Document Detail

Experimental Infection of Australian Freshwater Fish with Epizootic Haematopoietic Necrosis Virus (EHNV).
MedLine Citation:
PMID:  23339340     Owner:  NLM     Status:  In-Data-Review    
Abstract The ranavirus, epizootic hematopoietic necrosis virus (EHNV), is endemic to southern Australia with natural outbreaks resulting in mass mortality events in wild Redfin Perch Perca fluviatilis (also known as Eurasian Perch) and less severe disease in farmed Rainbow Trout Oncorhynchus mykiss. To further investigate the host range for EHNV, 12 ecologically or economically important freshwater fish species from southeastern Australia were exposed experimentally to the virus. A bath-challenge model at 18 ± 3°C was employed with limited use of intraperitoneal inoculation to determine if a species was likely to be susceptible to EHNV. Of the species tested, Murray-Darling Rainbowfish Melanotaenia fluviatilis and Dewfish Tandanus tandanus (also known as Freshwater Catfish) were considered to be potentially susceptible species. EHNV was isolated from approximately 7% of surviving Eastern Mosquitofish Gambusia holbrooki, indicating this widespread alien fish species is a potential carrier. The infection of Silver Perch Bidyanus bidyanus and Macquarie Perch Macquaria australasica and the lack of infection in Murray Cod Maccullochella peelii peelii and Golden Perch Macquaria ambigua ambigua after exposure to EHNV via water confirmed earlier data from Langdon (1989). Five other species of native fish were potentially not susceptible to the virus or the fish were able to recover during the standard 35-d postchallenge observation period. Overall, it appeared that EHNV was less virulent in the present experimental model than in previous studies, but the reasons for this were not identified. Received May 21, 2012; accepted November 1, 2012.
Joy A Becker; Alison Tweedie; Dean Gilligan; Martin Asmus; Richard J Whittington
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of aquatic animal health     Volume:  25     ISSN:  0899-7659     ISO Abbreviation:  J. Aquat. Anim. Health     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-01-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9884881     Medline TA:  J Aquat Anim Health     Country:  United States    
Other Details:
Languages:  eng     Pagination:  66-76     Citation Subset:  IM    
a Faculty of Veterinary Science , University of Sydney , 425 Werombi Road , Camden , New South Wales , 2570 , Australia.
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