Figure 3From: Antigen dose and humoral immune response correspond with protection for inactivated infectious pancreatic necrosis virus vaccines in Atlantic salmon (Salmo salar L)Antibody levels detected by ELISA. Four weeks post vaccination (wpv) up to 8 wpc, which is equivalent to day of challenge, shows antibody responses generated during the immune induction period. Days after 8 wpc show antibody levels after challenge. There is a marked decline in circulating antibody levels post challenge in the HiAg and LoAg group. The control group has raised levels of antibodies by 21 dpc as a consequence of the challenge virus.Back to article page