Protection of gilthead seabream against pasteurellosis at the larval stages

We present here the first evidence of the achievement of an effective prote ction against pasteurellosis of 50 mg gilthead seabream using a toxoid-enri ched whole-cell bacterin, commerzialized as DI vaccine, by dip or bath proc edures. The relative percent survival (RPS) values were slightly higher by the dip method (84-90) than by prolonged bath (77-80). On the basis of thes e results, we recommend a first immunization when larvae are around 50 mg a nd a booster immunization when fish reach 2 g body weight.