Follow Up Report No. 1 from the Taiwanese veterinary authority to OIE gives details of the latest case of LPAI. It started on 27 January on a farm in Fang-Yuan township in Chang-hua municipality in the west of Taiwan. Twenty of the 29,000 layers on the farm were affected but none has died.
The report adds that after the previous outbreak identified on 9 January 2010, epidemiological and clinical health investigations were conducted on 113 poultry farms within a three kilometre-radius of the index farm. In this investigation, a layer farm was tested positive by virus isolation. Movement control on this farm has also been implemented. The results of clinical findings, laboratory tests and basic amino acid motifs of the HA0 cleavage site demonstrate that the virulence of the virus is low pathogenic. The IVPI test and the sequence of nucleic acid of this virus isolate are on-going and the result will be reported to the OIE.
As to the index farm, the local veterinary authority has collected samples again for the detection of the virus and a negative result was obtained on 5 February 2010. By determining the basic amino acid of the cleavage site of the haemagglutinin and by IVPI test (IVPI=0) and gene sequencing, it has been demonstrated that the virulence of the virus is low pathogenic. The movement control on the farm was released by the local veterinary authority on 5 February 2010.
The presence of the H5N2 sub-type of the virus in the layers on the latest farm to be affected has been identified.
Further Reading
Further Reading
12 February 2010
3 minute read
