E-ISSN 2536-9520 | ISSN 1110-2047
 
2024, Vol: 83
83Current Volume Online First Archive Aims and Scope Abstracting & Indexing Most Accessed Articles Most Downloaded Articles Most Cited Articles

Original Article 


Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish

Samy A. Khalil, Amr Fadel, EmadAl-Ebshahy, Nada H.A. Menesy.


Abstract
One of the most important and distributed bacterial disease in freshwater fish in Egypt is flavobacteriosis disease that caused by the gram-negative bacillus Flavobacterium which infects fish under stressful conditions and causing high mortality. In this study we have attempted to identify the possible infection of three flavobacteria app. (F. columnare, F. covae, and F. davissi) out of 200 cultured African catfish Clarias gariepinus and Nile tilapia tilapia niloticus. The Goal of this study was to isolate and characterize Flavobacteria species phenotypically, biochemically and detect the haemolytic virulence activity, beside evaluation antibiotics resistance activity of this bacterium. Despite, all flavobacteria species cause heamolysis to sheep blood agar that indicate to presence of heamolysine virulence gene but the F.columnare TIL2015 strain show no heamolysis on sheep blood agar. According to antibiotic sensitivity assay Gentamycin 30 μg, was the most effective antibiotic against the all tested Flavobacteria species, however F.columnare strains were sensitive against Doxycycline 30 μg, streptomycin 10 μg, beside gentamycin 30 μg. All isolates were resistant to amoxicillin 30 μg and Cefalexine 30 μg.

Key words: Keywords: Flavobacterium spp, hemolytic activitiy, antibiotic senstivity, and fish


 
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How to Cite this Article
Pubmed Style

Khalil SA, Fadel A, EmadAl-Ebshahy , Menesy NH. Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. AJVS. 2023; 79(1): 44-50. doi:10.5455/ajvs.160357

Web Style

Khalil SA, Fadel A, EmadAl-Ebshahy , Menesy NH. Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. https://www.alexjvs.com/?mno=160357 [Access: December 02, 2024]. doi:10.5455/ajvs.160357

AMA (American Medical Association) Style

Khalil SA, Fadel A, EmadAl-Ebshahy , Menesy NH. Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. AJVS. 2023; 79(1): 44-50. doi:10.5455/ajvs.160357


Vancouver/ICMJE Style

Khalil SA, Fadel A, EmadAl-Ebshahy , Menesy NH. Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. AJVS. (2023), [cited December 02, 2024]; 79(1): 44-50. doi:10.5455/ajvs.160357


Harvard Style

Khalil, S. A., Fadel, . A., EmadAl-Ebshahy, . & Menesy, . N. H. (2023) Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. AJVS, 79 (1), 44-50. doi:10.5455/ajvs.160357


Turabian Style

Khalil, Samy A., Amr Fadel, EmadAl-Ebshahy, and Nada H.A. Menesy. 2023. Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. Alexandria Journal of Veterinary Sciences, 79 (1), 44-50. doi:10.5455/ajvs.160357


Chicago Style

Khalil, Samy A., Amr Fadel, EmadAl-Ebshahy, and Nada H.A. Menesy. "Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish." Alexandria Journal of Veterinary Sciences 79 (2023), 44-50. doi:10.5455/ajvs.160357


MLA (The Modern Language Association) Style

Khalil, Samy A., Amr Fadel, EmadAl-Ebshahy, and Nada H.A. Menesy. "Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish." Alexandria Journal of Veterinary Sciences 79.1 (2023), 44-50. Print. doi:10.5455/ajvs.160357


APA (American Psychological Association) Style

Khalil, S. A., Fadel, . A., EmadAl-Ebshahy, . & Menesy, . N. H. (2023) Phenotypic Characterization of Certain Flavobacteria Species Infected Cultured Freshwater Fish. Alexandria Journal of Veterinary Sciences, 79 (1), 44-50. doi:10.5455/ajvs.160357




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    About Alexandria Journal of Veterinary Sciences

    The Alexandria Journal of Veterinary Sciences (AJVS) Official Journal of Faculty of Veterinary Medicine, Alexandria University   ISSN: 1110 ... Read more.



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