EFFECT OF LACTOBACILLUS ACIDOPHILUS AS PROBIOTIC ON JUVENILE TIGER PRAWN PENAEUS MONODON DURING VIBRIO ALGINOLYTICUS CHALLENGEA. RANGAPPA, T. RAJ KUMAR, G. SUJAY KUMAR AND M. SRINIVASULU REDDYAbstract Cell free extract of Lactic acid bacteria (LAB) Lactobacillus acidophilus inhibited growth of Vibrio alginolyticus. Juveniles of Penaeus monodon (average weight 0.985 ±0.1 g) on administering orally a moist feed base containing 5 x 106 (cells-g of) Lactobacillus acidophilus for a period of four weeks showed better survival (80%) when challenged with V alginolyticus by intra-muscular injection of 0.1 mL containing 3 x 109 cells mL Animals maintained on a diet devoid of bacterial biomass exhibited 80% mortality. No external or internal pathological changes were observed in shrimp fed with the LAB incorporated diets. Results showed inhibition of V. alginolyticus by LAB and stimulation of the non-specific immune response resulting in resistance to disease in the shrimp fed on LAB incorporated diets.
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