Bird flu H5N1 virus was discovered in northern provinces of Nghe An and Ha Tinh that were affected by floods this month, said health officials on Friday.

Poultries are breeded in Nam Dinh Province. (File photo)

In Nghe An Province, nearly 600 poultries infected H5N1 virus in Dien Chau District were burnt.

Province health officials sterilized breeding facilities and isolate epidemic areas.

In Ha Tinh Province, the bird flu outbreak has hit Cam Xuyen District.

currently, because of high demand for chicken farmers have expanded capacity of their farms.Â

Cold whether and density of poultry farms have caused the disease be spread widely, said health officials.