Arthropods, shrimp or loster, do not possess an adaptive immune response with immunoglobulins, although immunoglobulin like proteins have been found in some insects.
Sulfated polysaccharides are previously shown to inhibit virus adsorption or attachment to the surface of animal cells. The sulfates in fucoidan structure were shown to play an important role in the binding of WSSV. It also controls infection by inhibiting replication of enveloped viruses. Thus, it is a potent prophylactic agent against virus infections, WSSV included. Fucoidan is a kind of sulfated polysaccharide obtained from Laminaria japonica or Undaria Pinnatifida a brown sea alga, which is the excellent potency of Fucoidan than other fucoidan source.
Shrimps that were fed fucoidan everyday exhibited the highest survival rate. It was concluded that fucoidan should be fed everyday to prevent infection of WSSV, white spot syndrome virus. In many experiment with Fucoidan, it is approved that Fucoidan can increase the survival rate for the WSSV infection. Out Fucoimune is desigend for the WVVS infection in the shrimp aquaculturing business.