Influence of O-antigen Aeromonas salmonicida on non-specific and specific immune responses in Siberian sturgeon, Acipenser baeri Brandt

Abstract

Investigations were carried out on Siberian sturgeon (A. baeri Brandt) fry rearing in recirculation systems conditions. Outer membrane antigen of A. salmonicida was administered in the single intra peritoneal injection . Test of NBT reduction (both cytochemical and spectrophotometric assay), lisozyme activity, phagocytic ability of PMN neutrophils, levels of g- globulins and total protein, titres of natural and specific antibodies were determined during six weeks after injection. The results obtained showed significant elevation of the cellular and humoral response indices; production of specific antibodies began in the first week yet.