BEIJING - China says no other cases of bird flu have been detected in Beijing and neighbouring provinces after a woman died from the avian influenza in the capital.

The Agricultural Ministry says authorities have investigated poultry in Beijing, the port city of Tianjin and neighbouring Hebei province, but no other cases have been found.

Inspectors have stepped up checks of poultry markets and slaughterhouses and have banned live poultry from entering the capital after China's first bird flu death since February of last year.

Medical professionals are also visiting families in all districts in Beijing to look out for bird flu symptoms.

The World Health Organization says the case did not appear to signal a new public health threat.

China raises more poultry than any other country, much of it on small farms.

The Agricultural Ministry said Wednesday it will step up checks before the traditional Spring Festival holiday, or Chinese New Year, when hundreds of millions of people return home to their families and rural farms.

China's Health Ministry said tests confirmed that Huang Yanqing, 19, had contracted the H5N1 bird flu virus. She died Monday in a Beijing hospital.

The WHO said Huang's case was similar to others reported worldwide in that it does not appear to involve human-to-human transmission.

Official Xinhua News Agency said the woman had cleaned the insides of several ducks.

Workers disinfected the market in neighbouring Hebei province where the woman bought nine ducks. The market's five poultry shops have been closed.