Infectious Diseases 2018

Infectious Diseases 2018

H5N2 HPAI poultry in Western Russia

Source: DEFRA 17 August, 2018

The Russian authorities have reported an outbreak of H5N2 HPAI in a commercial farm of nearly 500,000 birds in Kostromskaya region, NW Russia. According to the disease report, sequencing analysis showed the virus belonged to the Asia lineage (clade 2.3.3.4) which is the clade of H5 HPAI viruses which has been detected in multiple wild bird and poultry cases across Asia, Africa and Europe since 2014. There have been no human cases associated with H5N2 HPAI infection in areas where it circulates. Since early June, 67 outbreaks of H5 have been reported in commercial poultry across several regions of western Russia including Orlov, Saratov, Kur, Smolensk, Samar, Rostovand Penzen. In July, a new focus of circulating virus in Tatarstan, Nizhegorod, Chuvash, Udmurt, Ul’Yanov and Mariy-El regions was reported, in backyard flocks but there is no information on the full strain identification. H5N6 HPAI has also recently been reported in a wild mute swan (Cygnus olor) in Denmark, therefore this virus is still present in some areas of Europe and certain wild bird species.