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September 18, 2025Egyptian Journal of Veterinary ScienceOpen Access

Pathophysiological and Molecular Characterization of Streptococcus agalactiae in Farmed Nile Tilapia

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Authors

RARana AttiaMEMai A.M. El-SonSSSaleh M. Shafik

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Overview

Investigation of Streptococcus agalactiae infection reveals significant pathophysiological impacts in Nile tilapia, highlighting urgent biosecurity needs.

Key Points

  • Infection with streptococcus agalactiae resulted in significant oxidative stress in Nile tilapia, increasing mortality rates.
  • The overall prevalence of streptococcus agalactiae in examined specimens was found to be 15%, a serious concern for aquaculture.
  • Experimental trials showed increased levels of nitric oxide and malondialdehyde, alongside decreased antioxidant biomarkers in affected fish.
  • Histopathological analysis revealed severe lesions such as hepatic degeneration and renal tubular necrosis in infected Nile tilapia.

Cite This Study

Attia et al. (2025) studied this question.

synapsesocial.com/papers/68d435d6713b0b5dfea750bfhttps://doi.org/10.21608/ejvs.2025.395469.2912
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