Induction of infectious pancreatic necrosis (IPN) in covertly infected Atlantic salmon, Salmo salar L., post-smolts by stress exposure, by injection of IPN virus (IPNV) and by cohabitation

Atlantic salmon post-smolts were given an intraperitoneal (ip) injection of tissue homogenate of Atlantic salmon fry from an outbreak of infectious pancreatic necrosis (IPN), and cohabitants were given an ip injection of Earle's balanced salt solution (EBSS). Parallel treatment groups were expo...

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Veröffentlicht in:Journal of fish diseases. - 1998. - 21(1998), 3 vom: 01. Mai, Seite 193-204
1. Verfasser: Taksdal, T (VerfasserIn)
Weitere Verfasser: Ramstad, A, Stangeland, K, Dannevig, B H
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1998
Zugriff auf das übergeordnete Werk:Journal of fish diseases
Schlagworte:Journal Article
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245 1 0 |a Induction of infectious pancreatic necrosis (IPN) in covertly infected Atlantic salmon, Salmo salar L., post-smolts by stress exposure, by injection of IPN virus (IPNV) and by cohabitation 
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520 |a Atlantic salmon post-smolts were given an intraperitoneal (ip) injection of tissue homogenate of Atlantic salmon fry from an outbreak of infectious pancreatic necrosis (IPN), and cohabitants were given an ip injection of Earle's balanced salt solution (EBSS). Parallel treatment groups were exposed to recurrent episodes of environmental stress by water drainage twice a week. Fish injected with EBSS and non-injected fish were exposed to water drainage. The control fish were left untreated. Mortality due to IPN started 3 weeks after challenge in non-injected and EBSS-injected fish that had been exposed to water drainage. This showed that the fish used in the experiment were covertly infected with IPN virus (IPNV) prior to challenge, although no virus was detected in the fish sampled before the experiment. In fish that received an injection of IPNV, mortality started 5-6 days after challenge, regardless of the presence or absence of stress exposure. The EBSS-injected cohabitants started to die after an additional 5-6 days, also regardless of the presence or absence of stress exposure. The final cumulative mortality in the IPNV-injected fish was significantly lower than in the EBSS-injected cohabitants, thus suggesting that the secondary immune response after injection of IPNV provided more protection than the response after a water-borne infection. No disease outbreak was observed in the control fish 
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700 1 |a Ramstad, A  |e verfasserin  |4 aut 
700 1 |a Stangeland, K  |e verfasserin  |4 aut 
700 1 |a Dannevig, B H  |e verfasserin  |4 aut 
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