VIRAL HAEMORRHAGIC SEPTICAEMIA IN CANADA
( Date of previous outbreak of viral haemorrhagic septicaemia in Canada reported to the OIE: 2005).
Immediate notification report
Information received on 14 July 2006 from Dr Brian Evans, Chief Veterinary Officer, Canadian Food Inspection Agency, Ottawa:
Report date: 12 July 2006.
Reason for immediate notification: occurrence in a new host species.
Identification of agent: strain IVb of the viral haemorrhagic septicaemia virus (VHSV).
New host species:
Latin name/ Common name: Aplodinotus grunniens/ freshwater drum; Lepomis macrochirus/ bluegill; Micropterus dolomieui/ smallmouth bass; Pomoxis nigromaculatus/ black crappie
These species of fish are currently not listed in the Aquatic Animal Health Code as being susceptible to VHS.
Date of first confirmation of the event: 10 May 2006.
Date of start of the event: 10 May 2006.
Clinical disease: yes.
Nature of diagnosis: clinical and basic and advanced laboratory tests.
Details of occurrence:
First administrative division (province): Ontario; Type of epidemiological unit: lake; Name of the location: Lake St. Clair; Date of start of the occurrence: 10 May 2006; Species: pis; Number of animals in the occurrence: susceptible:
Depending on the species affected, die-offs have ranged from a few fish to several thousand.
Affected population: wild fish in fresh water.
Laboratories where diagnostic tests were performed: University of Guelph, College of Veterinary Medicine and Fish Health Laboratory (local laboratory) / Pacific Biological Station, Fisheries and Oceans (Canada reference laboratory for VHS); Species examined: pis / pis; Diagnostic tests used: . a . cell culture b. PCR(1);/ PCR(1); Dates: 10 May 2006 / 10 May 2006;
Results: positive / positive
Source of occurrence or origin of infection: unknown or inconclusive.
Treatment of infected animals: no.
Vaccination prohibited: no.
Other details/comments: monitoring will continue and any significant information will be reported.
Final report: yes.
(1) PCR: polymerase chain reaction