A 50-year-old woman with life-threatening cancer became the third Australian with swine flu to die on Wednesday, as Indonesia and Cambodia reported their first confirmed cases. The Australian fatality is the fourth swine flu-related death in the Asia-Pacific region. The Philippines reported a patient with the virus died on Monday. The Australian woman was admitted to a Melbourne hospital on Saturday with respiratory illness and died Wednesday, a day after testing positive for swine flu, Victoria state Health Minister Daniel Andrews said. Authorities are not certain whether any of the three swine flu-related deaths in Australia were directly caused by the virus because all of them had other serious illnesses. 'We know that for immunosuppressed people, especially those who are being treated for life-threatening cancers, any respiratory illness can seriously compromise their health,' said senior health official Rosemary Lester. Australian confirmed 2,873 swine flu cases as of Wednesday, an increase of 140 in a day. Medical advocates have urged the government to make efforts to protect Aborigines, who often live in unhygienic townships with limited medical services, making them especially vulnerable. The Northern Territory, which has the country's highest proportion of Aborigines, reported the nation's highest swine flu infection rate per capita -- 35 cases per 100,000 people. Federal Health Minister Nicola Roxon said Tuesday that authorities were taking steps to ensure that indigenous communities had adequate supplies of antiviral medication. Australia's nearest Asian neighbor, Indonesia, announced its first swine flu infections Wednesday. A British woman and an Indonesian pilot who had been abroad were recovering after being admitted to hospitals with fever and flu-like symptoms. Health Minister Siti Fadilah Supari said the patients have been isolated and that 'the disease has not yet spread in Indonesia.' But she warned it could become more deadly if it were to mutate with bird flu, which is endemic in national poultry flocks. Indonesia was hardest hit by bird flu, with 119 human deaths since it first struck in 2003. The vast majority of bird flu infections have been fatal. The Philippines, meanwhile, reported 131 new swine flu cases Wednesday in the largest single-day jump in infections in the country, bringing total cases to 604. Health Secretary Francisco Duque III said a number of 'low-level' community outbreaks had been reported in some parts of the capital, metropolitan Manila. The newly infected include 14 foreigners, Duque said. Philippine President Gloria Macapagal Arroyo and her 30-member entourage, including at least six Cabinet members, will voluntarily go into quarantine for several days when they return home Friday from a 10-day foreign trip to four countries, including the United States, Executive Secretary Eduardo Ermita said Wednesday. Thailand announced 86 new cases of swine flu, bringing the country's total to 985, the health ministry said. Public Health Minister Withaya Kaewparadai said Wednesday most patients had fully recovered and only 15 remained hospitalized. None was in critical condition. The ministry earlier said the flu had been found at dozens of schools and universities since the country's first case was confirmed in late April, prompting authorities to temporarily close them for disinfecting. Hong Kong confirmed 36 more cases of swine flu Wednesday, bringing the city's total to 444, the Department of Health said in a statement. There have been no reports of deaths in the territory. Cambodia's health minister announced the country's first case of swine flu. Mam Bun Heng said the 16-year-old American girl came to Cambodia as part of a student group on June 19 and developed flu symptoms the following day. In neighboring Laos, the National Center for Laboratory and Epidemiology confirmed the third case of swine flu in the country, reported the Vientiane Times newspaper. In Bangladesh, six people who recently returned from trips to the United States tested positive for swine flu, government doctor Mahmudur Rahman said. They are in addition to the country's first case, which was detected last Friday. The World Health Organization has declared swine flu a pandemic. As of Monday, it said more than 52,000 cases had been reported worldwide with 231 deaths, mostly in Mexico and the United States. 