TAURA SYNDROME IN THE UNITED STATES OF AMERICA
Follow-up report No. 1
See also: 11 June 2004
Information received on 28 June 2004 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: 10 June 2004 (see Disease Information , 17 , 157, dated 11 June 2004).
End of this report period: 28 June 2004.
A total of 16 ponds at the 38-pond facility have now tested positive for Taura syndrome virus.
Total number of animals in the outbreak (updated data): species: cru; susceptible: > 9,600,000; cases: 16 ponds; deaths: 80-90%; destroyed: 0; slaughtered: 0
A. Laboratories where diagnosis was made:
- Texas Veterinary Medical Diagnostic Laboratories (TVMDL), College Station, Texas.
- OIE Reference Laboratory at the University of Arizona.
B. Diagnostic tests used:
- in situ hybridisation;
- polymerase chain reaction (PCR).
C. Causal agent: the OIE Reference Laboratory for shrimp pathogens has determined that the Taura syndrome virus isolated in Texas is 97.4% similar to isolates from the Americas, 95.7% similar to a Belize isolate and 98.2% similar to Asian isolates in the OIE Reference Laboratory collection. Comparisons were made based on sequence data from VP1.
Source of agent / origin of infection: unknown.
- control of wildlife reservoirs;
- quarantine and movement control inside the country;
- stamping out.