UN warning about swine flu in birds

August 28, 2009

UN warns over swine flu in birds

By Sudeep Chand Science reporter, BBC News

The discovery of swine flu in birds in Chile raises concerns about the spread of

the virus, the UN warns.

Last week the H1N1 virus was found in turkeys on farms in Chile. The UN now says

poultry farms elsewhere in the world could also become infected.

Scientists are worried that the virus could theoretically mix with more

dangerous strains. It has previously spread from humans to pigs.

However, swine flu remains no more severe than seasonal flu...

Dangerous strains

The emergence of a more dangerous strain of flu remains a theoretical risk.

Different strains of virus can mix together in a process called genetic

reassortment or recombination.

So far there have been no cases of H5N1 bird flu in flocks in Chile.

However, Dr Lubroth said: " In Southeast Asia there is a lot of the (H5N1) virus

circulating in poultry.

" The introduction of H1N1 in these populations would be of greater concern. "

Colin Butter from the UK's Institute of Animal Health agrees.

" We hope it is a rare event and we must monitor closely what happens next, " he

told BBC News.

" However, it is not just about the H5N1 strain. Any further spread of the H1N1

virus between birds, or from birds to humans would not be good.

" It might make the virus harder to control, because it would be more likely to

change. "

Karesh, vice president of the Wildlife Conservation Society, who studies

the spread of animal diseases, says he is not surprised by what has happened.

" The location is surprising, but it could be that Chile has a better

surveillance system.

" However, the only constant is that the situation keeps changing. "

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