SPRING VIRAEMIA OF CARP IN THE UNITED STATES OF AMERICA
Confirmation of the disease in wild fish in the state of Wisconsin
Information received by OIE on 16 October 2002 from Dr Peter Fernandez, Associate Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture (USDA), Washington, DC:
End of previous report period: 31 July 2002 (see Disease Information , 15 , 147, dated 9 August 2002).
End of this report period: 15 October 2002.
The Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Weymouth, United Kingdom (OIE Reference Laboratory for spring viraemia of carp) confirmed spring viraemia of carp virus (SVCv) infection via the virus neutralisation test.
CEFAS reported that the North Carolina (1) and Wisconsin(2) isolates were serologically similar to each other and to an isolate from an imported Chinese koi carp. However, these isolates were serologically distinct from an isolate from the United Kingdom.
The source of infection has not been determined.
Sampling and serological testing of 150 carp from one pool in the Mississippi River will be done to determine if SVCv has spread from the outflow of Cedar Lake, the location of the initial detection. To date, no other detections have been made.
In addition, a monitoring plan is being implemented (in conjunction with State, Federal and local Departments of Wildlife and of Agriculture) to help determine the extent of the agent in wildlife.
The Wisconsin Department of Natural Resources has placed a ban on recreational carp fishing and spearing, and a ban on commercial bait and carp harvest from Cedar Lake.