Health animal authorities on Friday reported bird flu outbreaks in 19 sites of six provinces, including five in the Mekong Delta region, with more than 7,500 fowls culled.
Hai Duong northern province suffered the heaviest loss with 1,100 ducks and 500 chickens culled in its two districts of Kim Thanh and Gia Loc.
In Long An province, which has been hit the hardest by the outbreak in the country, bird flu recurred in three districts of Ben Luc, Thu Thua and Can Giuoc, killing almost 1,500 poultry.
Avian flu outbreaks were also reported in other Mekong Delta provinces of Ben Tre, Bac Lieu, Tra Vinh and An Giang, said the veterinary department under the Agriculture and Rural Development Ministry.
The veterinary department director, Bui Quang Anh, announced Thursday that eight provinces and one city had no new detected bird flu-affected spots in their areas for 21 days.
According to the department’s regulation, these localities, namely Kien Giang, Ninh Binh, Ha Nam, Binh Phuoc, Ninh Thuan, Lam Dong, Quang Binh and Thai Nguyen provinces and HCM City, qualify for removal from the countryâ€™s list of epidemic areas.
Initial success for vaccine
Meanwhile, Vietnamâ€™s National Institute of Hygiene and Epidemiology has gained initial success in testing a vaccine for avian flu on chickens and mice.
The vaccinated chickens and mice were able to produce antibodies against the H5N1 virus, which has been causing the avian flu in Vietnam and other regional countries.
The national institute said it would ask for permission to conduct tests of the vaccine on a small group of volunteers and then on a larger group of people.
Professor Nguyen Thi Thu Van, director of the Vaccine Co 1 under the national institute, said her company would continue to develop at least five series of such vaccines for further testing.
The move, Van added, will help affirm the initial results and the technological stability of mass producing the vaccine as required by the World Health Organisation.