Abstract
Two concentrations of dry leaves in powder (5 and 10 % in feed) of Terminalia catappa (Combretaceae) were embedded in a fish feed to prevent and limit the impact of Streptococcus agalactiae in juveniles of Oreochromis niloticus. Fish were fed with this enriched feed for 15 days before challenge disease and until 21 days after challenge. The cumulative incidence of disease and mortality were significantly reduced in treated fish compared to the controls. The relative percent survival (RPS) were 78% and 62%, respectively for 10 and 5% of leaves powder added in the feed. No negative impact on condition factor, weight gain and specific growth rate were observed in fish fed with dry green leaves of T. catappa.