E-ISSN 2536-9520 | ISSN 1110-2047
 

Original Article 


Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt

Hosam Aldin A. Al-fattah, Nader Mahmoud, Mohamed Abd Al-razik, Fatma Abd Al-moghny, Madiha S. Ibrahim.


Abstract
This study was conducted for isolation and identification of Streptococcus iniae from Oreochromis niloticusfish farms using traditional and molecular PCR techniques. Forty-seven isolates of Streptococcus were recovered from 232 fish samples from successive 4 seasons during 2015. Summer showed the highest prevalence with 34.9%. S. iniae was identified as the causative agent for streptococcosis in 3 seasons by PCR using S. iniae specific-16S rRNA primers. Experimental infection was performed to determine the pathogenicity of S. iniae for O.nloticus and the best antibiotics to be used for treatment of streptococcosis. S. iniae caused 70% mortalities in experimentally infected fish. Several histopathological alterations were observed in the liver, spleen, kidney and gills of the infected fish. The most effective antibiotics for treatment were Ampicillin with no mortalities, followed by Penicillin and Tetracycline with 10% mortality for both.

Key words: S. iniae, Oreochromis niloticus, antibiotics, Egypt


 
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How to Cite this Article
Pubmed Style

Al-fattah HAA, Mahmoud N, Al-razik MA, Al-moghny FA, Ibrahim MS. Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. AJVS. 2020; 64(2): 123-128. doi:10.5455/ajvs.4984617


Web Style

Al-fattah HAA, Mahmoud N, Al-razik MA, Al-moghny FA, Ibrahim MS. Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. https://www.alexjvs.com/?mno=243929 [Access: May 05, 2025]. doi:10.5455/ajvs.4984617


AMA (American Medical Association) Style

Al-fattah HAA, Mahmoud N, Al-razik MA, Al-moghny FA, Ibrahim MS. Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. AJVS. 2020; 64(2): 123-128. doi:10.5455/ajvs.4984617



Vancouver/ICMJE Style

Al-fattah HAA, Mahmoud N, Al-razik MA, Al-moghny FA, Ibrahim MS. Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. AJVS. (2020), [cited May 05, 2025]; 64(2): 123-128. doi:10.5455/ajvs.4984617



Harvard Style

Al-fattah, H. A. A., Mahmoud, . N., Al-razik, . M. A., Al-moghny, . F. A. & Ibrahim, . M. S. (2020) Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. AJVS, 64 (2), 123-128. doi:10.5455/ajvs.4984617



Turabian Style

Al-fattah, Hosam Aldin A., Nader Mahmoud, Mohamed Abd Al-razik, Fatma Abd Al-moghny, and Madiha S. Ibrahim. 2020. Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. Alexandria Journal of Veterinary Sciences, 64 (2), 123-128. doi:10.5455/ajvs.4984617



Chicago Style

Al-fattah, Hosam Aldin A., Nader Mahmoud, Mohamed Abd Al-razik, Fatma Abd Al-moghny, and Madiha S. Ibrahim. "Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt." Alexandria Journal of Veterinary Sciences 64 (2020), 123-128. doi:10.5455/ajvs.4984617



MLA (The Modern Language Association) Style

Al-fattah, Hosam Aldin A., Nader Mahmoud, Mohamed Abd Al-razik, Fatma Abd Al-moghny, and Madiha S. Ibrahim. "Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt." Alexandria Journal of Veterinary Sciences 64.2 (2020), 123-128. Print. doi:10.5455/ajvs.4984617



APA (American Psychological Association) Style

Al-fattah, H. A. A., Mahmoud, . N., Al-razik, . M. A., Al-moghny, . F. A. & Ibrahim, . M. S. (2020) Characterization and Pathogenicity of Streptococcus Iniae Isolated from Oreochromis Niloticus Fish Farms in Kafr-Elshiekh Governorate, Egypt. Alexandria Journal of Veterinary Sciences, 64 (2), 123-128. doi:10.5455/ajvs.4984617





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