HONG KONG, Jan. 7 (Xinhua) -- The Center for Health Protection (CHP) of the Department of Health of Hong Kong Wednesday announced that the result of gene sequencing of H9N2 virus found in a baby girl indicated all genes were of avian origin.

    The baby girl, who is two months' old, was confirmed contracted H9N2 virus (a mild form of avian flu) December last year. The CHP Wednesday completed the gene sequencing on the virus sample taken from the girl.

    A CHP spokesman said that DNA sequences of the genes concerned show that they are of avian origin and re-assortment with genes of human influenza origin has not been found.

    "The virus is highly similar to the H9N2 virus isolated from another case involving a nine-month-old girl in 2007," he said.

    The spokesman said the virus found in the baby girl was sensitive to Tamiflu and Amantadine, two kinds of antiviral medicines.

    The girl is still under treatment in Tuen Mun Hospital for another disease. Her symptoms of H9N2 infection have subsided and all close contacts of her did not develop symptoms of H9N2 infection.

    "The epidemiological and genetic findings so far suggest that the H9N2 virus has shown no signs of increased risk for human-to- human transmission," the spokesman said.