The effect of oral immunostimulants on the immune response in
aquatic species is strongly associated with the dose and duration of
application. The present study aimed to investigate the effects of
dietary supplementation of guava leaves on the growth, immune
parameters, and cytokine gene expression of L. rohita, and its susceptibility
to A. hydrophila infection. We also aimed to explore
guava's potential as a feed additive in aquaculture.