Effect of extracellular macromolecules from lactic acid bacteria on the immune response of black tiger shrimp (Penaeus monodon)

Abstract

Extracellular polymeric substances (EPS) are known as prebiotic-like compounds that promote the growth of beneficial bacteria in the intestinal tract of humans and animals. To demonstrate the prebiotic potential of EPSs produced from lactic acid bacteria, Lactobacillus plantarum and Bifidobacterium bifidum, this study demonstrated the influence of these bacteria on the immune response in shrimp to infection with pathogenic bacteria. Vibrio parahaemolyticus disease. The results showed that the diet supplemented with different types of EPS stimulated immunity of black tiger shrimp against acute hepatopancreatic necrosis disease (AHPND), also known as early mortality syndrome (EMS) in shrimp caused by Vibrio parahaemolyticus. The addition of EPS to shrimp feed significantly increased total white blood cell count, respiratory burst activity, phenoloxidase and superoxide dismutase activity. The study results show that EPS produced by lactic acid bacteria shows potential as a prebiotic, which can become an alternative to the use of antibiotics in shrimp farming to inhibit the growth of pathogens.