Construction of Serological Diagnostic Chip for Pathogenic Vibrio in Fish
The antiserum samples of Paralichthys olivaceus were prepared respectively against 6 kinds of pathogenic vibrios,including Vibrio ichthyoenteri,V. anguillarum,V. parahaemolyticus,V. alginolyticus,V. fluvialis and V. harveyi. The outer membrane protein,flagellum protein,extracellular products and whole-cell bacterial protein of the strains were extracted and purified,then the immune reactions between the antigen components and the antiserum samples were analyzed,it was found that,for all Vibrios,the immune reaction between its antigen and its own antiserum was the strongest,besides,there were also cross-reactions in different extent between the antiserum with the antigen of other Vibrios. Further,the antigen components of the 6 strains were fixed on the chip carrier to form an antigen microarray so as to construct the serological diagnostic antigen chip,the method for interpreting detection results was determined by using monoclonal antibody 2D8 of IgM marked with horseradish peroxidase as the detection antibody;the antigen chip was applied to diagnose vibriosis in Paralichthys olivaceus and Scophthalmus maximus,and its accuracy was verified by ELISA. As a conclusion,a useful tool was provided for serological diagnosis of fish vibriosis.