Susceptibility of pike Esox lucius to a panel of Ranavirus isolates

Jensen, Britt Bang, Ersboll, Annette Kjaer, and Ariel, Ellen (2009) Susceptibility of pike Esox lucius to a panel of Ranavirus isolates. Diseases of Aquatic Organisms, 83 (3). pp. 169-179.

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In order to study the pathogenicity of ranaviruses to a wild European freshwater fish species, pike Esox lucius fry were challenged with the following Ranavirus isolates: epizootic haematopoietic necrosis virus (EHNV), European sheatfish virus (ESV), European catfish virus (ECV), pike-perch iridovirus (PPIV), New Zealand eel virus (NZeelV) and frog virus 3 (FV3). The fry were infected using bath challenge at 12 and 22°C. Significant mortalities were observed at 12°C for EHNV, ESV, PPIV and NZeelV. Background mortality was too high in the experiments performed at 22°C for any conclusions about viral pathogenicity at this temperature to be drawn. Viruses could be re-isolated from samples from all challenged groups, and their presence in infected tissue was demonstrated using immunohistochemistry. The findings suggest that pike fry are susceptible to EHNV, ESV, PPIV and NZeelV and can be a vector for ECV and FV3. Statistical analysis of the factors associated with positive virus re-isolation showed that the number of fish in the sample influenced the outcome of virus re-isolation. Moreover, the likelihood of positive virus re-isolation significantly differed among the 6 viral isolates. The temperature from where the sample was taken and the number of days after infection were not associated with the probability of a positive virus re-isolation.

Item ID: 10636
Item Type: Article (Research - C1)
ISSN: 1616-1580
Keywords: Ranavirus; pike; epizootic haematopoietic necrosis virus; European sheatfish virus; European catfish virus; pike-perch iridovirus; New Zealand eel virus; frog virus 3
Date Deposited: 14 Apr 2010 23:43
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070712 Veterinary Virology @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 50%
92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920109 Infectious Diseases @ 50%
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