The effects of Excoecaria agallocha extract on growth, innate immune responses, and resistance to Vibrio parahaemolyticus in white shrimp, Litopenaeus vannamei

Litopenaeus vannamei Excoecaria agallocha extract immune response Vibrio parahaemolyticus

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June 25, 2024

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The purpose of this study is to determine the effects of supplementary Excoecaria agallocha extract (EAE) on growth performance, innate immune responses, and resistance to Vibrio parahaemolyticus in white shrimp, Litopenaeus vannamei. Shrimp were separated into four groups, with each group fed diets containing different concentrations of 0 (control), 20 (EAE20), 30 (EAE30), and 40 (EAE40) g kg-1. The results indicated that shrimp fed diet containing different concentrations of EAE did not affect growth performance and survival rate for a 56-day feeding trial. However, shrimp fed a diet containing EAE20 showed increased HC, GC, THC, PO activity, and Phagocytic rate on days 1, 3, 7, 14, and 28. Moreover, supplemented different concentrations of EAE in the diets showed increased resistance to V. parahaemolyticus infection of white shrimp after 56 days of feeding. The results indicate that EAE could be applied to shrimp feed to enhance immune response and resistance to bacterial disease.