Isolation and Invitro Evaluation of Bacteriophage Therapy Targeting Streptococcus agalactiae in Nile Tilapia (Oreochromis niloticus) : A Potential Approach to Sustainable Disease Management in Aquaculture

). Suboptimal water quality parameters, including low dissolved oxygen (3.6 mg/L) and elevated iron (1321 μg/L), likely exacerbated infection severity. These findings underscore S. agalactiae's pathogenicity and position bacteriophage therapy as a promising, eco-friendly biocontrol strategy, warranting further in vivo validation to optimise its application in tilapia aquaculture.