Reuters: WHO probing drug resistant swine flu

GENEVA (Reuters) - The World Health Organization is looking into reports in Britain and the United States that the H1N1 flu may have developed resistance to Tamiflu in people with severely suppressed immune systems, a spokesman said Tuesday.

Britain's Health Protection Agency (HPA) said five cases have been confirmed in Wales of patients infected with H1N1 resistant to oseltamivir -- the generic name of Roche and Gilead Sciences Inc's antiviral drug Tamiflu.

The patients had serious conditions that suppressed their immune systems, which can give the virus a better than usual opportunity to develop resistance, the HPA said. It said the drug-resistant strain had probably spread person to person.

'We have seen the reports, we need to look into them,' WHO spokesman Thomas Abraham said in Geneva.

The U.S. Centers for Disease Control and Prevention last week also reported four cases of H1N1 resistant to Tamiflu at Duke University Hospital in North Carolina. All were said to be very ill with underlying severely compromised immune systems and multiple other complex medical conditions.

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Reuters: WHO probing drug resistant swine flu