Carp edema virus and koi herpesvirus were the most prevalent viral pathogens of the Czech common carp (Cyprinus carpio) in 2020

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027162%3A_____%2F21%3AN0000186" target="_blank" >RIV/00027162:_____/21:N0000186 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.delegate-reg.co.uk/eafp-2021/" target="_blank" >https://www.delegate-reg.co.uk/eafp-2021/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Carp edema virus and koi herpesvirus were the most prevalent viral pathogens of the Czech common carp (Cyprinus carpio) in 2020

Popis výsledku v původním jazyce

20th International Conference on Diseases of Fish and Shellfish, 20-23. 9. 2021. On-line. Common carp (Cyprinus carpio) is the most important fish species farmed in the Czech Republic, with the annual production of circa 20 000 tonnes. Infectious diseases decrease the profitability of the carp aquaculture, with a notifiable disease – koi herpesvirus (KHV) disease, and an emerging disease – carp edema virus (CEV) disease, causing the largest losses in the last few years. Methodology: Samples were obtained by the State Veterinary Administration during KHV surveillance program (556 samples from 96 locations) or directly from common carp farmers or koi carp breeders who reported clinical signs of a disease (81 samples from 28 locations). The gill and internal organ tissue was pooled, homogenised and the total DNA and viral RNA were extracted. Presence of KHV, CEV and carp sprivivirus (SVCV) was confirmed using real-time PCR. Partial P4a gene sequences of detected CEV isolates were obtained via Sanger sequencing. Results: In total, four locations were confirmed KHV positive and five ponds were depopulated, with 252.5 tonnes of fish euthanized due to control measures. CEV was diagnosed in six locations, of which four represent the common carp farmers and two koi carp breeders. Clinical signs in these cases varied from asymptomatic (two locations) to koi-sleepy-disease-like symptoms in both of the koi breeders to a 100% mortality rate in one of the common carp farms. Phylogenetically, two of the established CEV genogroups were detected, namely genogroup I in common carp and genogroup IIa in koi. SVCV was detected in one location, without the presence of any clinical or patho-anatomical signs. None of the samples showed co-infection of viral pathogens. Conclusions: Viral diseases still pose a threat to the carp aquaculture in the Czech Republic. Besides the direct losses via mortalities and decreased weight gains, mandatory control measures against the spread of KHV decrease the profitability even further.

Název v anglickém jazyce

Carp edema virus and koi herpesvirus were the most prevalent viral pathogens of the Czech common carp (Cyprinus carpio) in 2020

Popis výsledku anglicky

20th International Conference on Diseases of Fish and Shellfish, 20-23. 9. 2021. On-line. Common carp (Cyprinus carpio) is the most important fish species farmed in the Czech Republic, with the annual production of circa 20 000 tonnes. Infectious diseases decrease the profitability of the carp aquaculture, with a notifiable disease – koi herpesvirus (KHV) disease, and an emerging disease – carp edema virus (CEV) disease, causing the largest losses in the last few years. Methodology: Samples were obtained by the State Veterinary Administration during KHV surveillance program (556 samples from 96 locations) or directly from common carp farmers or koi carp breeders who reported clinical signs of a disease (81 samples from 28 locations). The gill and internal organ tissue was pooled, homogenised and the total DNA and viral RNA were extracted. Presence of KHV, CEV and carp sprivivirus (SVCV) was confirmed using real-time PCR. Partial P4a gene sequences of detected CEV isolates were obtained via Sanger sequencing. Results: In total, four locations were confirmed KHV positive and five ponds were depopulated, with 252.5 tonnes of fish euthanized due to control measures. CEV was diagnosed in six locations, of which four represent the common carp farmers and two koi carp breeders. Clinical signs in these cases varied from asymptomatic (two locations) to koi-sleepy-disease-like symptoms in both of the koi breeders to a 100% mortality rate in one of the common carp farms. Phylogenetically, two of the established CEV genogroups were detected, namely genogroup I in common carp and genogroup IIa in koi. SVCV was detected in one location, without the presence of any clinical or patho-anatomical signs. None of the samples showed co-infection of viral pathogens. Conclusions: Viral diseases still pose a threat to the carp aquaculture in the Czech Republic. Besides the direct losses via mortalities and decreased weight gains, mandatory control measures against the spread of KHV decrease the profitability even further.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10607 - Virology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů