Phagocytic activity is a key indicator of enhanced non-specific
immune response. In the present study, the treatment groups fed
with andrographolide supplemented diet was found to be significantly
higher phagocytic activity compared to control with an
increasing trend in subsequent sampling periods. The present
findings support the report of C. carpio fed with oligodeoxynucleotides
supplemented diet [61]; greasy groupers (Epinephelus
tauvina) fed with herbal diet containing purified active component
of Ocimum sanctum, Withania somnifera, and Myristica fragrans [41],
chinese sucker (Myxocyprinus asiaticus) fed with traditional chinese
medicinal plant extracts [62] and also in C. auratus fed with azadirachtin
supplemented diet [22].