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Argentine workers suspected of passing flu to pigs

(Agencies)
Updated: 2009-07-02 09:07

BUENOS AIRES: Workers at an Argentine farm apparently infected pigs with the new H1N1 flu strain, only the second suspected case of humans passing the deadly virus to swine, a government spokesman said on Wednesday.

The World Health Organization declared a pandemic last month in an effort to control the spread of the flu virus, which first appeared in the United States and Mexico, but has since spread across the world and killed more than 300 people.

Related readings:  Flu Pandemic Outbreak Related readings:  First H1N1 mass infection in Beijing  H1N1 flu patient dies in East China  Brazil confirms 55 new A(H1N1) flu cases  Battle against H1N1 may develop new diagnosis  H1N1 flu fears hit All England Club

Genetic tests have shown the new H1N1 strain is clearly a pig virus and not a human virus, although people are catching it from other people and not from animals.

However, the Argentine case adds weight to the theory that pigs can be infected by humans.

In Canada, a farm worker was suspected of passing the virus to a herd of pigs. Blood testing later cleared him but health officials did not rule out the possibility that a human infected the animals.

"Our theory is that the pigs were infected by the farm workers who had had flu symptoms a week before the pigs started to show symptoms," the Argentine government farm spokesman said. Argentine government spokesmen generally ask not to be named.

He said 800 pigs had tested positive for H1N1 flu, but that the two workers suspected of passing the virus to the pigs had never gone to a doctor so it had not been established whether or not they had the new flu strain.

The pig farm, which is located in Buenos Aires province, was put under quarantine and the spokesman said H1N1 flu tests had proved negative since June 24.

Argentines are increasingly worried about the new flu virus as peak flu season approaches in the Southern Hemisphere winter. The Health Ministry has confirmed 1,587 cases and 26 deaths, prompting officials to bring forward school holidays.