Abstract

Viral haemorrhagic septicaemia in Canada.

OIE
OIE Disease Information (on-line)
19
29
2006
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: … cases: … deaths: … destroyed: … slaughtered: …
Depending on the species affected, die-offs have ranged from a few fish to several thousand.

Affected population:
wild fish in fresh water.

Diagnosis:
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

OIE