title: Development of an antibody ELISA for potency testing of furunculosis (Aeromonas salmonicida subsp salmonicida) vaccines in Atlantic salmon (Salmo salar L).
abstract: The study was conducted in Atlantic salmon to establish the initial and basic scientific documentation for an alternative batch potency test for salmon furuculosis vaccines. We assessed the antibody response development for Aeromonas salmonicida vaccines at different immunisation temperatures (3, 12 and 18 °C), by an enzyme-linked-immunosorbent assay (ELISA) 3, 6, 9 and 12 weeks post vaccination, and the correlation between antibody response and protection in cohabitation challenge experiments performed 6 and 12 weeks post vaccination. Fish immunised with a vaccine containing full antigen dose had a significant increase in antibody response after 252 day degrees and the measured values correlated well with protection after 500 day degrees. Fish vaccinated with a reduced antigen dose showed a significant lower antibody response than fish vaccinated with the full dose vaccine at all samplings, and showed a similar low relative percent survival (RPS) in the challenges. The results from this study indicate that an antibody ELISA can discriminate between vaccines of different antigen content and the method may replace challenge tests in batch potency testing of furunculosis vaccines in Atlantic salmon. An immunisation temperature of 12 °C and sampling after 6-9 weeks, seemed to be the most appropriate time for using antibody responses to confirm batch potency.
authors: Nord-Trondelag University College, Dept. of Health Science, Finn Christensensv 1, 7800 Namsos, Norway. anne.b.romstad@hint.no
authors: Anne Berit
authors: AB
authors: Romstad
authors: Liv Jorun
authors: LJ
authors: Reitan
authors: Paul
authors: P
authors: Midtlyng
authors: Kjersti
authors: K
authors: Gravningen
authors: Oystein
authors: O
authors: Evensen
mesh_terms: D048409:Aeromonas salmonicida / Q000276:immunology*; D000818:Animals; D000907:Antibodies, Bacterial / Q000737:chemistry* / Q000276:immunology; D001428:Bacterial Vaccines / Q000737:chemistry / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005393:Fish Diseases / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control; D005667:Furunculosis / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control / Q000662:veterinary; D020317:Salmo salar / Q000276:immunology* / Q000382:microbiology
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines