CSAD and infection: In the present study, mRNA transcript levels of rate-limiting enzymes of taurine metabolism, i.e., CDO, CSD, and AST, were attenuation by V. parahaemolyticus (PD-2) infection, while taurine supplementation could induce CDO and CSD expression, except AST, to enhance shrimp (P. vannamei) survival against V. parahaemolyticus (PD-2) infection (Fig. 5).