Importance of lysozyme on development of immunity and prevention of white feces in P. vannamei.

Hello everyone:

      Today we will see about importance of lysozyme enzyme for antibacterial activities in P. vannamei. 

Major problem:

       Majority of shrimp farmers facing white feces syndrome in earlier stage of culture. This will leads to severe economic loss. The exact reason was unknown but vibrio is the important pathogen which associated with majority of infection. 

Ways to reduce white feces syndrome. 

      Different ways followed to reduce or postpone the occurance of white feces. 

# Avoid overfeeding. 

# Maintanence of beneficial bacterial population. 

# Seed selection. 

# # # Maintanence of nursery system. 

# Avoid the accumulation of organic load. 

# Maintain gut health from initial days of culture. 

These are some of the ways for treating white feces. 

Lysozyme effect:

        Lysozyme plays major role in antibacterial activity in shrimp. C type lysozyme is majorly present in shrimps. It is an enzyme which inhibits the growth of bacteria by destructing the cell walls of pathogen. They brokes the enzyme linkages in cell wall and leads to cell death. 

       These enzyme activity is noticed in three important parts of shrimp. Gills, lymphoid organ and gut have major activity of lysozyme. These three places are important for invading the harmful pathogens. 

       There is a lot of chances for bacterial accumulation in gills. When the lysozyme activity is higher and there is a possibility of removing harmful pathogens from body is high. 

        Researchers told the lysozyme inclusion shows antibacterial activity against vibrio species which are the important threat for white feces. 

Egg white with lysozyme:

       Chicken egg white contains majority of lysozyme. Supplementation of lysozyme contained egg plays important role in prevention of white feces in shrimps. 

        The lysozyme present in the egg white invades harmful pathogens from shrimp body and increases the phenoloxidase activity. 

        They are showing activity against gram positive and gram negative bacteria. They also showing increased immunity, growth and survival. By this, we can prevent or postpone the occurance of white feces if the shrimp is negative for EHP. 

        Checking for EHP at 15 and 30 DOC is very important. Maintaining good water quality and pathogen free environment will give good results on culture. 

   

                        Thank you. 

Contact for more info..... 

P. Dhivagar BFSc, 

9384346193.