Rapid identification of pathogenic streptococci isolated from moribund red tilapia (Oreochromis spp.)

Mohamed Abdelsalam; Mamdouh Y. Elgendy; Mohamed Shaalan; Mohamed Moustafa; Masayuki Fujino

doi:10.1556/004.2017.005

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Acta Veterinaria Hungarica

Volume/Issue:: Volume 65: Issue 1

Rapid identification of pathogenic streptococci isolated from moribund red tilapia (Oreochromis spp.)

Authors:

Mohamed Abdelsalam

Mohamed Abdelsalam Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt

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Mamdouh Y. Elgendy

Mamdouh Y. Elgendy Department of Hydrobiology, Veterinary Research Division, National Research Centre, Dokki, Giza, Egypt

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Mohamed Shaalan

Mohamed Shaalan Department of Pathology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
Clinical Division of Fish Medicine, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria

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Mohamed Moustafa

Mohamed Moustafa Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt

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Masayuki Fujino

Masayuki Fujino National Institute of Infectious Diseases, Tokyo, Japan

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Pages:: 50–59

Online Publication Date:: Mar 2017

Publication Date:: 01 Mar 2017

Article Category:: Journal Article

DOI:: https://doi.org/10.1556/004.2017.005

Keywords:: red tilapia; MicroSeq 500; histopathology

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Accurate and rapid identification of bacterial pathogens of fish is essential for the effective treatment and speedy control of infections. Massive mortalities in market-sized red tilapia (Oreochromis spp.) were noticed in mariculture concrete ponds in northern Egypt. Histopathological examination revealed marked congestion in the central vein of the liver with the presence of bacterial aggregates inside the lumen and in the vicinity of the central vein. A total of 12 isolates of streptococci were obtained from the moribund fish. This study documented the ability of the MicroSeq 500 16S bacterial sequencing method to accurately identify Streptococcus agalactiae and S. dysgalactiae mixed infections from moribund red tilapia that were difficult to be recognised by the commercial biochemical systems. The continuously decreasing cost of the sequencing technique should encourage its application in routine diagnostic procedures.

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Acta Veterinaria Hungarica

Print ISSN:: 0236-6290

Online ISSN:: 1588-2705

Editorial Board

Mária BENKŐ (Acta Veterinaria Hungarica, Budapest, Hungary)
Gábor BODÓ (University of Veterinary Medicine, Budapest, Hungary)
Béla DÉNES (University of Veterinary Medicine, Budapest Hungary)
Edit ESZTERBAUER (Veterinary Medical Research Institute, Budapest, Hungary)
Hedvig FÉBEL (University of Veterinary Medicine, Budapest, Hungary)
László FODOR (University of Veterinary Medicine, Budapest, Hungary)
János GÁL (University of Veterinary Medicine, Budapest, Hungary)
Balázs HARRACH (Veterinary Medical Research Institute, Budapest, Hungary)
Peter MASSÁNYI (Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)
Béla NAGY (Veterinary Medical Research Institute, Budapest, Hungary)
Tibor NÉMETH (University of Veterinary Medicine, Budapest, Hungary)
Zsuzsanna NEOGRÁDY (University of Veterinary Medicine, Budapest, Hungary)
Dušan PALIĆ (Ludwig Maximilian University, Munich, Germany)
Alessandra PELAGALLI (University of Naples Federico II, Naples, Italy)
Kurt PFISTER (Ludwig-Maximilians-University of Munich, Munich, Germany)
László SOLTI (University of Veterinary Medicine, Budapest, Hungary)
József SZABÓ (University of Veterinary Medicine, Budapest, Hungary)
Péter VAJDOVICH (University of Veterinary Medicine, Budapest, Hungary)
János VARGA (University of Veterinary Medicine, Budapest, Hungary)
Štefan VILČEK (University of Veterinary Medicine in Kosice, Kosice, Slovak Republic)
Károly VÖRÖS (University of Veterinary Medicine, Budapest, Hungary)
Herbert WEISSENBÖCK (University of Veterinary Medicine, Vienna, Austria)
Attila ZSARNOVSZKY (Szent István University, Gödöllő, Hungary)

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Acta Veterinaria Hungarica
Language	English
Size	A4
Year of Foundation	1951
Volumes per Year	1
Issues per Year	4
Founder	Magyar Tudományos Akadémia
Founder's Address	H-1051 Budapest, Hungary, Széchenyi István tér 9.
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ISSN	0236-6290 (Print)
ISSN	1588-2705 (Online)