ArticleBMC veterinary research2024
Isolation and characterization of Streptococcus agalactiae inducing mass mortalities in cultured Nile tilapia (Oreochromis niloticus) with trials for disease control using zinc oxide nanoparticles and ethanolic leaf extracts of some medicinal plants.
Article in BMC veterinary research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Effects ofBiology · 2026Article
- Effects of Brazilian Pepper Tree (Biology · 2026Article
- Emergence of multidrug-resistant Staphylococcus epidermidis in Nile tilapia (Oreochromis spp.): virulence, antimicrobial resistance, and nanoparticle-based control.BMC veterinary research · 2026Article
- Characterization and antibiogram of bacterial isolates from diseased farmed Nile tilapia in Beheira governorate, Egypt.BMC veterinary research · 2026Article
- Veterinary Regenerative Medicine: The Evolving Role of Stem Cell-Based Therapies.Stem cell reviews and reports · 2025Review
- Unraveling the pathogenic potential, virulence traits, and antibiotic resistance genes of multidrug-resistant Streptococcus agalactiae strains retrieved from Nile tilapia.BMC microbiology · 2025Article
- Review
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Abstract
backgroundStreptococcus agalactiae (Group B streptococcus, GBS) induces a serious infection that can harm not only aquatic life but also humans and other animals. In a fish farm in southern Egypt, Nile tilapia (Oreochromis niloticus) has developed an epidemic with clinical symptoms resembling piscine streptococcosis.
resultsInitial microscopic inspection of the affected fish brain and kidney indicated the presence of Gram-positive cocci. S. agalactiae was effectively isolated and identified using nucleotide homology of the 16S rRNA and species-specific PCR. The partial 16S rRNA sequence was deposited in the GenBank database at the NCBI and given the accession number MW599202. Genotyping using RAPD analysis indicated that the isolates in the present study belonged to the same genotypes and had the same origin. The challenge test, via immersion (9.2 × 10
conclusionThis study isolated S. agalactiae from O. niloticus mortalities in a fish farm in Assiut, Egypt. The pathogen persists in fish environments and can escape through biofilm formation, suggesting it cannot be easily eliminated. However, promising findings were obtained with in vitro control employing zinc oxide nanoparticles and medicinal plant extracts. Nevertheless further in vivo research is needed.
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