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Infectivity and pathogenicity of carp edema virus isolated in Japan to koi carp, common carp and goldfish

Journal of National Fisheries University Volume 71 Issue 3 Page 73-80
published_at 2023-03
71-3-73-80.pdf
[fulltext] 992 KB
Title
国内で検出されたCarp edema virusのニシキゴイ、マゴイおよびキンギョに対する感染性と病原性
Infectivity and pathogenicity of carp edema virus isolated in Japan to koi carp, common carp and goldfish
Abstract
Viral edema of carp (VEC) caused by the carp edema virus (CEV) causes economic losses for Japanese koi farms. In this study, we investigated the infectivity and pathogenicity of a domestic CEV isolate (genogroup IIa) in koi carp, common carp and goldfish. The challenge test consisted of 9 groups (n = 15):3 groups each of koi carp, common carp, and goldfish, at 15, 20 and 25℃. These groups were challenged with CEV (3.0×10^3 copies/µL) in duplicate. All koi carp died in the 15 and 20℃ groups, but all survived in the 25℃ group. The surviving koi carp in 25℃ groups showed high PCR positive rates of 66.7 and 73.3%, with VEC histopathological changes observed. For the common carp, 1 and 2 fish died in the 20℃ groups, but no deaths or VEC symptoms were observed in the 15 and 25℃ groups. In all common carp groups, PCR-positive fish were observed along with histopathological changes. For all goldfish groups, no deaths or VEC symptoms were observed. As with the common carp, PCR-positive fish were found in all goldfish groups, yet no VEC histopathological changes were detected. These results demonstrate infectivity of this CEV strain in koi carp, common carp, and goldfish, but low pathogenicity in common carp and goldfish.
Creators Matsumoto Akane
Creators Honda Kotaro
Creators Takahashi Hiroshi
Creators Kondo Masakazu
Creators Yasumoto Shinya
Source Identifiers [PISSN] 0370-9361
Creator Keywords
carp Cyprinus carpio goldfish carp edema virus viral edema of carp
Languages jpn
Resource Type departmental bulletin paper
Publishers National Fisheries University
Date Issued 2023-03
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361