First detection of Edwardsiella ictaluri (Proteobacteria: Enterobacteriaceae) in wild Australian catfish

Kelly, E., Martin, P.A.J., Gibson-Kueh, S., Morgan, D.L., Ebner, B.C., Donaldson, J., Buller, N., Crook, D.A., Brooks, S., Davis, Aaron, Hammer, M.P., Foyle, L., Hair, S., and Lymbery, A.J. (2018) First detection of Edwardsiella ictaluri (Proteobacteria: Enterobacteriaceae) in wild Australian catfish. Journal of Fish Diseases, 41 (2). pp. 199-208.

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Abstract

The bacterium Edwardsiella ictaluri is considered to be one of the most significant pathogens of farmed catfish in the United States of America and has also caused mortalities in farmed and wild fishes in many other parts of the world. E. ictaluri is not believed to be present in wild fish populations in Australia, although it has previously been detected in imported ornamental fishes held in quarantine facilities. In an attempt to confirm freedom from the bacterium in Australian native fishes, we undertook a risk-based survey of wild catfishes from 15 sites across northern Australia. E. ictaluri was detected by selective culturing, followed by DNA testing, in Wet Tropics tandan (Tandanus tropicanus) from the Tully River, at a prevalence of 0.40 (95% CI 0.21–0.61). The bacterium was not found in fishes sampled from any of the other 14 sites. This is the first report of E. ictaluri in wild fishes in Australia.

Item ID: 52130
Item Type: Article (Research - C1)
ISSN: 1365-2761
Keywords: catfish, enteric septicaemia, risk-based sampling, Tandanus tropicanus
Funders: Fisheries Research and Development Corporation (FRDC), Australian Government Research Training Program
Date Deposited: 24 Jan 2018 02:56
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 50%
06 BIOLOGICAL SCIENCES > 0605 Microbiology > 060501 Bacteriology @ 50%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960406 Control of Pests, Diseases and Exotic Species in Fresh, Ground and Surface Water Environments @ 100%
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