The second case where humans have exposed swine with the Type A H1N1 influenza virus has surfaced in Argentina. An government spokesperson in the country said the case is not fully confirmed, but it is suspected that humans passed the virus on to the pigs.

The first case of pigs being exposed appeared on a farm in Canada. A suspected worker eventually was cleared following blood tests, but Canadian officials  did not rule out the prospect that a human infected the animals. So far the virus spread has occurred human to human across the globe. 

"Our theory is that the pigs were infected by the farm workers who had flu symptoms a week before the pigs started to show symptoms," Reuters reported the Argentine government spokesperson as saying.  

About 800 pigs with in the herd tested positive for Type A H1N1 flu. However, the two workers who may have passed the virus on to the pigs were never examined by a doctor so it was never confirmed that they carried flu strain.

The farm, located in Buenos Aires province, was quarantined and since June 24, additional testing has shown the herd to be negative for the virus. 

As the peak flu season in the Southern Hemisphere approaches with winter, many there are increasingly concerned about this new flu virus and how it might unfold. The country's Health Ministry has confirmed 1,587 Type A H1N1 cases and 26 deaths.

Source: Reuters