Isolation and characterization of a from fish pond water.

Introduction: The intricate habitats of aquatic organisms, coupled with the prevalence of pathogens, contribute to a high incidence of various diseases, particularly bacterial infections. Consequently, the formulation of sustainable and effective disease management strategies is crucial for the thriving aquaculture sector.

Methods And Results: In this investigation, a strain of , designated , was isolated from a freshwater fish pond. Identification was achieved through microscopic examination of morphological characteristics, biochemical property assessment, and phylogenetic analysis. The lysogenic capability of was evaluated, revealing its effectiveness in lysing , , , , and . Physiological analysis indicated that the optimal ratio of to host bacteria was 1:10,000, with strict aerobic requirements. The optimal pH range for growth and reproduction was 7.0-8.0, the ideal temperature was found to be 30-35°C, with a preferred Na concentration of 0% and a Ca concentration of 15-25 mM. Additionally, demonstrated enhanced lytic activity against bacteria in aquaculture effluent while effectively managing ammonia-nitrogen levels.

Discussion: In summary, holds significant promise for development as a probiotic agent in aquaculture.