H5N8 Branching Out To Europe & Japan
The past couple of weeks have been marked by the rapid geographic expansion of the avian H5N8 virus – first seen less than a year ago on the Korean Peninsula. Highly pathogenic in poultry – this virus has not yet been seen to infect humans – although it is a close cousin to the H5N1 virus which certainly can.
For now, the big threat is to agriculture, not public health.
As we saw in 2006 (see H5N8: A Case Of Deja Flu?), newly emerging avian flu viruses can sometimes travel very rapidly across large distances – often aided and abetted by migratory birds and the poultry trade. We saw the number of countries infected with avian H5N1 jump from 16 at the end of 2004 to 56 by the end of 2006.
With H5N8 now showing up in Germany, the UK, and the Netherlands, today the FAO has issued a warning to all nations to be alert and to be prepared to deal with this new bird flu threat.
FAO and OIE urge at-risk countries to step-up prevention efforts through increased bio-security
Surveillance systems to detect virus outbreaks include laboratory testing.
24 November 2014, Rome/Paris - A new bird flu strain detected in Europe which is similar to strains reported to be circulating in 2014 in Asia poses a significant threat to the poultry sector, especially in low-resourced countries situated along the Black Sea and East Atlantic migratory routes of wild birds, FAO and the World Organisation for Animal Health (OIE) warned today.
Germany, the Netherlands and the United Kingdom have confirmed the new avian influenza virus strain H5N8 on poultry farms, and German authorities have also found the virus in a wild bird.
Earlier this year, the People's Republic of China, Japan and the Republic of Korea reported outbreaks of H5N8 in poultry as well as findings in migratory birds and waterfowl. The fact that the virus has now been found within a very short time interval in three European countries, both in a wild bird and in three very different poultry production systems, suggests that wild birds may have played a role in spreading the virus, FAO and OIE experts said.
H5N8 has so far not been confirmed to infect people. However, it is highly pathogenic for domestic poultry, causing significant mortality in chickens and turkeys. The virus can also infect wild birds, which show little signs of illness. It is known from other influenza viruses that wild birds are able to carry the virus long distances.
Should poultry systems with low-biosecurity conditions become infected in countries with limited veterinary preparedness, the virus could spread through farms with devastating effects, both on vulnerable livelihoods as well as on country economies and trade. The best way for countries to safeguard against these impacts is to encourage better biosecurity and to maintain surveillance systems that detect outbreaks early and enable veterinary services to respond rapidly.
The new virus strain provides a stark reminder to the world that avian influenza viruses continue to evolve and emerge with potential threats to public health, food security and nutrition, to the livelihoods of vulnerable poultry farmers, as well as to trade and national economies. Therefore extreme vigilance is strongly recommended while progressive control efforts must be sustained and financed.
In particular, to protect poultry-related livelihoods and trade, FAO and OIE are recommending at-risk countries to:
- increase surveillance efforts for the early detection of H5N8 and other influenza viruses;
- maintain and further strengthen rapid response capacities of veterinary services;
- reinforce biosecurity measures, with particular emphasis on minimizing contact between domestic poultry and wild birds;
- raise awareness of hunters and other individuals who may come into contact with wildlife in order to provide early information on sick or dead wild birds.
The new strain of avian influenza has not resulted in human cases. Nevertheless it is related to the H5N1 virus, which is known to have spread from Asia into Europe and Africa in 2005-2006. The H5N1 epidemic, in which wild birds have also been implicated, has caused the deaths of nearly 400 people and hundreds of millions of poultry to date. Therefore prudent and precautionary interventions at the animal level are warranted.