Anti-viral agents prepared from sea lettuce as raw material

Abstract

Antiviral agents containing sea lettuce or an organic solvent extraction fraction thereof as an active component, and feeds containing the antiviral agents are disclosed. In addition, a process for preparing the antiviral agents is disclosed.

What is claimed is:  
     
         1 . Antiviral agents comprising sea lettuce or an organic solvent extraction fraction thereof as an active component.  
     
     
         2 . Use of the antiviral agents according to  claim 1 , wherein the agent are used for therapy or prophylaxis of fish diseases.  
     
     
         3 . Antiviral feeds comprising the antiviral agents according to  claim 1  along with feeds for animal.  
     
     
         4 . A process for preparing antiviral agents comprising: 
 a step of extracting sea lettuce with water for removing water-soluble components from the collected sea lettuce;    a step of extracting a lipophilic fraction from the residue obtained by the step of extracting with water; and    a step of drying the lipophylic fraction obtained from the step of extracting with organic solvent.