PHNOM PENH, June 29 (Xinhua) -- A 46-year-old Cambodian mother and her 16-year-old son have been confirmed positive for H5N1 human avian influenza, bringing the total number of cases to 10 so far this year, the Ministry of Health said in a statement on Sunday.

Both victims live in Lbeuk village of Puok district in northwest Siem Reap province.

"According to queries, there were sick and dead poultry at the patients' home and their neighbors' homes as well as in the village, and the patients had been in contact with sick and dead chickens and cooked them for food," it added.

Health authorities are looking into the source of the infection and are examining any suspected cases or people who have been in contact with the victims in order to prevent an outbreak in the community.

Tamiflu (oseltamivir), an antiviral drug to prevent the bird flu from spreading, was also given out to people who had direct contact with the patients, the statement said.

So far this year, the kingdom recorded 10 human cases of H5N1 bird flu, with five deaths, according to the Ministry of Health. ■