E-ISSN 2536-9520 | ISSN 1110-2047
 
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Original Article
Online Published: 24 Feb 2017
 


Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate

Hosam A. Saleh, Nader M. Sabry, Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim.


Abstract
This study was conducted for isolation and identification of Streptococcus iniae from Oreochromis niloticus fish 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 streptococcosisin 3 seasons by PCR using S. iniae specific-16S rRNA primers. Experimental infection was performed to determine the pathogenicity of S. iniae for O.nloticusand 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

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. AJVS. 2017; 52(1): 173-179. doi:10.5455/ajvs.243929

Web Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. https://www.alexjvs.com/?mno=259641 [Access: September 12, 2024]. doi:10.5455/ajvs.243929

AMA (American Medical Association) Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. AJVS. 2017; 52(1): 173-179. doi:10.5455/ajvs.243929


Vancouver/ICMJE Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. AJVS. (2017), [cited September 12, 2024]; 52(1): 173-179. doi:10.5455/ajvs.243929


Harvard Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim (2017) Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. AJVS, 52 (1), 173-179. doi:10.5455/ajvs.243929


Turabian Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. 2017. Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. Alexandria Journal of Veterinary Sciences, 52 (1), 173-179. doi:10.5455/ajvs.243929


Chicago Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. "Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate." Alexandria Journal of Veterinary Sciences 52 (2017), 173-179. doi:10.5455/ajvs.243929


MLA (The Modern Language Association) Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim. "Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate." Alexandria Journal of Veterinary Sciences 52.1 (2017), 173-179. Print. doi:10.5455/ajvs.243929


APA (American Psychological Association) Style

Hosam A. Saleh, Nader M. Sabry , Mohamed Abd Al-Razik, Fatma A.S. Mohamed, Madiha S. Ibrahim (2017) Pathogenicity and Characterization of Streptococcosis in Egyptian Nile Tilapia (Oreochromis niloticus) in Kafr Elshikh Governorate. Alexandria Journal of Veterinary Sciences, 52 (1), 173-179. doi:10.5455/ajvs.243929




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