In a report to be published Monday, the journal forecasts that almost half the children in the Americas will be obese by 2010, up from the current level of about one-third.

In Europe, the proportion will rise to nearly 40 per cent from about 25 per cent.

Dr. Philip James, chairperson of the International Obesity Task Force, described the development as an "epidemic."

Researchers reached the conclusion based on a series of reports tracking obesity in school children in 25 countries and younger kids in 42 countries.

* FROM JAN. 17, 2006: Canadians getting dangerously fatter, study says

Obesity rose in most of the countries, based on factors including a lack of exercise and the easy availability of junk food, reinforced by massive advertising.

Experts are predicting dire consequences for health-care systems as fat children become fat adults.

Dr. Brian McCrindle, a childhood obesity expert at Toronto's Hospital for Sick Children, told the Associated Press that governments should consider banning food ads aimed at children.

Scientists are also saying that soft drinks are causing problems.

Two studies are expected to be published this week that link obesity and soft drinks.

The Federal Veterinary Office said in Bern that it had sent samples, as with previous cases, to an EU laboratory in Britain totest whether the birds had died of the most dangerous H5N1 virus.

So far only one H5N1 case involving a wild duck has been confirmed in the country, whose lakes usually attract a lot of migratory wild birds.

No domestic fowl in the country have tested positive for the disease.

The veterinary office said that it expected further cases in the next few days as surveillance programs have been stepped up around the country.

Meanwhile, Prime Minister Kazimierz Marcinkiewicz said Poland is fully prepared for any bird flu outbreak.

The two swans were found dead two days ago on the banks of the Vistula River in the northern city of Torun.

The affected areas have been placed under close surveillance. The central European country has told the EU Commission it will take all necessary measures to contain the virus.

Earlier in the day, the Polish television network TVP3 reportedthe first case of the H5N1 virus in a swan found dead in north Poland, adding the information has been unofficially confirmed by the head of the veterinary services.

Local veterinary authorities have set up a safety zone of a three km radius around the area where the swan was found, and moreprotective measures will be taken in the city soon, TVP3 said.

Neighboring Germany has reported several bird flu cases near the border during the past few days.

Polish veterinary authorities have ordered strict surveillance of the border areas, ordering the poultry to be kept indoors.

Cases of the highly pathogenic H5N1 virus, which has killed at least 92 people, mostly in Asia, since 2003, have been reported ineight EU countries -- Austria, Germany, France, Greece, Hungary, Italy, Slovenia and Slovakia.

Experts from the World Health Organization (WHO), meeting in Geneva, said the spread of bird flu was unprecedented and the threat of a human pandemic would not go away.

China said on Sunday the H5N1 virus had killed a man in southern Guangdong province, which borders Hong Kong. There had been no reported outbreaks in birds in the area where he died and experts in Hong Kong urged authorities to find the source.

The WHO has previously confirmed 94 human deaths from bird flu since late 2003. The virus remains essentially an animal disease which humans contract through close contact with infected birds.

However, the virus is mutating and there are fears it may eventually change enough to be transmitted easily from human to human.

The virus is currently spreading rapidly among wild birds and has reached 15 new countries over the past month, moving across Europe and also hitting Egypt and West Africa.

Austria said the H5N1 virus has been found in several cats in the southern region of Styria, a rural area which has reported outbreaks of the virus in wild swans and ducks. A dead cat in northern Germany was found to have the virus last week.

The WHO has played down the threat to human health from infection in domestic cats, but the news has alarmed pet-loving Europeans and made headlines across the continent. It is thought that cats are getting the virus by eating infected birds.

Two dead swans found in northern Poland had H5N1, the Polish veterinary institute was quoted as saying by the PAP news agency on Monday. "It was the H5N1 strain. It's certain," the institute's Jan Zmudzinski said.

The rapid spread of the virus has dealt a heavy blow to Europe's poultry industry and heightened fears for human health.

"Events in recent weeks justify our concern," said Margaret Chan, the WHO's top influenza official, at the start of a three-day meeting to prepare defenses against a pandemic.
Hong Kong fears

Experts in Hong Kong are demanding to know how thorough surveillance of the disease is in China after Chinese officials reported a ninth human death from the virus.

"It may mean that the surveillance system is not good enough to detect such an outbreak, or poultry deaths have not been handled as seriously as human cases, that they are buried or burnt without investigating the cause," said infectious disease expert Lo Wing-lok in Hong Kong on Monday.

"There is a case for the Guangdong provincial government to come clean on the situation of poultry infection in Guangdong."

Guangdong shares a land border with Hong Kong, where the H5N1 virus made its first known jump to man in 1997, killing six people.

Health experts stress there is no risk from eating properly cooked meat, but fears over the virus have dented consumption.

France, which has Europe's largest poultry industry, has said it is losing 40 million euros ($48 million) a month after an outbreak of H5N1 at a poultry farm. The news led more than 40 countries to impose curbs on French poultry products, including foie gras.

France announced a new case of H5N1 in a wild duck in the east of the country on Sunday, while another test on a wild swan showed the virus had spread several hundred km (miles) south to the Mediterranean Bouches-du-Rhone area.

U.S. Agriculture Secretary Mike Johanns said on Saturday the United States was preparing for an outbreak of avian flu and assured consumers that poultry remained safe to eat.

"There is no way to put a big cage around the United States. I think it is fair to assume we'll deal with ... avian influenza," said Johanns. "We could see it in domestic flocks as well as (wild) birds."