Some strains of bird flu are coming ever closer to developing the traits they need to cause a human pandemic, a study released yesterday said. Researchers who analyzed samples of recent avian flu viruses found that a few H7 strains of the virus that have caused minor, untransmissible infections in people in North America between 2002 and 2004 have increased their affinity for the sugars found on human tracheal cells.
Subsequent tests in ferrets suggested that these viral strains were not readily transmissible. But one strain of the H7N2 virus, a low pathogenic avian flu strain isolated from a man in New York in 2003, replicated in the ferret’s respiratory tract and was passed between infected and uninfected ferrets suggesting it could be transmissible in humans.
The investigators said the evidence suggests that the virus could be evolving toward the same strong sugar-binding properties of the three worldwide viral pandemics in 1918, 1957 and 1968.
“These findings suggest that the H7 class of viruses are partially adapted to recognize the receptors that are preferred by the human influenza virus,” said Terrence Tumpey, a senior microbiologist with the US Centers for Disease Control and Prevention in Atlanta, Georgia.
The authors said that if the viruses continue to evolve in this direction, the avian flu viruses could travel more easily between other animals and humans.
They called for strict surveillance of avian flu viruses and continuing federal preparations for a possible future pandemic.
The study appears in the Proceedings of the National Academy of Sciences.
Taiwan last night blanked world No. 1 Japan 4-0 to win the World Baseball Softball Confederation’s (WBSC) Premier12 for the first time. Taiwanese ace Lin Yu-min (林昱珉) held defending champions Japan to just one hit and no runs in the first four innings, before catcher Lin Chia-cheng (林家正) opened the fifth inning with a solo home run. That was soon followed by a three-run homer from Taiwanese captain Chen Chieh-hsien (陳傑憲) to put Taiwan ahead in the prestigious tournament of the world’s top 12 baseball teams. In addition to a superb performance from 21-year-old Arizona Diamondbacks prospect Lin, three more Taiwanese pitchers
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Taiwan yesterday advanced to the gold medal match of the World Baseball Softball Confederation’s (WBSC) Premier12 for the first time in history, despite last night losing 9-6 to Japan. Taiwan advanced after the US defeated Venezuela in the first game on the last day of the Super Round. However, the US had no chance of advancing to the championship game unless it defeated Venezuela by at least nine points. The US won 6-5. As a result, the two teams — who both had one win and two losses in the Super Round — are to face off again in the
Minister of Labor Ho Pei-shan (何佩珊) said she would tender her resignation following criticism of her handling of alleged bullying by Ministry of Labor Workforce Development Agency branch director Hsieh Yi-jung (謝宜容) resulting in the death of an employee. The ministry yesterday gave Hsieh two demerits and said she is subject to review by the Disciplinary Court. The severest possible punishment would be her removal from office and being barred from government jobs indefinitely. Workforce Development Agency Director-General Tsai Meng-liang (蔡孟良) also received a major demerit and was transferred to another position. Premier Cho Jung-tai (卓榮泰) issued a formal apology
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