Via The Nation :
" Chulalongkorn University's leading influenza virologist yesterday announced that four people had been infected with oseltamivirresistant H1N1 flu virus since the pandemic hit the country in April 2009.
Dr Yong Poovorawan, who heads the Faculty of Medicine at Chulalongkorn Hospital's Centre of Excellence in Clinical Virology, said his team had collected 1,100 samples from people who were infected with the H1N1 virus after the 2009 outbreak and found that four people in Bangkok had developed resistance to the antiviral drug oseltamivir.
He said there were no reports of oseltamivir resistance during the first wave of the pandemic from June to September 2009. But a patient reportedly developed resistance to the drug in the second wave of the flu pandemic from January to March this year.
The other three cases of oseltamivir resistance were reported in the third wave of the pandemic, during the past two months.
"The development of oseltamivir resistance in patients was caused by overuse of the drug," Yong told an annual seminar hosted by the Faculty of Medicine's paediatric division at Chulalongkorn University."
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