho-Bin
Cha In-Seok
Rishikesh. S. Dalvi
Kim Young-Rim
Ha Mi-Ae
Jung Tae-Sung
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Abstract
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Mass mortality was occurred in adult koi carp(Cyprinus carpio) at a private pond near Samchunpo city in the early November, 2007. Its water temperature was and turbidity was very high. The fishes diseased were shown widely distributed hemorrhages, deep ulcerations on the whole body surface and severe erosions in the all fins. In necropsy, excess ascitic fluid was observed and spleen and kidney affected were enlarged. In microscopic observation, it was examined widely distributed severe dermal ulceration, multifocal gill lamella hyperplasia, severe fibrinous pericarditis, multifocal nephritis and hepatitis. The bacteria suspected were isolated using tryptone soya agar and identified as motile Aeromonas hydrophila as results of biochemical tests using API 20E and 20NE. According to previous reports, A. hydrophila infection were mainly occurred in fingerling at high temperature. However, this case exhibited that A. hydrophila infection can develop on adult koi carp even in the winter season.
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KEYWORD
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Aeromonas hydrophila, adult koi carp, mass mortality, winter
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