SPRING VIRAEMIA OF CARP IN UNITED STATES OF AMERICA
(Disease never reported before).
Information received by OIE on 11 July 2002 from Dr Peter Fernandez, Associate Deputy Administrator, International Services, United States Department of Agriculture (USDA), Washington, DC:
Report date: 11 July 2002.
Nature of diagnosis: laboratory.
Date of initial detection of animal health incident : 24 April 2002.
Outbreaks: Location: Kernersville, State of North Carolina. No. of outbreaks : 1 hatchery complex comprising 6 farms
Description of affected population: koi carp (Cyprinus carpio).
Total number of animals in the outbreak*:
species: pis.; susceptible: 150 000 ; cases: ... ; deaths : 15 000 ; destroyed: 135 000 ; slaughtered: 0
* The figures refer to the fish population of the two farms that were affected out of a total of six farms in the complex.
A. Laboratories where diagnosis was made:
- The disease was diagnosed on 24 April 2002 at the University of Arkansas Diagnostic Laboratory at Pine Bluff, State of Arkansas.
- Diagnosis was confirmed on 5 July 2002 by the Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Weymouth Laboratory, United Kingdom (OIE Reference Laboratory for spring viraemia of carp).
B. Diagnostic tests used: tissue culture, immunocytochemistry.
C. Causal agent: spring viraemia of carp virus (rhabdovirus).
A. Source of agent / origin of infection: the source of infection has not yet been identified.
B. Other epidemiological details: the possibility of tracing the source of the virus is very limited. The establishment ships and receives fish on a weekly basis. The hatchery is located adjacent to a river and river water is used on the premises.
- As a result of the detection, 135,000 koi carp were destroyed at the hatchery.
- All six farms in the hatchery complex are under quarantine.
- The control plan is to depopulate and disinfect the tanks in the holding facility. A disinfection, decontamination, and testing protocol for spring viraemia of carp virus will be used to identify and maintain disease-free ponds and fish.
- Fish and Wildlife authorities will be notified because this disease can affect common carp.