Infectious Diseases 2008

Infectious Diseases 2008

USA: LPAI found in game birds

USA - LPAI 4 September, 2008 Low pathogenic avian influenza H5N8 was found in game birds in Idaho, Payette county. The virus was diagnosed in a game birds farm, approximately 30,000 game birds (pheasants, chukars, partridges, mallard ducks) which are bred and used for release activities (hunting). There was no report of major mortality losses in the game birds. At this time, the positive results only trace back to the pheasant pen (approximately 1,000 pheasants). The game bird owner recently submitted three dead birds to the Pennsylvania Animal Diagnostic Laboratory and Pennsylvania State University (PSU) for diagnostic work-up. The PSU laboratory identified Pasturella and Mycoplasma from culture but also ran the PCR test for avian influenza (AI), which is a routine testing procedure. The PCR test gave positive results for AI. Samples were also forwarded to the National Veterinary Services Laboratories (NVSL) for confirmation.
On 29 August 2008: the NVSL confirmed an H5 positive, N1 negative PCR finding.
On 2 September 2008: the NVSL confirmed and reported an H5N8 positive virus from samples taken from pheasants on the game bird premises.
On 3 September 2008: sequencing results from NVSL were compatible with low pathogenic avian influenza. The sequence is approximately 98.5% similar to A/mallard/BC/373/2005 H5N2 and 98.3% similar to A/tundra swan/AK/44049-168/2006 H5N2.