Europe braces as bird flu spreads in Russia

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http://www.theglobeandmail.com/servlet/story/RTGAM.20050820.wxbird-flu20/BNStory/International/

Moscow — The bird flu that has raised fears of global pandemic has broken into the European continent, Russia confirmed yesterday, as neighbouring countries rushed to prepare their farmers, doctors, and even soldiers on border patrol for the spread of an infection moving rapidly westward from Asia.

Russia has been playing down concerns about avian influenza since it first detected the deadly H5N1 strain in Siberia last month. This week, however, as tests showed the virus has travelled thousands of kilometres across the country, Russian officials quietly invited experts from the United Nations to help.

“I have a green light to go to Moscow,” said Juan Lubroth, senior officer at the UN's Food and Agriculture Organization in Rome, an agency tracking the virus.

The UN team hopes to arrive within a couple of weeks. At least 13,000 birds have already died of the disease in Russia; earlier this week, authorities said they have culled another 130,000 in an attempt to stop the outbreak.

Rospotrebnadzor, the Russian federal service for consumer protection, posted a statement on its website yesterday confirming that bird flu has been detected in the Kalmyk Republic, a southern region on the Caspian Sea. Officials had previously suggested that deaths among wild birds and domestic geese at the region's nature reserves were caused by parasitic worms.

The fight against bird flu on Europe's eastern flank will gain importance in mid-September, experts say, because migrating waterfowl could carry the virus from Russia into Europe and beyond. One strain of the flu has already killed 61 people in Southeast Asia, largely farmers and others who were in close contact with birds. The World Health Organization has repeatedly voiced concern that mutations might produce a virus that spreads easily between humans, with the potential to kill millions.

In the short term, the arrival of the Asian bird flu in Europe could devastate the farm economy. When a similar strain spread among Dutch chickens in 2003, authorities destroyed more than 31 million birds.

“Until now, this disease has located only in Asia,” said Alexander Solokha, a waterfowl expert for Wetlands International in Moscow, which has been helping the Russian government monitor the disease. “But we can expect it will spread along the flyways, west toward the Black Sea.”

Colder weather will push the birds even further southwest to their winter nesting grounds, Mr. Solokha said, which could spread the disease to Ukraine, Bulgaria, Romania, Greece, Italy, Spain, and North Africa.

Despite the scale of the problem, some of the things Mr. Lubroth intends to tell his Russian counterparts are simple. For instance: Don't shoot wild birds.

“The shotgun method isn't much good,” he said.

Local administrators of some Russian regions have suggested enlisting hunters for mass killings of waterfowl, because the wild birds can transmit the disease to livestock.

But experts say it's still unclear whether the disease has been carried by wild birds, shipments of poultry, or some other way across vast distances. Mr. Solokha warned that attacking flocks of birds would only scatter them and potentially spread the problem.

The FAO recommends focusing on prevention among domestic birds by isolating poultry with netting or enclosed barns.

Such measures would likely prove difficult to enforce on Russian family farms where chickens roam freely. Similar problems would face European countries where organic, free-range farming has grown popular, Mr. Lubroth said.

Renate Kuenast, Germany's agriculture minister, told reporters yesterday that Germany is ready to ban free-range poultry. And the government is reportedly considering new control measures for passengers arriving at airports from Russia.

The German authorities appear willing to wait before taking the precautions, but the Dutch Agriculture Ministry yesterday gave its commercial poultry industry just three days to shift their operations indoors, to prevent contact with wild birds.

Britain announced that doctors will receive 50-page technical guides next month to help them identify bird flu and contain outbreaks.

On Russia's western border, Ukrainian troops and customs officials have been instructed to watch for contraband poultry. The European Commission asked its member states last week to ban imports of feathers and live birds from Russia and Kazakhstan, but Ukraine has only blocked live chickens from infected regions.

While Europe scrambles to protect itself, Russia's largely state-controlled media have been skeptical about the threat. The RIA Novosti news agency published an analysis titled: “Bird flu in Russia — scaremongering or real danger?”
 

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http://www.newscientist.com/article.ns?id=dn7905</B>

Chief veterinary officials from the European Union’s 25 member states met in Brussels on Thursday to discuss what to do if wild birds carrying H5N1 bird flu bring it to Europe from Russia. But they concluded it is not clear whether wild birds are spreading the virus in Russia, nor how likely it is that birds migrating into Europe could be carrying it.

H5N1 bird flu has been identified in backyard poultry in the Novosibirsk region of Russia, where an outbreak started in late July. DNA sequence information from samples near Novosibirsk shows it is highly similar to the virus that killed thousands of wild birds at Qinghai Lake in China in May 2005.

Russia has also reported outbreaks involving H5 bird flu in backyard poultry in its Altai Kray, Tyuman, Omsk, Kurgan and Cheyabinsk regions, which cover a band of territory parallel to the northern border of Kazakhstan. H5N1 flu has also been confirmed in Kazakhstan. It is not clear how similar any of these latter viruses are to the Qinghai H5N1 or others that have circulated in east Asia and caused 57 human deaths so far.

But whether this spread is likely to continue into Europe depends on whether it is being carried by healthy migrating birds. If instead the virus is being spread by trade in infected poultry, as it has been in south-east Asia, the picture would be different. And the infections reported so far do coincide geographically with major rail, trade and travel links through the region.

Reservoir risks?
Evidence for spread by wild birds is circumstantial. Yevgeny Nepoklonov, head of the veterinary department of the Russian Agriculture Ministry, told the World Animal Health Organisation (OIE) in Paris this month that in the six territories where outbreaks have been reported, “the first [domestic] birds to be affected are those kept in homes close to reservoirs” – where wild birds may visit.

On the other hand, not one healthy wild bird carrying highly pathogenic H5N1 has yet been reported, apart from a few carrying a somewhat different virus in Hong Kong in 2002. Hon Ip, a virologist at the US National Wildlife Health Center in Madison, Wisconsin, US, notes that in Russia’s report on Novosibirsk to the OIE, the H5N1 virus it had isolated from a wild duck was different from the viruses isolated in its domestic poultry.

“No data that shows the wild birds were the vector of transmission has been made available at the present time,” Ip commented on ProMED-Mail, an internet bulletin board on emerging disease. “The same pattern of spread can just as easily be seen as from the major routes of human transportation.”

Holding fire
Adding to uncertainties, an investigation of an outbreak of bird flu on remote lakes in Mongolia by the Wildlife Conservation Society in August found that only 100 birds of more than 6000 on the lake died, suggesting either that the virus does not infect many birds in wild flocks, or the majority of birds that caught the virus remained healthy carriers.

If wild birds are carrying H5N1, say European veterinary experts, the key to preventing outbreaks will be to prevent contact between poultry and wild birds. Free-range chickens have already been moved under cover in the Netherlands, which has had major outbreaks of other kinds of bird flu recently.

But the vets in Brussels recommended that EU countries: hold their fire, increase their monitoring of flu viruses in wild birds, be ready to destroy infected birds, bring free-range animals inside if the virus is detected. They recommended that in at-risk situations poultry vaccination might be considered as a risk-mitigating measure.

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