alexa Clinical Outbreaks of Bacterial Kidney Disease (BKD) in Hatchery-Raised Brook Trout (Salvelinus fontinalis) (Mitchill, 1814): Lessons Learned | OMICS International
ISSN: 2155-9546

Journal of Aquaculture Research & Development
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Research Article

Clinical Outbreaks of Bacterial Kidney Disease (BKD) in Hatchery-Raised Brook Trout (Salvelinus fontinalis) (Mitchill, 1814): Lessons Learned

Alaa Eldin Eissa1,2* and Mohamed Faisal3

1Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt

2Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya

3Department of Pathobiology and Diagnostic Investigation, Aquatic Animal Health Laboratory (AAHL), College of Veterinary Medicine, Michigan State University, East Lansing, 48824 MI, USA

*Corresponding Author:
Alaa Eldin Eissa
Department of Fish Diseases and Management
Faculty of Veterinary Medicine
Cairo University
12211 Giza, Egypt
Tel: 0111185035
E-mail: [email protected]

Received Date: March 24, 2014; Accepted Date: June 20, 2014; Published Date: June 30, 2014

Citation:Eissa AE, Faisal M (2014) Clinical Outbreaks of Bacterial Kidney Disease (BKD) in Hatchery-Raised Brook Trout (Salvelinus fontinalis) (Mitchill,1814): Lessons Learned. J Aquac Res Development 5:242 doi:10.4172/2155-9546.1000242

Copyright: © 2014 Eissa AE, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

A number of clinical Bacterial Kidney Disease (BKD) outbreaks caused by Renibacterium salmoninarum infection among the hatchery reared brook (BKT) trout lots were presented during 2002-2004 to the Aquatic Animal Health Laboratory, Michigan State University, MI, USA. Diagnosis of these mortality episodes was performed thorough clinical examination, quantitative enzyme-linked immunosorbant assay (Q-ELISA), nested polymerase chain reaction (nPCR), culture, histopathology and immunohistochemistry (IHC). The possible causes that lead to the initiation and progression of such outbreaks have been investigated. Although Q-ELISA, nPCR and culture results for all of the examined cases indicated a heavy infection with R. salmoninarum, inconsistent results were obtained by histopathology and immunohistochemical examination of the paraffin embedded blocks of the formalin fixed kidney tissues. This study also included assessment of R. salmoninarum infection status in a subsample of BKT broodstocks of the same hatchery. Results indicated the presence of chronic infection in the broodstock with BKDpathognomonic granulomas occupying fairly large portions of the kidney tissues.

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