Immunization of brook trout (Salvelinus fontinalis) against Aeromonas salmonicida: immunogenicity of virulent and avirulent isolates and protective ability of different antigens

摘要: Brook trout (Salvelinus fontinalis) passively immunized with antisera from rainbow (Salmo gairdneri) prepared against virulent or avirulent cultures of Aeromonas salmonicida were equally protected challenges concentrated suspensions (109 cells/mL) A. salmonicida. washed unwashed formalin-killed cells had mean humoral agglutinating antibody titers 14 (washed cells) and 205 (unwashed after 21 d. However, fish so not when exposed to a challenge. Trout inoculated crude extracellular material extracted culture supernatants agglutinin titer 122, resistant Keywords: salmonicida, Salvelinus fontinalis, Salmo gairdneri, immunization, antigens, material, protection, challenge, fishes