Immune Response and Antibody Characterization of the Channel Catfish (Ictalurus Punctatus) to a Naturally Pathogenic Bacterium and Virus

Innoculation of channel catfish with Chondrococcus columnaris and channel catfish virus resulted in a rapid primary response to both antigens. The secondary response to the bacterium was rapid but weaker than that often seen in warmblooded animals, whereas the secondary response to virus was weak, and of relatively short duration.