enlarge The Associated Press

Quarantine officials make their way to a plane at Narita International Airport near Tokyo on Saturday to check its passengers for signs of swine flu.

SEATTLE — Washington state health officials say a man in his 30s is the first person in the state to die from what appears to be complications of swine flu.

The state Department of Health said in a news release that a Snohomish County man in his 30s with underlying heart conditions died last week with what appears to be complications of swine-origin influenza.

The man was not identified.

So far, there have been more than 4,150 confirmed cases of swine flu in 29 countries. There have been 48 deaths in Mexico, three U.S. deaths, one in Canada and one fatality in Costa Rica. Officials said the Canadian, U.S. and Costa Rican victims also had other underlying medical conditions.

Costa Rica reported the first swine flu death outside North America on Saturday, while Japanese authorities scrambled to limit contact with their country's first confirmed cases and Mexico delayed the reopening of primary schools in some states.

Australia and Norway, meanwhile, joined the list of countries with confirmed cases of swine flu.

The Health Ministry in Costa Rica confirmed the swine flu death of a 53-year-old man.

Like other deaths outside Mexico, the Costa Rican man suffered from complicating illnesses, including diabetes and chronic lung disease. The U.S. had reported the deaths of a toddler with a heart defect and a woman with rheumatoid arthritis, and Canadian officials said the woman who died there also had other health problems.

The Costa Rican fatality was one of eight swine flu cases in the country confirmed by the U.S. Centers for Disease Control and Prevention, a health official said.

In Japan, authorities quarantined a high school teacher and two teenage students who tested positive in an airport test for swine flu after they returned from a school trip to Canada. Officials said they were working with the World Health Organization to contact at least 13 people on the flight who had gone on to other destinations.

Mexico, which raised its count of confirmed cases to 1,626 based on tests of earlier patients, continued to gradually lift a nationwide shutdown of schools, businesses, churches and soccer stadiums.