The Argentine health ministry reported the rise in the death toll on Tuesday. More people have died of swine flu in Argentina than any other country in South America.
Measures to prevent and control the spread of the H1N1 virus would continue, the ministry said.
Buenos Aires health chief Nestor Perez Balino told local media that some non-urgent operations were being postponed to free up hospital beds.
But he said the situation regarding the H1N1 virus was no more worrying than seasonal flu, and that patients who had died had suffered other medical complications.
Swine flu "is very infectious but no more virulent than regular flu", he said.
The H1N1 virus first emerged in April in Mexico, which has recorded 113 deaths and 7,624 cases, according to the WHO.
In an interview with the BBC, Mexican Deputy Health Minister Mauricio Hernandez Avila said his country was prepared for the outbreak, having had a plan in place for four or five years to deal with a pandemic.
"We took 10 days from the (first) case to alert the world that we were seeing a new virus," he said.
"We did, I think, a remarkable good job in...preparing the world for this event."
The Mexican authorities are hosting an international summit on swine flu in Cancun next month.
Chilean President Michelle Bachelet, who has been visiting Washington, was due to hold talks with officials from the Pan American Health Organization. She is set to travel later on Wednesday to Mexico.
Her country has seen cases of swine flu rise to 5,186 - the most in South America - and reported seven deaths, according to the health ministry.
Last week, the Chilean government stepped up measures to deal with the outbreak.
Worldwide, the US, which has seen 87 deaths, has reported the most cases with 21,449.
Canada has seen 15 deaths and 6,457 cases, according to the Canadian health ministry.
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