Wednesday, May 29, 2013

H7N9: Doctors fear bird flu strain which has killed 36 in China has become resistance to antiviral drugs

A strain of bird flu which has killed 36 people in China can mutate to become resistant to antiviral drugs, say Chinese researchers.

Shanghai doctors treating 14 sufferers of the H7N9 virus found that it had become resistant to Tamiflu in three of the patients.

Researchers at the Shanghai Public Health Clinical Centre said that while the drug reduced levels of the virus in 11 of the patients, genetic testing of bird flu in the three who did not respond to treatment showed it was able to effectively mutate to resist Tamiflu.