In vivo administration of fucoidan from Turbinaria decurrens protects shrimps from white spot syndrome virus

Abstract

Fucoidan was extracted from the brown seaweed <em>Turbinaria decurrens</em> by hot water extraction and characterized with HPLC, FTIR, NMR and GPC to study the impact against the White Spot Syndrome Virus (WSSV), bacteria and fungi. Fucoidan was fed for shrimps along with the diet (before and after WSSV infection). In the end of the study, the survival percentage of shrimp was 51% (in the case of 5-8 g) and 97% (in the case of 12-15 g), respectively. Among the 10 bacterial pathogens and 7 fungal pathogens, fucoidan inhibited 2 bacterial pathogen such as <em>S. aureus </em>(0.26±0.02 mm) and<em> E. faecalis</em> (1.3±0.1 mm) and <em>A. Niger </em>(0.84 ± 0.03 mm) in fungal pathogens with clear zone of inhibition.