Melamine and curcumin enriched diets modulate the haemato-immune response, growth performance, oxidative stress, disease resistance, and cytokine production in oreochromis niloticus.

•Melamine (MEL) depleted immune and antioxidant indicators in O. niloticus.•MEL markedly downregulated splenic IL-1β and TNF-α gene expression.•Retarded growth was obvious in the O. niloticus fed MEL containing diet.•MEL significantly reduced crude lipid content of O. niloticus body.•Curcumin addition to the O. niloticus diet significantly reduced MEL adverse impacts