This experiment were defined the protective ability of cultured
tilapia(Oreochromis nilotica) induced by bacterial vaccine coorperate
with adjuvant and immunostimulant agents.Three kinds of probiotic
bacteria will also used to this study , including Rhodobacter
sphaeroides, Bacillus subtilis ,Micrococcus luteus ,etc. Challanged test
will take up after dietary experimental fish with eel diet mixed with
vaccine and probiotic bacterial strain for 15days.