POST Online Media Lite Edition


Outbreaks of H7N9 avian influenza in poultry in U.S.

Staff Writer |
The USA has reported an outbreak of H7N9 HPAI in a commercial chicken broiler breeder flock in Lincoln County in Tennessee.

Article continues below

A small increase in mortality (700 of 74,000) was reported and tests confirmed HPAI. All birds have been culled and destroyed and disease control measures are in place, including a 10 mile (16 km) surveillance zone. This is the first outbreak of HPAI in the USA this year.

The National Veterinary Services Laboratory (NVSL) has confirmed this is a North American wild bird lineage, based on full genome sequencing and is not related to the Asian H7N9 LPAI / HPAI strain currently circulating in China.

As part of routine surveillance at point of slaughter, H7N9 LPAI virus was also detected in a broiler breeder chicken flock also in Tennessee (Giles County) and the flock was depopulated (OIE, 2017b). Again, the origin of the virus was a North American wild bird lineage.

In other reports, the USA has also detected H5N2 LPAI in a commercial turkey flock in Wisconsin (Barron County). This was a North American wild bird virus and is not related to the viruses which caused multiple cases in 2015.

What to read next

South Africa confirms two more cases of H5N8 bird flu
Qatar lifts ban on poultry imports from Ukraine
UAE lifts ban to import Ukrainian poultry products