Differences in the antibody response and survival of genetically different varieties of common carp (Cyprinus carpio L.) vaccinated with a commercial Aeromonas salmonicida/A. hydrophila vaccine and challenged with A. hydrophila |
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Authors: | Zsigmond Jeney Tímea Rácz Kim D Thompson Saravanane Poobalane László Ardó Alexandra Adams and Galina Jeney |
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Institution: | (1) Research Institute for Fisheries, Aquaculture and Irrigation (HAKI), Anna liget 8, 5541 Szarvas, Hungary;(2) Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, Scotland, UK; |
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Abstract: | Males of two strains of carp, wild Duna (D), and inbred Szarvas 22 (22), were selected for high and low stress response. Two
purebreds of D and 22, from randomly chosen parents and four crosses, 22 × 22-L (low stress response), 22 × 22-H (high stress
response), 22 × D-L (low stress response) and 22 × D-H (high stress response) from selected stress response parents were produced
and vaccinated with a commercial Aeromonas salmonicida/Aeromonas hydrophila vaccine and their circulating antibody response evaluated 1, 3, 5, and 7 weeks post-vaccination by ELISA. Significantly higher
titres of circulatory antibodies against A. hydrophila were found in the families 22 and cross 22 × 22-L compared to other groups. The development of circulatory antibodies against
A. hydrophila in all crosses having at least one D parent was low and remained low throughout the experiment. The level of circulatory
antibodies against atypical A. salmonicida in the inbred strain increased following a booster vaccination with the highest values measured in inbred strain 22 and cross
22 × 22 L. The different varieties of carp had different levels of survival against experimental challenge with A. hydrophila. The greatest survival was obtained in strain 22 and cross 22 × 22-L, while ~90% of D wild carp and cross 22 × D (independent
of their stress response) died. Survival results correlated well with the antibody response of the different groups: 22 and
22 × 22-L had the highest antibody titres against A. hydrophila and the greatest level of survival. |
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