E-ISSN 2536-9520 | ISSN 1110-2047
 

Original Research (Original Article) 


Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah 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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Pubmed Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.


Web Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt. http://www.alexjvs.com/?mno=243929 [Access: February 11, 2020].


AMA (American Medical Association) Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.



Vancouver/ICMJE Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.



Harvard Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim (0) Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.



Turabian Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. 0. Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.



Chicago Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. "Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt."



MLA (The Modern Language Association) Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim. "Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt."



APA (American Psychological Association) Style

Hosam Saleh, Nader Mahmoud, Mohamed Abd Al-Razik, Fatma Abd Al-Moghny, Madiha Salah Ibrahim (0) Characterization and pathogenicity of Streptococcus iniae isolated from Oreochromis niloticus fish farms in Kafr-Elshiekh Governorate, Egypt.





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